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Shingo Watanabe

Section

Advanced Institute for Marine Ecosystem Change

Job title

Professor

researchmap

https://researchmap.jp/shingo_watanabe

J-GLOBAL ID

201801007302419216

Research History 9

2026/04 - Present

Japan Agency for Marine-Earth Science and Technology　Research Center for Environmental Modeling and Application (CEMA), Research Institute for Global Change (RIGC)　Director
2024/04 - Present

Tohoku University　Advanced Institute for Marine Ecosystem Change　Professor
2019/04 - 2026/03

Japan Agency for Marine-Earth Science and Technology　Research Center for Environmental Modeling and Application, Research Institute for Global Change　Deputy director
2014/04 - 2019/03

Japan Agency for Marine-Earth Science and Technology　Department of Seamless Environmental Prediction　Director
2012/04 - 2014/03

Japan Agency for Marine-Earth Science and Technology　Research Institute for Global Change　Senior researcher
2007/04 - 2012/03

Japan Agency for Marine-Earth Science and Technology　Researcher
2004/07 - 2007/03

Japan Agency for Marine-Earth Science and Technology
2002/11 - 2004/06

Frontier Research System for Global Change　Researcher
2001/04 - 2002/10

Kyushu University　Graduate School of Sciences Department of Earth and Planetary Sciences　JSPS research fellow

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Research Areas 1

Natural sciences / Atmospheric and hydrospheric science /

Papers 176

CMIP6 Model Biases in Antarctic Stratospheric Vortex Dynamics and Their Implications for Southern Hemisphere Circulation Projections

Ghyslaine Boschat, Eun-Pa Lim, Julia Mindlin, Philipp Breul, Amy H. Butler, Alexey Yu Karpechko, Isla R. Simpson, Natalia Calvo, Ryan S. Williams, Shingo Watanabe

Journal of Climate　2026/08/01

DOI： 10.1175/JCLI-D-26-0097.1 　
On the Role of Dynamical Uncertainties in the Spread of Arctic Ozone Recovery Projections

Samuel Benito‐Barca, Marta Abalos, Natalia Calvo, Alvaro de la Cámara, Blanca Ayarzagüena, Gabriel Chiodo, Hideharu Akiyoshi, Fraser Dennison, Patrick Jöckel, Béatrice Josse, Doug Kinnison, Olaf Morgenstern, David Plummer, Timofei Sukhodolov, Yousuke Yamashita, Shingo Watanabe

Geophysical Research Letters　53　(10)　2026/05/20
Publisher: American Geophysical Union (AGU)
DOI： 10.1029/2025gl120212 　

ISSN： 0094-8276

eISSN： 1944-8007

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Abstract Arctic ozone is projected to recover over the 21st century in compliance with the Montreal Protocol. Chemistry‐climate models show a large spread in recovery rates and future changes in key dynamical features such as the polar vortex and the residual circulation. Here, we quantify the spread in Arctic ozone recovery explained by uncertainties in these dynamical changes, using simulations from the Chemistry‐Climate Model Initiative, phases 1 and 2022. About 60% of the spread in projected ozone recovery is attributed to differences in polar vortex trends and about one‐third to the intermodel spread in residual circulation trends. Ozone‐depleting substances and greenhouse gas‐driven global warming contribute similarly to the spread in ozone recovery, although uncertainties in dynamical trends primarily affect the warming component. While dynamical changes clearly separate the simulated ozone recovery among different models, the large variability in the Arctic stratosphere precludes establishing an observational constraint on future ozone recovery.
Quantifying the effectiveness of multiple SAI strategies across different dimensions

Cindy Wang, Daniele Visioni, Walker Raymond Lee, Alistair Duffey, Christopher R. Wentland, Lauren Wheeler, Benjamin Wagman, Samantha Turbeville, Shingo Watanabe, Matthew Henry

2026/04/27

DOI： 10.22541/essoar.15002441/v1 　
Evaluation of stratospheric transport in three generations of Chemistry-Climate Models

Marta Abalos, Thomas Birner, Andreas Chrysanthou, Sean Davis, Alvaro de la Cámara, Sandip Dhomse, Hella Garny, Michaela I. Hegglin, Daan Hubert, Oksana Ivaniha, James Keeble, Marianna Linz, Daniele Minganti, Jessica Neu, David Plummer, Laura Saunders, Kasturi Shah, Gabriele Stiller, Kleareti Tourpali, Darryn Waugh, Nathan Luke Abraham, Hideharu Akiyoshi, Martyn P. Chipperfield, Patrick Jöckel, Béatrice Josse, Marion Marchand, Patrick Martineau, Olaf Morgenstern, Timofei Sukhodolov, Shingo Watanabe, Yousuke Yamashita

Atmospheric Chemistry and Physics　26　(8)　5249-5291　2026/04/21
Publisher: Copernicus GmbH
DOI： 10.5194/acp-26-5249-2026 　

eISSN： 1680-7324

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Abstract. The representation of stratospheric transport in Chemistry-Climate Models (CCMs) is key for accurately reproducing and projecting the evolution of the ozone layer and other radiatively relevant trace gases. We evaluate stratospheric transport in CCMs that have participated in three model intercomparison initiatives (CCMVal-2, CCMI-1, and CCMI-2022) over the last ∼ 15 years using modern satellite datasets and reanalyses. Key long-standing model biases persist across generations, with some worsening in recent simulations. Transport remains overly fast in the models, with a global mean age of air young bias of ∼ 1 year for the CCMI-2022 median. It is argued that this bias could be associated with too fast tropical upwelling in the lower stratosphere and possibly to excessive vertical diffusion, with mixing biases being more uncertain. In the springtime southern polar stratosphere, the final warming is delayed (∼ 3 weeks), downwelling is underestimated (∼ 25 %), and the depth of the ozone minimum is overestimated (∼ 10 DU) on average in the most recent models. The tropopause is too high in all generations, and the tropical cold point tropopause is too warm in the latest generation (∼ 1–2 K). Long-term trends in transport over 1980–1999 are consistent across model generations and highlight the crucial role of ozone depletion in contributing to accelerate the Brewer-Dobson circulation and delaying the southern polar vortex breakdown.
QBOi El Niño Southern Oscillation experiments: assessing relationships between ENSO, MJO, and QBO Peer-reviewed

Dillon Elsbury, Federico Serva, Julie M. Caron, Seung-Yoon Back, Clara Orbe, Jadwiga H. Richter, James A. Anstey, Neal Butchart, Chih-Chieh Chen, Javier García-Serrano, Anne Glanville, Yoshio Kawatani, Tobias Kerzenmacher, Francois Lott, Hiroaki Naoe, Scott Osprey, Froila M. Palmeiro, Seok-Woo Son, Masakazu Taguchi, Stefan Versick, Shingo Watanabe, Kohei Yoshida

Weather and Climate Dynamics　7　(1)　317-339　2026/02/04
Publisher: Copernicus GmbH
DOI： 10.5194/wcd-7-317-2026 　

eISSN： 2698-4016

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Abstract. This study uses an ensemble of climate model experiments coordinated by the Quasi-Biennial Oscillation initiative (QBOi) to analyze the Madden-Julian Oscillation (MJO) in the presence of either perpetual El Niño or La Niña sea surface temperatures during boreal winter. In addition to the prescribed El Niño Southern Oscillation (ENSO) conditions, the nine models internally generate QBOs, meaning each may influence the MJO. Objectives of our analyses are to assess the response of the MJO to strong idealized ENSO forcing and look for evidence of a QBO influence on the MJO in a multi-model context. The diagnostics used include wavenumber-frequency spectra of tropical convective and dynamical fields, measures of MJO lifetime, an evaluation of MJO diversity and visualization of MJO vertical structure, as well as an assessment of QBO morphology and the QBO's impact on tropical convection. Kelvin wave spectral power increases in the El Niño simulations whereas equatorial Rossby waves power is stronger in the La Niña simulations. All models simulate faster MJO propagation under El Niño conditions. This change in speed is corroborated by the MJO diversity analysis, which reveals that models better reproduce the observed “fast propagating” and “standing” MJO archetypes given perpetual El Niño and La Niña, respectively. Regardless of ENSO, QBO descent into the lower stratosphere is underestimated and we detect little QBO influence on tropical tropopause stability and MJO activity. With little influence from the QBO on the MJO activity in these runs, we can be confident that the aforementioned changes in the MJO indeed arise from the different ENSO boundary conditions.
Experimental protocol for phase 1 of the APARC QUOCA (QUasibiennial oscillation and Ozone Chemistry interactions in the Atmosphere) working group Peer-reviewed

Clara Orbe, Alison Ming, Gabriel Chiodo, Michael Prather, Mohamadou Diallo, Qi Tang, Andreas Chrysanthou, Hiroaki Naoe, Xin Zhou, Irina Thaler, Dillon Elsbury, Ewa Bednarz, Jonathon S. Wright, Aaron Match, Shingo Watanabe, James Anstey, Tobias Kerzenmacher, Stefan Versick, Marion Marchand, Feng Li, James Keeble

Geoscientific Model Development　19　(2)　773-794　2026/01/23
Publisher: Copernicus GmbH
DOI： 10.5194/gmd-19-773-2026 　

eISSN： 1991-9603

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Abstract. The quasi-biennial oscillation (QBO) is the main mode of variability in the tropical stratosphere, influencing the predictability of other regions in the atmosphere through its teleconnections to the stratospheric polar vortices and coupling to surface tropical and extratropical variability. However, climate and forecasting models consistently underestimate QBO amplitudes in the lower stratosphere, likely contributing to their failure to simulate these teleconnections. One underexplored contributor to model biases is missing representation of ozone-radiative feedbacks, which enhance temperature variability in the lower stratosphere, particularly at periods at and greater than the QBO (>28 months). While previous studies suggest that ozone-radiative feedbacks can impact QBO periods, amplitudes and the associated secondary circulation in the lower stratosphere, the reported impacts differ widely among models and are hard to interpret due to differences in methodology. To this end, here we propose a coordinated experimental protocol – held joint between the Atmospheric Processes and their Role in Climate (APARC) Quasi-Biennial Oscillation Initiative (QBOi) and Chemistry Climate Modeling Initiative (CCMI) activities – which is aimed at assessing the coupling between stratospheric ozone, temperature and the circulation. We use the proposed experiments to define the ozone feedback on the QBO in both present-day and idealized (abrupt quadrupling of carbon dioxide) climates. While primary focus is on the QBO, the proposed protocol also enables analysis of other aspects of ozone-radiative-dynamical coupling in the atmosphere, including impacts on the Brewer-Dobson Circulation and tropospheric eddy-driven jet responses to future climate change. Here we document the scientific rationale and design of the QUOCA Phase 1 experiments, summarize the data request, and give a brief overview of participating models. Preliminary results using the NASA Goddard Institute for Space Studies E2-2 climate model are used to illustrate sensitivities to certain methodological choices.
QBOi El Niño-Southern Oscillation experiments: teleconnections of the QBO Peer-reviewed

Hiroaki Naoe, Jorge L. Garcia-Franco, Chang-Hyun Park, Mario Rodrigo, Froila M. Palmeiro, Federico Serva, Masakazu Taguchi, Kohei Yoshida, James A. Anstey, Javier Garcia-Serrano, Seok-Woo Son, Yoshio Kawatani, Neal Butchart, Kevin Hamilton, Chih-Chieh Chen, Anne Glanville, Tobias Kerzenmacher, Francois Lott, Clara Orbe, Scott Osprey, Mijeong Park, Jadwiga H. Richter, Stefan Versick, Shingo Watanabe

WEATHER AND CLIMATE DYNAMICS　6　(4)　1419-1442　2025/11/17

DOI： 10.5194/wcd-6-1419-2025 　

eISSN： 2698-4016
Comparing multi-model ensemble simulations with observations and decadal projections of upper atmospheric variations following the Hunga eruption Peer-reviewed

Zhihong Zhuo, Xinyue Wang, Yunqian Zhu, Wandi Yu, Ewa M. Bednarz, Eric Fleming, Peter R. Colarco, Shingo Watanabe, David Plummer, Georgiy Stenchikov, William Randel, Adam Bourassa, Valentina Aquila, Takashi Sekiya, Mark R. Schoeberl, Simone Tilmes, Jun Zhang, Paul J. Kushner, Francesco S. R. Pausata

ATMOSPHERIC CHEMISTRY AND PHYSICS　25　(20)　13161-13176　2025/10/21

DOI： 10.5194/acp-25-13161-2025 　

ISSN： 1680-7316

eISSN： 1680-7324
QBOi El Niño-Southern Oscillation experiments: overview of the experimental design and ENSO modulation of the QBO Peer-reviewed

Yoshio Kawatani, Kevin Hamilton, Shingo Watanabe, Masakazu Taguchi, Federico Serva, James A. Anstey, Jadwiga H. Richter, Neal Butchart, Clara Orbe, Scott M. Osprey, Hiroaki Naoe, Dillon Elsbury, Chih-Chieh Chen, Javier Garcia-Serrano, Anne Glanville, Tobias Kerzenmacher, Francois Lott, Froila M. Palmeiro, Mijeong Park, Stefan Versick, Kohei Yoshida

WEATHER AND CLIMATE DYNAMICS　6　(4)　1045-1073　2025/10/06

DOI： 10.5194/wcd-6-1045-2025 　

eISSN： 2698-4016
Tropical volcanic impacts on MENA climate via ENSO and NAO dynamics in a high-top model Peer-reviewed

Muhammad Mubashar Dogar, Shingo Watanabe, Masatomo Fujiwara, Muhammad Adnan Abid, Turki M. Habeebullah, Basit Khan

NPJ CLIMATE AND ATMOSPHERIC SCIENCE　8　(1)　2025/09/29

DOI： 10.1038/s41612-025-01201-x 　

ISSN： 2397-3722
Hunga Tonga-Hunga Ha′apai Volcano Impact Model Observation Comparison (HTHH-MOC) project: experiment protocol and model descriptions Peer-reviewed

Yunqian Zhu, Hideharu Akiyoshi, Valentina Aquila, Elizabeth Asher, Ewa M. Bednarz, Slimane Bekki, Christoph Bruhl, Amy H. Butler, Parker Case, Simon Chabrillat, Gabriel Chiodo, Margot Clyne, Peter R. Colarco, Sandip Dhomse, Lola Falletti, Eric Fleming, Ben Johnson, Andrin Jorimann, Mahesh Kovilakam, Gerbrand Koren, Ales Kuchar, Nicolas Lebas, Qing Liang, Cheng-Cheng Liu, Graham Mann, Michael Manyin, Marion Marchand, Olaf Morgenstern, Paul Newman, Luke D. Oman, Freja F. Osterstrom, Yifeng Peng, David Plummer, Ilaria Quaglia, William Randel, Samuel Remy, Takashi Sekiya, Stephen Steenrod, Timofei Sukhodolov, Simone Tilmes, Kostas Tsigaridis, Rei Ueyama, Daniele Visioni, Xinyue Wang, Shingo Watanabe, Yousuke Yamashita, Pengfei Yu, Wandi Yu, Jun Zhang, Zhihong Zhuo

GEOSCIENTIFIC MODEL DEVELOPMENT　18　(17)　5487-5512　2025/09/01

DOI： 10.5194/gmd-18-5487-2025 　

ISSN： 1991-959X

eISSN： 1991-9603
The Mechanism of Interhemispheric Coupling Revealed by a Gravity-Wave-Permitting General Circulation Model Peer-reviewed

Haruka Okui, Kaoru Sato, Shingo Watanabe

Journal of Geophysical Research: Atmospheres　2025/07/29

DOI： 10.22541/essoar.174139219.91870304/v2 　
Response of QBO Bias to Convection Scheme in an AGCM Peer-reviewed

Yuya Baba, Shingo Watanabe

Journal of Geophysical Research: Atmospheres　130　(12)　2025/06/28

DOI： 10.1029/2024JD042501 　

ISSN： 2169-897X

eISSN： 2169-8996
Recent Lower Stratospheric Ozone Trends in CCMI-2022 Models: Role of Natural Variability and Transport Peer-reviewed

Samuel Benito-Barca, Marta Abalos, Natalia Calvo, Hella Garny, Thomas Birner, Nathan Luke Abraham, Hideharu Akiyoshi, Fraser Dennison, Patrick Joeckel, Beatrice Josse, James Keeble, Doug Kinnison, Marion Marchand, Olaf Morgenstern, David Plummer, Eugene Rozanov, Sarah Strode, Timofei Sukhodolov, Shingo Watanabe, Yousuke Yamashita

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　130　(9)　2025/05/09

DOI： 10.1029/2024JD042412 　

ISSN： 2169-897X

eISSN： 2169-8996
Contribution of microtopography off the Ryukyu Islands to coastal sea-level amplification during the 2022 Tonga meteotsunami Peer-reviewed

Takuya Miyashita, Ai Nishino, Shingo Watanabe, Tomohiro Yasuda, Nobuhito Mori, Tomoya Shimura, Tung-Cheng Ho

Earth, Planets and Space　77　(1)　2025/02/24

DOI： 10.1186/s40623-025-02148-2 　

eISSN： 1880-5981
The JAGUAR-DAS whole neutral atmosphere reanalysis: JAWARA Peer-reviewed

Dai Koshin, Kaoru Sato, Shingo Watanabe, Kazuyuki Miyazaki

Progress in Earth and Planetary Science　12　(1)　2025/01/10

DOI： 10.1186/s40645-024-00674-3 　

ISSN： 2197-4284

eISSN： 2197-4284
Global-scale gravity wave analysis methodology for the ESA Earth Explorer 11 candidate CAIRT Peer-reviewed

Sebastian Rhode, Peter Preusse, Jörn Ungermann, Inna Polichtchouk, Kaoru Sato, Shingo Watanabe, Manfred Ern, Karlheinz Nogai, Björn-Martin Sinnhuber, Martin Riese

Atmospheric Measurement Techniques　17　(19)　5785-5819　2024/10/02

DOI： 10.5194/amt-17-5785-2024 　

ISSN： 1867-1381

eISSN： 1867-8548
Comparison between non‐orographic gravity‐wave parameterizations used in QBOi models and Strateole 2 constant‐level balloons Peer-reviewed

F. Lott, R. Rani, C. McLandress, A. Podglajen, A. Bushell, M. Bramberger, H.‐K. Lee, J. Alexander, J. Anstey, H.‐Y. Chun, A. Hertzog, N. Butchart, Y.‐H. Kim, Y. Kawatani, B. Legras, E. Manzini, H. Naoe, S. Osprey, R. Plougonven, H. Pohlmann, J. H. Richter, J. Scinocca, J. García‐Serrano, F. Serva, T. Stockdale, S. Versick, S. Watanabe, K. Yoshida

Quarterly Journal of the Royal Meteorological Society　150　(763)　3721-3736　2024/07/05
Publisher: Wiley
DOI： 10.1002/qj.4793 　

ISSN： 0035-9009

eISSN： 1477-870X

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Abstract Gravity‐wave (GW) parameterizations from 12 general circulation models (GCMs) participating in the Quasi‐Biennial Oscillation initiative (QBOi) are compared with Strateole 2 balloon observations made in the tropical lower stratosphere from November 2019–February 2020 (phase 1) and from October 2021–January 2022 (phase 2). The parameterizations employ the three standard techniques used in GCMs to represent subgrid‐scale non‐orographic GWs, namely the two globally spectral techniques developed by Warner and McIntyre (1999) and Hines (1997), as well as the “multiwaves” approaches following the work of Lindzen (1981). The input meteorological fields necessary to run the parameterizations offline are extracted from the ERA5 reanalysis and correspond to the meteorological conditions found underneath the balloons. In general, there is fair agreement between amplitudes derived from measurements for waves with periods less than h and parameterizations. The correlation between the daily observations and the corresponding results of the parameterization can be around 0.4, which is significant, since 1200 days of observations are used. Given that the parameterizations have only been tuned to produce a quasi‐biennial oscillation (QBO) in the models, the 0.4 correlation coefficient of the GW momentum fluxes is surprisingly good. These correlations nevertheless vary between schemes and depend little on their formulation (globally spectral versus multiwaves for instance). We therefore attribute these correlations to dynamical filtering, which all schemes take into account, whereas only a few relate the gravity waves to their sources. Statistically significant correlations are mostly found for eastward‐propagating waves, which may be due to the fact that during both Strateole 2 phases the QBO is easterly at the altitude of the balloon flights. We also found that the probability density functions (pdfs) of the momentum fluxes are represented better in spectral schemes with constant sources than in schemes (“spectral” or “multiwaves”) that relate GWs only to their convective sources.
Roles of Gravity Waves in Preconditioning of a Stratospheric Sudden Warming Peer-reviewed

Haruka Okui, Dai Koshin, Shingo Watanabe, Kaoru Sato

Journal of Geophysical Research: Atmospheres　2024/05/10

DOI： 10.22541/essoar.171535751.18240483/v1 　
G6-1.5K-SAI: a new Geoengineering Model Intercomparison Project (GeoMIP) experiment integrating recent advances in solar radiation modification studies Peer-reviewed

Daniele Visioni, Alan Robock, Jim Haywood, Matthew Henry, Simone Tilmes, Douglas G. MacMartin, Ben Kravitz, Sarah J. Doherty, John Moore, Chris Lennard, Shingo Watanabe, Helene Muri, Ulrike Niemeier, Olivier Boucher, Abu Syed, Temitope S. Egbebiyi, Roland Seferian, Ilaria Quaglia

GEOSCIENTIFIC MODEL DEVELOPMENT　17　(7)　2583-2596　2024/04/09

DOI： 10.5194/gmd-17-2583-2024 　

ISSN： 1991-959X

eISSN： 1991-9603
Effects of Mid‐Latitude Oceanic Fronts on the Middle Atmosphere Through Upward Propagating Atmospheric Waves Peer-reviewed

Y. Kawatani, H. Nakamura, S. Watanabe, K. Sato

Geophysical Research Letters　2024/03/28

DOI： 10.1029/2024GL108262 　
Public attitude toward solar radiation modification: results of a two-scenario online survey on perception in four Asia–Pacific countries Peer-reviewed

Masahiro Sugiyama, Shinichiro Asayama, Takanobu Kosugi, Atsushi Ishii, Shingo Watanabe

Sustainability Science　20　(2)　675-675　2024

DOI： 10.1007/s11625-024-01520-7 　

ISSN： 1862-4065

eISSN： 1862-4057
Evaluation of tornadic environments and their trends and projected changes in Japan Peer-reviewed

Sho Kawazoe, Masaru Inatsu, Mikiko Fujita, Shiori Sugimoto, Yasuko Okada, Shingo Watanabe

npj Climate and Atmospheric Science　6　(1)　2023/11/28
Publisher: Springer Science and Business Media LLC
DOI： 10.1038/s41612-023-00524-x 　

eISSN： 2397-3722

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Abstract Tornadoes are responsible for several high-impact weather disasters in Japan. However, little is known about how these events have changed over the last several decades or how they may change in future climates. This study examines environmental conditions associated with tornados in Japan using pseudo-soundings from the high-resolution fifth-generation ECMWF reanalysis. We first determine appropriate discriminators of F2+ tornadoes using thermodynamic (convective available potential energy, convective inhibition, lifting condensation level, and the K-index), kinematic (bulk wind difference and storm-relative helicity), and multivariate tornado parameters (energy helicity index, K-helicity index, and the significant tornado parameter), and confirm that F2+ tornadoes occur in environments with higher instability and helicity, but are better distinguished using multivariate parameters. Recent trends indicate that F2+ environments have increased significantly in some regions over the last four decades. We also examined future changes for each parameter using a large ensemble 2-K warming experiment. Robust increases in strong tornado environments are depicted in many regions in Japan, particularly on the Sea of Japan side and the Kanto region. This indicates that despite projected decreases in bulk wind difference and higher convective inhibition, significant increases in atmospheric instability compensate, leading to more days with F2+ tornado potential.
Interhemispheric Coupling Study by Observations and Modelling (ICSOM): Concept, Campaigns, and Initial Results Peer-reviewed

Kaoru Sato, Yoshihiro Tomikawa, Masashi Kohma, Ryosuke Yasui, Dai Koshin, Haruka Okui, Shingo Watanabe, Kazuyuki Miyazaki, Masaki Tsutsumi, Damian Murphy, Chris Meek, Yufang Tian, Manfred Ern, Gerd Baumgarten, Jorge L. Chau, Xinzhao Chu, Richard Collins, Patrick J. Espy, Hiroyuki Hashiguchi, Andrew J. Kavanagh, Ralph Latteck, Franz‐Josef Lübken, Marco Milla, Satonori Nozawa, Yasunobu Ogawa, Kazuo Shiokawa, M. Joan Alexander, Takuji Nakamura, William E. Ward

Journal of Geophysical Research: Atmospheres　128　(11)　2023/05/29
Publisher: American Geophysical Union (AGU)
DOI： 10.1029/2022jd038249 　

ISSN： 2169-897X

eISSN： 2169-8996

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Abstract An international joint research project, entitled Interhemispheric Coupling Study by Observations and Modelling (ICSOM), is ongoing. In the late 2000s, an interesting form of interhemispheric coupling (IHC) was discovered: when warming occurs in the winter polar stratosphere, the upper mesosphere in the summer hemisphere also becomes warmer with a time lag of days. This IHC phenomenon is considered to be a coupling through processes in the middle atmosphere (i.e., stratosphere, mesosphere, and lower thermosphere). Several plausible mechanisms have been proposed so far, but they are still controversial. This is mainly because of the difficulty in observing and simulating gravity waves (GWs) at small scales, despite the important role they are known to play in middle atmosphere dynamics. In this project, by networking sparsely but globally distributed radars, mesospheric GWs have been simultaneously observed in seven boreal winters since 2015/16. We have succeeded in capturing five stratospheric sudden warming events and two polar vortex intensification events. This project also includes the development of a new data assimilation system to generate long‐term reanalysis data for the whole middle atmosphere, and simulations by a state‐of‐the‐art GW‐permitting general circulation model using the reanalysis data as initial values. By analyzing data from these observations, data assimilation, and model simulation, comprehensive studies to investigate the mechanism of IHC are planned. This paper provides an overview of ICSOM, but even initial results suggest that not only GWs but also large‐scale waves are important for the mechanism of the IHC.
Mechanism of a meteorological tsunami reaching the Japanese coast caused by Lamb and Pekeris waves generated by the 2022 Tonga eruption Peer-reviewed

Tatsuo Suzuki, Masuo Nakano, Shingo Watanabe, Hiroaki Tatebe, Yuki Takano

Ocean Modelling　181　102153-102153　2023/02
Publisher: Elsevier BV
DOI： 10.1016/j.ocemod.2022.102153 　

ISSN： 1463-5003
Gravity Wave Morphology During the 2018 Sudden Stratospheric Warming Simulated by a Whole Neutral Atmosphere General Circulation Model Peer-reviewed

S. Watanabe, D. Koshin, S. Noguchi, K. Sato

Journal of Geophysical Research: Atmospheres　127　(19)　2022/10/16
Publisher: American Geophysical Union (AGU)
DOI： 10.1029/2022jd036718 　

ISSN： 2169-897X

eISSN： 2169-8996
First Detection of the Pekeris Internal Global Atmospheric Resonance: Evidence from the 2022 Tonga Eruption and from Global Reanalysis Data Peer-reviewed

Shingo Watanabe, Kevin Hamilton, Takatoshi Sakazaki, Masuo Nakano

Journal of the Atmospheric Sciences　2022/09/12
Publisher: American Meteorological Society
DOI： 10.1175/jas-d-22-0078.1 　

ISSN： 0022-4928

eISSN： 1520-0469

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Abstract We used observations and model simulation to examine the atmospheric pulses that dominate the far field in the hours after the January 2022 Tonga eruption. We analyzed radiance observations taken from the Himawari-8 geostationary satellite and showed that both a Lamb wave front with the expected horizontal phase speed ∼315 m-s⁻¹ and a distinct front with phase speed ∼245 m-s⁻¹ can be detected. The slower phase speed is consistent with that expected for the global internal resonant mode that had been proposed by Pekeris in 1937 and in other idealized theoretical studies over the past century, but which had never been detected in the atmosphere. A simulation of the eruption aftermath was performed with a high resolution atmospheric general circulation model. A hot anomaly over the volcano location was introduced instantaneously to the model fields and the model was integrated for another 12 hours. This produced a simulated wave pulse that, in the far field, agreed reasonably well with barograph observations of the Lamb wave. The model results also showed the presence of the slower pulse and that this disturbance had a vertical structure with a 180° phase shift in the stratosphere, in agreement with the theoretical prediction for the internal resonant mode. An implication is that the continuously ringing Lamb wave global normal modes that have been seen in analyses of long observational records ought to have lower frequency internal Pekeris mode counterparts, a prediction that we confirm though analysis of 67 years of hourly global reanalysis data.
Contribution of Gravity Waves to Universal Vertical Wavenumber (similar to m(-3)) Spectra Revealed by a Gravity-Wave-Permitting General Circulation Model Peer-reviewed

Haruka Okui, Kaoru Sato, Shingo Watanabe

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　127　(10)　2022/05

DOI： 10.1029/2021JD036222 　

ISSN： 2169-897X

eISSN： 2169-8996
Dynamical Characteristics of Quasi-6-day Rossby Waves and Gravity Waves during the Stratospheric Sudden Warming in the Southern Hemisphere in 2019

Yuichi Minamihara, Kaoru Sato, Shingo Watanabe

2022/04/09
Publisher: Wiley
DOI： 10.1002/essoar.10511060.1 　
An update on the 4D-LETKF data assimilation system for the whole neutral atmosphere

Dai Koshin, Kaoru Sato, Masashi Kohma, Shingo Watanabe

Geoscientific Model Development　15　(5)　2293-2307　2022/03/17
Publisher: Copernicus GmbH
DOI： 10.5194/gmd-15-2293-2022 　

eISSN： 1991-9603

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Abstract. The four-dimensional local ensemble transform Kalmanfilter (4D-LETKF) data assimilation system for the whole neutral atmosphereis updated to better represent disturbances with wave periods shorter than 1 d in the mesosphere and lower thermosphere (MLT) region. First,incremental analysis update (IAU) filtering is introduced to reduce thegeneration of spurious waves arising from the insertion of the analysisupdates. The IAU is better than other filtering methods, and also iscommonly used for middle atmospheric data assimilation. Second, the order ofhorizontal diffusion in the forecast model is changed to reproduce the morerealistic tidal amplitudes that were observed by satellites. Third, theSounding of the Atmosphere using Broadband Emission Radiometry (SABER) andSpecial Sensor Microwave Imager/Sounder (SSMIS) observations in thestratosphere and mesosphere also are assimilated. The performance of theresultant analyses is evaluated by comparing them with the mesospheric windsfrom meteor radars, which are not assimilated. The representation ofassimilation products is greatly improved not only for the zonal mean fieldbut also for short-period and/or horizontally small-scale disturbances.
Intercomparison of middle atmospheric meteorological analyses for the Northern Hemisphere winter 2009–2010 Peer-reviewed

John P. McCormack, V. Lynn Harvey, Cora E. Randall, Nicholas Pedatella, Dai Koshin, Kaoru Sato, Lawrence Coy, Shingo Watanabe, Fabrizio Sassi, Laura A. Hol

Atmospheric Chemistry and Physics　21　(23)　17577-17605　2021/12/03
Publisher: Copernicus {GmbH}
DOI： 10.5194/acp-21-17577-2021 　

ISSN： 1680-7324

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<jats:p>Abstract. Detailed meteorological analyses based on observations extending through the middle atmosphere (∼ 15 to 100 km altitude) can provide key information to whole atmosphere modeling systems regarding the physical mechanisms linking day-to-day changes in ionospheric electron density to meteorological variability near the Earth's surface. However, the extent to which independent middle atmosphere analyses differ in their representation of wave-induced coupling to the ionosphere is unclear. To begin to address this issue, we present the first intercomparison among four such analyses, JAGUAR-DAS, MERRA-2, NAVGEM-HA, and WACCMX+DART, focusing on the Northern Hemisphere (NH) 2009–2010 winter, which includes a major sudden stratospheric warming (SSW). This intercomparison examines the altitude, latitude, and time dependences of zonal mean zonal winds and temperatures among these four analyses over the 1 December 2009 to 31 March 2010 period, as well as latitude and altitude dependences of monthly mean amplitudes of the diurnal and semidiurnal migrating solar tides, the eastward-propagating diurnal zonal wave number 3 nonmigrating tide, and traveling planetary waves associated with the quasi-5 d and quasi-2 d Rossby modes. Our results show generally good agreement among the four analyses up to the stratopause (∼ 50 km altitude). Large discrepancies begin to emerge in the mesosphere and lower thermosphere owing to (1) differences in the types of satellite data assimilated by each system and (2) differences in the details of the global atmospheric models used by each analysis system. The results of this intercomparison provide initial estimates of uncertainty in analyses commonly used to constrain middle atmospheric meteorological variability in whole atmosphere model simulations. </jats:p>
The Brewer–Dobson circulation in CMIP6

Marta Abalos, Natalia Calvo, Samuel Benito-Barca, Hella Garny, Steven C. Hardiman, Pu Lin, Martin B. Andrews, Neal Butchart, Rolando Garcia, Clara Orbe, David Saint-Martin, Shingo Watanabe, Kohei Yoshida

Atmospheric Chemistry and Physics　21　(17)　13571-13591　2021/09/10
Publisher: Copernicus GmbH
DOI： 10.5194/acp-21-13571-2021 　

eISSN： 1680-7324

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Abstract. The Brewer–Dobson circulation (BDC) is a key feature of the stratosphere that models need to accurately represent in order to simulate surface climate variability and change adequately. For the first time, the Climate Model Intercomparison Project includes in its phase 6 (CMIP6) a set of diagnostics that allow for careful evaluation of the BDC. Here, the BDC is evaluated against observations and reanalyses using historical simulations. CMIP6 results confirm the well-known inconsistency in the sign of BDC trends between observations and models in the middle and upper stratosphere. Nevertheless, the large uncertainty in the observational trend estimates opens the door to compatibility. In particular, when accounting for the limited sampling of the observations, model and observational trend error bars overlap in 40 % of the simulations with available output. The increasing CO2 simulations feature an acceleration of the BDC but reveal a large spread in the middle-to-upper stratospheric trends, possibly related to the parameterized gravity wave forcing. The very close connection between the shallow branch of the residual circulation and surface temperature is highlighted, which is absent in the deep branch. The trends in mean age of air are shown to be more robust throughout the stratosphere than those in the residual circulation.
Formation of a Mesospheric Inversion Layer and the Subsequent Elevated Stratopause Associated With the Major Stratospheric Sudden Warming in 2018/19

Haruka Okui, Kaoru Sato, Dai Koshin, Shingo Watanabe

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　126　(18)　2021/09

DOI： 10.1029/2021JD034681 　

ISSN： 2169-897X

eISSN： 2169-8996
Description of MIROC6 AGCM

Ando, Taigo, Higuchi, Taro, Hotta, Haruka, Iwakiri, Tomoki, Jinno, Takuya, Kino, Kanon, Takano, Yuki, Toda, Masaki, Yamazaki, Kazuya, Chikira, Minoru, Kodama, Takanori, Michibata, Takuro, Miura, Hiroaki, Nitta, Tomoko, Ogura, Tomoo, Saito, Fuyuki, Sekiguchi, Miho, Suzuki, Tatsuo, Suzuki, Kentaroh, Tatebe, Hiroaki, Watanabe, Masahiro, Watanabe, Shingo, Yoshimura, Kei

2021/05/31
Publisher: Division of Climate System Research, Atmosphere and Ocean Research Institute, The University of Tokyo
DOI： 10.15083/0002000180 　
Teleconnections of the quasi‐biennial oscillation in a multi‐model ensemble of QBO ‐resolving models Peer-reviewed

James A. Anstey, Isla R. Simpson, Jadwiga H. Richter, Hiroaki Naoe, Masakazu Taguchi, Federico Serva, Lesley J. Gray, Neal Butchart, Kevin Hamilton, Scott Osprey, Omar Bellprat, Peter Braesicke, Andrew C. Bushell, Chiara Cagnazzo, Chih‐Chieh Chen, Hye‐Yeong Chun, Rolando R. Garcia, Laura Holt, Yoshio Kawatani, Tobias Kerzenmacher, Young‐Ha Kim, Francois Lott, Charles McLandress, John Scinocca, Timothy N. Stockdale, Stefan Versick, Shingo Watanabe, Kohei Yoshida, Seiji Yukimoto

Quarterly Journal of the Royal Meteorological Society　2021/05/04
Publisher: Wiley
DOI： 10.1002/qj.4048 　

ISSN： 0035-9009
Formation of the double stratopause and elevated stratopause associated with the major stratospheric sudden warming in 2018/19

Haruka Okui, Kaoru Sato, Dai Koshin, Shingo Watanabe

2021/02/17

DOI： 10.1002/essoar.10506257.1 　
Emissions from the Oil and Gas Sectors, Coal Mining and Ruminant Farming Drive Methane Growth over the Past Three Decades

Naveen CHANDRA, Prabir K. PATRA, Jagat S. H. BISHT, Akihiko ITO, Taku UMEZAWA, Nobuko SAIGUSA, Shinji MORIMOTO, Shuji AOKI, Greet JANSSENS-MAENHOUT, Ryo FUJITA, Masayuki TAKIGAWA, Shingo WATANABE, Naoko SAITOH, Josep G. CANADELL

Journal of the Meteorological Society of Japan. Ser. II　99　(2)　309-337　2021
Publisher: Meteorological Society of Japan
DOI： 10.2151/jmsj.2021-015 　

ISSN： 0026-1165

eISSN： 2186-9057
Two decades of Earth system modeling with an emphasis on Model for Interdisciplinary Research on Climate (MIROC)

Michio Kawamiya, Tomohiro Hajima, Kaoru Tachiiri, Shingo Watanabe, Tokuta Yokohata

Progress in Earth and Planetary Science　7　(1)　2020/12
Publisher: Springer Science and Business Media LLC
DOI： 10.1186/s40645-020-00369-5 　

eISSN： 2197-4284

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<title>Abstract</title> The past 20 years of research using Earth system models (ESMs) is reviewed with an emphasis on results from the ESM based on MIROC (Model for Interdisciplinary Research on Climate) developed in Japan. Earth system models are climate models incorporating biogeochemical processes such as the carbon cycle. The development of ESM was triggered by studies of the feedback between climate change and the carbon cycle. State-of-the-art ESMs are much more realistic than the first ESMs. They now include various biogeochemical processes other than carbon, such as atmospheric chemistry and the nitrogen and iron cycles as well as nutrient transport by atmospheric dust and rivers. They are used to address many practical issues, such as evaluating the amount of carbon dioxide emissions that is consistent with climate change mitigation targets, and are indispensable tools for the development of climate change mitigation policies. Novel, ambitious attempts to use ESMs include coupling socioeconomics with Earth systems, and projecting the carbon cycle on decadal timescales. Development of ESMs requires ongoing integration of multiple aspects of climate science. Emerging applications of ESMs can bring forth meaningful insights, and should be directed toward expanding connections with fields outside climate science, e.g., socioeconomics.
Application of Deep Learning to Estimate Atmospheric Gravity Wave Parameters in Reanalysis Data Sets

D. Matsuoka, S. Watanabe, K. Sato, S. Kawazoe, W. Yu, S. Easterbrook

Geophysical Research Letters　47　(19)　2020/10/16
Publisher: American Geophysical Union (AGU)
DOI： 10.1029/2020gl089436 　

ISSN： 0094-8276

eISSN： 1944-8007
Prediction of the quasi‐biennial oscillation with a multi‐model ensemble of QBO ‐resolving models Peer-reviewed

Timothy N. Stockdale, Young‐Ha Kim, James A. Anstey, Froila M. Palmeiro, Neal Butchart, Adam A. Scaife, Martin Andrews, Andrew C. Bushell, Mikhail Dobrynin, Javier Garcia‐Serrano, Kevin Hamilton, Yoshio Kawatani, Francois Lott, Charles McLandress, Hiroaki Naoe, Scott Osprey, Holger Pohlmann, John Scinocca, Shingo Watanabe, Kohei Yoshida, Seiji Yukimoto

Quarterly Journal of the Royal Meteorological Society　2020/10
Publisher: Wiley
DOI： 10.1002/qj.3919 　

ISSN： 0035-9009
Robust Enhancement of Tropical Convective Activity by the 2019 Antarctic Sudden Stratospheric Warming Peer-reviewed

S. Noguchi, Y. Kuroda, K. Kodera, S. Watanabe

Geophysical Research Letters　47　(15)　2020/07/17
Publisher: American Geophysical Union (AGU)
DOI： 10.1029/2020gl088743 　

ISSN： 0094-8276

eISSN： 1944-8007
An evaluation of tropical waves and wave forcing of the QBO in the QBOi models

Laura A. Holt, François Lott, Rolando R. Garcia, George N. Kiladis, Yuan‐Ming Cheng, James A. Anstey, Peter Braesicke, Andrew C. Bushell, Neal Butchart, Chiara Cagnazzo, Chih‐Chieh Chen, Hye‐Yeong Chun, Yoshio Kawatani, Tobias Kerzenmacher, Young‐Ha Kim, Charles McLandress, Hiroaki Naoe, Scott Osprey, Jadwiga H. Richter, Adam A. Scaife, John Scinocca, Federico Serva, Stefan Versick, Shingo Watanabe, Kohei Yoshida, Seiji Yukimoto

Quarterly Journal of the Royal Meteorological Society　2020/07/15
Publisher: Wiley
DOI： 10.1002/qj.3827 　

ISSN： 0035-9009

eISSN： 1477-870X
An ensemble Kalman filter data assimilation system for the whole neutral atmosphere

Dai Koshin, Kaoru Sato, Kazuyuki Miyazaki, Shingo Watanabe

Geoscientific Model Development　13　(7)　3145-3177　2020/07/13
Publisher: Copernicus GmbH
DOI： 10.5194/gmd-13-3145-2020 　

eISSN： 1991-9603

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Abstract. A data assimilation system with a four-dimensional local ensemble transform Kalman filter (4D-LETKF) is developed to make a new analysis dataset for the atmosphere up to the lower thermosphere using the Japanese Atmospherics General Circulation model for Upper Atmosphere Research. The time period from 10 January to 20 February 2017, when an international radar network observation campaign was performed, is focused on. The model resolution is T42L124, which can resolve phenomena at synoptic and larger scales. A conventional observation dataset provided by the National Centers for Environmental Prediction, PREPBUFR, and satellite temperature data from the Aura Microwave Limb Sounder (MLS) for the stratosphere and mesosphere are assimilated. First, the performance of the forecast model is improved by modifying the vertical profile of the horizontal diffusion coefficient and modifying the source intensity in the non-orographic gravity wave parameterization by comparing it with radar wind observations in the mesosphere. Second, the MLS observational bias is estimated as a function of the month and latitude and removed before the data assimilation. Third, data assimilation parameters, such as the degree of gross error check, localization length, inflation factor, and assimilation window, are optimized based on a series of sensitivity tests. The effect of increasing the ensemble member size is also examined. The obtained global data are evaluated by comparison with the Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2) reanalysis data covering pressure levels up to 0.1 hPa and by the radar mesospheric observations, which are not assimilated.
A development of reduction scenarios of the short-lived climate pollutants (SLCPs) for mitigating global warming and environmental problems

Teruyuki Nakajima, Toshimasa Ohara, Toshihiko Masui, Toshihiko Takemura, Kei Yoshimura, Daisuke Goto, Tatsuya Hanaoka, Syuichi Itahashi, Gakuji Kurata, Jun-ichi Kurokawa, Takashi Maki, Yuji Masutomi, Makiko Nakata, Tomoko Nitta, Xerxes Seposo, Kengo Sudo, Chieko Suzuki, Kentaroh Suzuki, Haruo Tsuruta, Kayo Ueda, Shingo Watanabe, Yong Yu, Keiya Yumimoto, Shuyun Zhao

PROGRESS IN EARTH AND PLANETARY SCIENCE　7　(1)　2020/07

DOI： 10.1186/s40645-020-00351-1 　

ISSN： 2197-4284
Weakening of the Extratropical Storm Tracks in Solar Geoengineering Scenarios

Charles G. Gertler, Paul A. O'Gorman, Ben Kravitz, John C. Moore, Steven J. Phipps, Shingo Watanabe

Geophysical Research Letters　47　(11)　2020/06/16
Publisher: Blackwell Publishing Ltd
DOI： 10.1029/2020GL087348 　

ISSN： 1944-8007 0094-8276
Connection between Antarctic Ozone and Climate: Interannual Precipitation Changes in the Southern Hemisphere

Alessandro Damiani, Raul R. Cordero, Pedro J. Llanillo, Sarah Feron, Juan P. Boisier, Rene Garreaud, Roberto Rondanelli, Hitoshi Irie, Shingo Watanabe

ATMOSPHERE　11　(6)　2020/06

DOI： 10.3390/atmos11060579 　

eISSN： 2073-4433
Development of the MIROC-ES2L Earth system model and the evaluation of biogeochemical processes and feedbacks Peer-reviewed

Tomohiro Hajima, Michio Watanabe, Akitomo Yamamoto, Hiroaki Tatebe, Maki A. Noguchi, Manabu Abe, Rumi Ohgaito, Akinori Ito, Dai Yamazaki, Hideki Okajima, Akihiko Ito, Kumiko Takata, Koji Ogochi, Shingo Watanabe, Michio Kawamiya

Geoscientific Model Development　13　(5)　2197-2244　2020/05/13

DOI： 10.5194/gmd-13-2197-2020 　

ISSN： 1991-959X

eISSN： 1991-9603
Uncertainty in the Response of Sudden Stratospheric Warmings and Stratosphere‐Troposphere Coupling to Quadrupled CO 2 Concentrations in CMIP6 Models

B. Ayarzagüena, A. J. Charlton‐Perez, A. H. Butler, P. Hitchcock, I. R. Simpson, L. M. Polvani, N. Butchart, E. P. Gerber, L. Gray, B. Hassler, P. Lin, F. Lott, E. Manzini, R. Mizuta, C. Orbe, S. Osprey, D. Saint‐Martin, M. Sigmond, M. Taguchi, E. M. Volodin, S. Watanabe

Journal of Geophysical Research: Atmospheres　125　(6)　2020/03/27
Publisher: American Geophysical Union (AGU)
DOI： 10.1029/2019jd032345 　

ISSN： 2169-897X

eISSN： 2169-8996
Evaluation of the Quasi‐Biennial Oscillation in global climate models for the SPARC QBO‐initiative

A. C. Bushell, J. A. Anstey, N. Butchart, Y. Kawatani, S. M. Osprey, J. H. Richter, F. Serva, P. Braesicke, C. Cagnazzo, C.‐C. Chen, H.‐Y. Chun, R. R. Garcia, L. J. Gray, K. Hamilton, T. Kerzenmacher, Y.‐H. Kim, F. Lott, C. McLandress, H. Naoe, J. Scinocca, A. K. Smith, T. N. Stockdale, S. Versick, S. Watanabe, K. Yoshida, S. Yukimoto

Quarterly Journal of the Royal Meteorological Society　2020/03/14
Publisher: Wiley
DOI： 10.1002/qj.3765 　

ISSN： 0035-9009

eISSN： 1477-870X
Development of a system for efficient content-based retrieval to analyze large volumes of climate data

Yujin Nakagawa, Yosuke Onoue, Shitnaro Kawahara, Fumiaki Araki, Koji Koyamada, Daisuke Matsuoka, Yoichi Ishikawa, Mikiko Fujita, Shiori Sugimoto, Yasuko Okada, Sho Kawazoe, Shingo Watanabe, Masayoshi Ishii, Ryo Mizuta, Akihiko Murata, Hiroaki Kawase

PROGRESS IN EARTH AND PLANETARY SCIENCE　7　(1)　2020/02

DOI： 10.1186/s40645-019-0315-9 　

ISSN： 2197-4284
Response of the Quasi-Biennial Oscillation to a warming climate in global climate models Peer-reviewed

Jadwiga H. Richter, Neal Butchart, Yoshio Kawatani, Andrew C. Bushell, Laura Holt, Federico Serva, James Anstey, Isla R. Simpson, Scott Osprey, Kevin Hamilton, Peter Braesicke, Chiara Cagnazzo, Chih-Chieh Chen, Rolando R. Garcia, Lesley J. Gray, Tobias Kerzenmacher, Francois Lott, Charles McLandress, Hiroaki Naoe, John Scinocca, Timothy N. Stockdale, Stefan Versick, Shingo Watanabe, Kohei Yoshida, Seiji Yukimoto

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY　2020/02

DOI： 10.1002/qj.3749 　

ISSN： 0035-9009

eISSN： 1477-870X
Projected Changes of Extremely Cool Summer Days over Northeastern Japan Simulated by 20 km-mesh Large Ensemble Experiment

Sho KAWAZOE, Mikiko FUJITA, Shiori SUGIMOTO, Yasuko OKADA, Shingo WATANABE

Journal of the Meteorological Society of Japan. Ser. II　98　(6)　1305-1319　2020
Publisher: Meteorological Society of Japan
DOI： 10.2151/jmsj.2020-067 　

ISSN： 0026-1165

eISSN： 2186-9057
Climate Change over East Asia in Decreasing Anthropogenic Aerosol

NAKATA Makiko, WATANABE Shingo, G. TAKAHASHI Hiroshi

Earozoru Kenkyu　35　(2)　110-117　2020
Publisher: Japan Association of Aerosol Science and Technology
DOI： 10.11203/jar.35.110 　

ISSN： 0912-2834

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<p> Aerosols directly and indirectly modify cloud properties and consequently have various effects on the climate. They possess significant potential to change circulation fields through changes in the radiation budget. We used earth system model simulations to estimate the effects of anthropogenic aerosols on the climate over East Asia in the future, where the emission of anthropogenic aerosols is expected to decrease owing to measures being taken to control air pollution. Anthropogenic aerosols have negative effects on surface temperature and precipitation and positive effects on cloud cover; these effects of aerosols become slightly weaker with decreasing anthropogenic aerosol emissions. Thus, a reduction in aerosols may weaken their cooling effect. Because of that, measures for the emission control of aerosols may promote global warming and precipitation over East Asia. In this study, the rate of change in temperature and that in precipitation caused by increasing of greenhouse gases is estimated to be 0.35 K/10-year and 0.69%/10-year, respectively, over East Asia. On the other hand, combining aerosol decreasing and the greenhouse gas effect just mentioned provides the increasing rate with 0.46 K/10-year in temperature and 2.6%/10-year in precipitation. The results suggest that decreasing of anthropogenic aerosols contributes to temperature rising and increased precipitation. </p>
The equatorial stratospheric semiannual oscillation and time‐mean winds in QBOi models Peer-reviewed

Smith AK, Holt LA, Garcia RR, Anstey JA, Serva F, Butchart N, Osprey S, Bushell AC, Kawatani Y, Kim Y-H, Lott F, Braesicke P, Cagnazzo C, Chen C-C, Chun H-Y, Gray L, Kerzenmacher T, Naoe H, Richter J, Versick S, Schenzinger V, Watanabe S, Yoshida K

Quarterly Journal of the Royal Meteorological Society　n/a　(n/a)　2019/10
Publisher: Wiley
DOI： 10.1002/qj.3690 　

ISSN： 1477-870X 0035-9009

eISSN： 1477-870X
Description and basic evaluation of simulated mean state, internal variability, and climate sensitivity in MIROC6 Peer-reviewed

Tatebe Hiroaki, Ogura Tomoo, Nitta Tomoko, Komuro Yoshiki, Ogochi Koji, Takemura Toshihiko, Sudo Kengo, Sekiguchi Miho, Abe Manabu, Saito Fuyuki, Chikira Minoru, Watanabe Shingo, Mori Masato, Hirota Nagio, Kawatani Yoshio, Mochizuki Takashi, Yoshimura Kei, Takata Kumiko, O'ishi Ryouta, Yamazaki Dai, Suzuki Tatsuo, Kurogi Masao, Kataoka Takahito, Watanabe Masahiro, Kimoto Masahide

GEOSCIENTIFIC MODEL DEVELOPMENT　12　(7)　2727-2765　2019/07/08

DOI： 10.5194/gmd-12-2727-2019 　

ISSN： 1991-959X

eISSN： 1991-9603
Frequency Change of Clear-Air Turbulence over the North Pacific under 2 K Global Warming - Ensemble Projections Using a 60-km Atmospheric General Circulation Model Peer-reviewed

Shingo Watanabe, Mikiko Fujita, Sho Kawazoe, Shiori Sugimoto, Yasuko Okada, Ryo Mizuta, Masayoshi Ishii

JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN　97　(3)　757-771　2019/06

DOI： 10.2151/jmsj.2019-038 　

ISSN： 0026-1165

eISSN： 2186-9057
The Effects of a Well-Resolved Stratosphere on the Simulated Boreal Winter Circulation in a Climate Model

Yoshio Kawatani, Kevin Hamilton, Lesley J. Gray, Scott M. Osprey, Shingo Watanabe, Yousuke Yamashita

Journal of the Atmospheric Sciences　76　(5)　1203-1226　2019/05/01

DOI： 10.1175/JAS-D-18-0206.1 　
JAMSTEC Model Intercomparision Project (JMIP) Peer-reviewed

Chihiro Kodama, Akira Kuwano-Yoshida, Shingo Watanabe, Takeshi Doi, Hiroki Kashimura, Tomoe Nasuno

JAMSTEC Report of Research and Development　28　5-34　2019/04

DOI： 10.5918/jamstecr.28.5 　

ISSN： 2186-358X 1880-1153
Precipitation Changes in a Climate With 2‐K Surface Warming From Large Ensemble Simulations Using 60‐km Global and 20‐km Regional Atmospheric Models Peer-reviewed

M. Fujita, R. Mizuta, M. Ishii, H. Endo, T. Sato, Y. Okada, S. Kawazoe, S. Sugimoto, K. Ishihara, S. Watanabe

Geophysical Research Letters　46　(1)　435-442　2019/01/16

DOI： 10.1029/2018GL079885 　
Greenland Ice Sheet Response to Stratospheric Aerosol Injection Geoengineering

Shingo Watanabe

Earth's Future　2019

DOI： 10.1029/2019EF001393 　
ENSO modulation of the QBO: Results from MIROC models with and without non-orographic gravity wave parameterization Peer-reviewed

Kawatani, Yoshio, Hamilton, Kevin, Sato, Kaoru, Dunkerton, Timothy J, Watanabe, Shingo, Kikuchi, Kazuyoshi

Journal of the Atmospheric Sciences　76　(2019)　3893-3917　2019

DOI： 10.1175/jas-d-19-0163.1 　

ISSN： 1520-0469
Effect of high dust amount on surface temperature during the Last Glacial Maximum: a modelling study using MIROC-ESM Peer-reviewed

Ohgaito Rumi, Abe-Ouchi Ayako, O'ishi Ryouta, Takemura Toshihiko, Ito Akinori, Hajima Tomohiro, Watanabe Shingo, Kawamiya Michio

Climate of the Past　14　(11)　1565-1581　2018/11

DOI： 10.5194/cp-14-1565-2018 　

ISSN： 1814-9324

eISSN： 1814-9332
The climate effects of increasing ocean albedo: An idealized representation of solar geoengineering

Ben Kravitz, Philip J. Rasch, Hailong Wang, Alan Robock, Corey Gabriel, Olivier Boucher, Jason N.S. Cole, Jim Haywood, Duoying Ji, Andy Jones, Andrew Lenton, John C. Moore, Helene Muri, Ulrike Niemeier, Steven Phipps, Hauke Schmidt, Shingo Watanabe, Shuting Yang, Jin-Ho Yoon

Atmospheric Chemistry and Physics　18　(17)　13097-13113　2018/09/12
Publisher: Copernicus GmbH
DOI： 10.5194/acp-18-13097-2018 　

ISSN： 1680-7324 1680-7316
Response of the atmospheric hydrological cycle over the tropical Asian monsoon regions to anthropogenic aerosols and its seasonality Peer-reviewed

Hiroshi G. Takahashi, Shingo Watanabe, Makiko Nakata, Toshihiko Takemura

PROGRESS IN EARTH AND PLANETARY SCIENCE　5　2018/08

DOI： 10.1186/s40645-018-0197-2 　

ISSN： 2197-4284
Extreme temperature and precipitation response to solar dimming and stratospheric aerosol geoengineering Peer-reviewed

Ji Duoying, Fang Songsong, Curry Charles L, Kashimura Hiroki, Watanabe Shingo, Cole Jason N. S, Lenton Andrew, Muri Helene, Kravitz Ben, Moore John C

Atmospheric Chemistry and Physics　18　(14)　10133-10156　2018/06

DOI： 10.5194/ACP-18-10133-2018 　

ISSN： 1680-7316
First Successful Hindcasts of the 2016 Disruption of the Stratospheric Quasi-biennial Oscillation Peer-reviewed

S. Watanabe, K. Hamilton, S. Osprey, Y. Kawatani, E. Nishimoto

Geophysical Research Letters　45　(3)　1602-1610　2018/02/16
Publisher: Blackwell Publishing Ltd
DOI： 10.1002/2017GL076406 　

ISSN： 1944-8007 0094-8276
First Successful Hindcasts of the 2016 Disruption of the Stratospheric Quasi-biennial Oscillation Peer-reviewed

S. Watanabe, K. Hamilton, S. Osprey, Y. Kawatani, E. Nishimoto

Geophysical Research Letters　45　(3)　1602-1610　2018/02/16
Publisher: Blackwell Publishing Ltd
DOI： 10.1002/2017GL076406 　

ISSN： 1944-8007 0094-8276
Regional-scale data assimilation of a terrestrial ecosystem model: leaf phenology parameters are dependent on local climatic conditions Peer-reviewed

Ise T, S. Ikeda, S. Watanabe, K. Ichii

Frontiers in Environmental Science　6　2018

DOI： 10.3389/fenvs.2018.00095 　

eISSN： 2296-665X
Response to marine cloud brightening in a multi-model ensemble Peer-reviewed

Camilla W. Stjern, Helene Muri, Lars Ahlm, Olivier Boucher, Jason N. S. Cole, Duoying Ji, Andy Jones, Jim Haywood, Ben Kravitz, Andrew Lenton, John C. Moore, Ulrike Niemeier, Steven J. Phipps, Hauke Schmidt, Shingo Watanabe, Jon Egill Kristjansson

ATMOSPHERIC CHEMISTRY AND PHYSICS　18　(2)　621-634　2018/01

DOI： 10.5194/acp-18-621-2018 　

ISSN： 1680-7316

eISSN： 1680-7324
Improved Chemical Tracer Simulation by MIROC4.0-based Atmospheric Chemistry-Transport Model (MIROC4-ACTM) Peer-reviewed

Prabir K. Patra, Masayuki Takigawa, Shingo Watanabe, Naveen Chandra, Kentaro Ishijima, Yousuke Yamashita

SOLA　14　(0)　91　2018

DOI： 10.2151/sola.2018-016 　

ISSN： 1349-6476
Impact of Spatial Resolution on Simulated Consecutive Dry Days and Near-Surface Temperature over the Central Mountains in Japan Peer-reviewed

Shiori Sugimoto, Rui Ito, Koji Dairaku, Hiroaki Kawase, Hidetaka Sasaki, Shingo Watanabe, Yasuko Okada, Sho Kawazoe, Takeshi Yamazaki, Takahiro Sasai

SOLA　14　46-51　2018

DOI： 10.2151/sola.2018-008 　

ISSN： 1349-6476
Next steps in geoengineering scenario research: limited deployment scenarios and beyond Peer-reviewed

Masahiro Sugiyama, Yosuke Arino, Takanobu Kosugi, Atsushi Kurosawa, Shingo Watanabe

CLIMATE POLICY　18　(6)　681-689　2018

DOI： 10.1080/14693062.2017.1323721 　

ISSN： 1469-3062

eISSN： 1752-7457
Overview of experiment design and comparison of models participating in phase 1 of the SPARC Quasi-Biennial Oscillation initiative (QBOi) Peer-reviewed

Shingo Watanabe

Geoscientific Model Development　1-35　2018

DOI： 10.5194/GMD-11-1009-2018 　

ISSN： 1991-962X
Vegetation masking effect on future warming and snow albedo feedback in a boreal forest region of northern Eurasia according to MIROC-ESM Peer-reviewed

Manabu Abe, Kumiko Takata, Michio Kawamiya, Shingo Watanabe

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　122　(17)　9245-9261　2017/09

DOI： 10.1002/2017JD026957 　

ISSN： 2169-897X

eISSN： 2169-8996
Response to marine cloud brightening in a multi-model ensemble Peer-reviewed

Camilla W. Stjern, Helene Muri, Lars Ahlm, Olivier Boucher, Jason N. S. Cole, Duoying Ji, Andy Jones, Jim Haywood, Ben Kravitz, Andrew Lenton, John C. Moore, Ulrike Niemeier, Steven J. Phipps, Hauke Schmidt, Shingo Watanabe, Jón Egill Kristjánsson

Atmospheric Chemistry and Physics Discussions　1-20　2017/07
Publisher: Copernicus {GmbH}
DOI： 10.5194/acp-2017-629 　

ISSN： 1680-7375
Next steps in geoengineering scenario research: limited deployment scenarios and beyond Peer-reviewed

Masahiro Sugiyama, Yosuke Arino, Takanobu Kosugi, Atsushi Kurosawa, Shingo Watanabe

Climate Policy　1-9　2017/06/08
Publisher: Informa {UK} Limited
DOI： 10.1080/14693062.2017.1323721 　

ISSN： 1469-3062
Shortwave radiative forcing, rapid adjustment, and feedback to the surface by sulfate geoengineering: Analysis of the Geoengineering Model Intercomparison Project G4 scenario Peer-reviewed

Hiroki Kashimura, Manabu Abe, Shingo Watanabe, Takashi Sekiya, Duoying Ji, John C. Moore, Jason N. S. Cole, Ben Kravitz

Atmospheric Chemistry and Physics　17　(5)　3339-3356　2017/03/08
Publisher: Copernicus GmbH
DOI： 10.5194/acp-17-3339-2017 　

ISSN： 1680-7324 1680-7316
Shortwave radiative forcing, rapid adjustment, and feedback to the surface by sulfate geoengineering: analysis of the Geoengineering Model Intercomparison Project G4 scenario Peer-reviewed

Hiroki Kashimura, Manabu Abe, Shingo Watanabe, Takashi Sekiya, Duoying Ji, John C. Moore, Jason N. S. Cole, Ben Kravitz

ATMOSPHERIC CHEMISTRY AND PHYSICS　17　(5)　3339-3356　2017/03

DOI： 10.5194/acp-17-3339-2017 　

ISSN： 1680-7316

eISSN： 1680-7324
Impact of the GeoMIP G1 sunshade geoengineering experiment on the Atlantic meridional overturning circulation Peer-reviewed

Yu Hong, John C. Moore, Svetlana Jevrejeva, Duoying Ji, Steven J. Phipps, Andrew Lenton, Simone Tilmes, Shingo Watanabe, Liyun Zhao

ENVIRONMENTAL RESEARCH LETTERS　12　(3)　034009　2017/03

DOI： 10.1088/1748-9326/aa5fb8 　

ISSN： 1748-9326
Transdisciplinary co-design of scientific research agendas: 40 research questions for socially relevant climate engineering research Peer-reviewed

Masahiro Sugiyama, Shinichiro Asayama, Takanobu Kosugi, Atsushi Ishii, Seita Emori, Jiro Adachi, Keigo Akimoto, Masatomo Fujiwara, Tomoko Hasegawa, Yasushi Hibi, Kimiko Hirata, Toru Ishii, Takeshi Kaburagi, Yuki Kita, Shigeki Kobayashi, Atsushi Kurosawa, Manabu Kuwata, Kooiti Masuda, Makoto Mitsui, Taku Miyata, Hiroshi Mizutani, Sumie Nakayama, Kazuyo Oyamada, Takaaki Sashida, Miho Sekiguchi, Kiyoshi Takahashi, Yukari Takamura, Junichi Taki, Taketoshi Taniguchi, Hiroyuki Tezuka, Takahiro Ueno, Shingo Watanabe, Rie Watanabe, Naoyuki Yamagishi, Go Yoshizawa

SUSTAINABILITY SCIENCE　12　(1)　31-44　2017/01

DOI： 10.1007/s11625-016-0376-2 　

ISSN： 1862-4065

eISSN： 1862-4057
Overview of experiment design and comparison of modelsparticipating in phase 1 of the SPARC Quasi-Biennial Oscillationinitiative (QBOi) Peer-reviewed

Neal Butchart, James A. Anstey, Kevin Hamilton, Scott Osprey, Charles McLandress, Andrew C. Bushell, Yoshio Kawatani, Young-Ha Kim, Francois Lott, John Scinocca, Tim Stockdale, Omar Bellprat, Peter Braesicke, Chiara Cagnazzo, Chih-Chieh Chen, Hye-Yeong Chun, Mikhail Dobrynin, Rolando R. Garcia, Javier Garcia-Serrano, Lesley J. Gray, Laura Holt, Tobias Kerzenmacher, Hiroaki Naoe, Holger Pohlmann, Jadwiga H. Richter, Adam A. Scaife, Verena Schenzinger, Federico Serva, Stefan Versick, Shingo Watanabe, Kohei Yoshida, Seiji Yukimoto

Geoscientific Model Development Discussions　1-35　2017

DOI： 10.5194/gmd-2017-187 　
Energetic particle precipitation: A major driver of the ozone budget in the Antarctic upper stratosphere Peer-reviewed

Alessandro Damiani, Bernd Funke, Manuel Lopez-Puertas, Michelle L. Santee, Raul R. Cordero, Shingo Watanabe

GEOPHYSICAL RESEARCH LETTERS　43　(7)　3554-3562　2016/04

DOI： 10.1002/2016GL068279 　

ISSN： 0094-8276

eISSN： 1944-8007
Southern Hemisphere Extratropical Gravity Wave Sources and Intermittency Revealed by a Middle-Atmosphere General Circulation Model Peer-reviewed

Simon P. Alexander, Kaoru Sato, Shingo Watanabe, Yoshio Kawatani, Damian J. Murphy

JOURNAL OF THE ATMOSPHERIC SCIENCES　73　(3)　1335-1349　2016/03

DOI： 10.1175/JAS-D-15-0149.1 　

ISSN： 0022-4928

eISSN： 1520-0469
The impact of equilibrating hemispheric albedos on tropical performance in the HadGEM2-ES coupled climate model Peer-reviewed

Jim M. Haywood, Andy Jones, Nick Dunstone, Sean Milton, Michael Vellinga, Alejandro Bodas-Salcedo, Matt Hawcroft, Ben Kravitz, Jason Cole, Shingo Watanabe, Graeme Stephens

GEOPHYSICAL RESEARCH LETTERS　43　(1)　395-403　2016/01

DOI： 10.1002/2015GL066903 　

ISSN： 0094-8276

eISSN： 1944-8007
Changes in the UV Lambertian equivalent reflectivity in the Southern Ocean: Influence of sea ice and cloudiness Peer-reviewed

A. Damiani, R. R. Cordero, J. Carrasco, S. Watanabe, M. Kawamiya, V. E. Lagun

REMOTE SENSING OF ENVIRONMENT　169　75-92　2015/11

DOI： 10.1016/j.rse.2015.07.030 　

ISSN： 0034-4257

eISSN： 1879-0704
Atlantic hurricane surge response to geoengineering Peer-reviewed

John C. Moore, Aslak Grinsted, Xiaoran Guo, Xiaoyong Yu, Svetlana Jevrejeva, Annette Rinke, Xuefeng Cui, Ben Kravitz, Andrew Lenton, Shingo Watanabe, Duoying Ji

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA　112　(45)　13794-13799　2015/11

DOI： 10.1073/pnas.1510530112 　

ISSN： 0027-8424
Examination of a climate stabilization pathway via zero-emissions using Earth system models Peer-reviewed

Daisuke Nohara, J. Tsutsui, S. Watanabe, K. Tachiiri, T. Hajima, H. Okajima, T. Matsuno

ENVIRONMENTAL RESEARCH LETTERS　10　(9)　095005　2015/09

DOI： 10.1088/1748-9326/10/9/095005 　

ISSN： 1748-9326
Three-dimensional structures of tropical nonmigrating tides in a high-vertical-resolution general circulation model Peer-reviewed

Takatoshi Sakazaki, Kaoru Sato, Yoshio Kawatani, Shingo Watanabe

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　120　(5)　1759-1775　2015/03

DOI： 10.1002/2014JD022464 　

ISSN： 2169-897X

eISSN： 2169-8996
Three-dimensional structures of tropical nonmigrating tides in a high-vertical-resolution general circulation model Peer-reviewed

Takatoshi Sakazaki, Kaoru Sato, Yoshio Kawatani, Shingo Watanabe

Journal of Geophysical Research　120　(5)　1759-1775　2015
Publisher: Wiley-Blackwell
DOI： 10.1002/2014JD022464 　

ISSN： 2156-2202 0148-0227
Vertical resolution dependence of gravity wave momentum flux simulated by an atmospheric general circulation model Peer-reviewed

S. Watanabe, K. Sato, Y. Kawatani, M. Takahashi

GEOSCIENTIFIC MODEL DEVELOPMENT　8　(6)　1637-1644　2015

DOI： 10.5194/gmd-8-1637-2015 　

ISSN： 1991-959X

eISSN： 1991-9603
Effect of snow-albedo feedback on future strong warming in boreal forest region of northern Eurasia in MIROC-ESM Peer-reviewed

Abe, Manabu, Takata, Kumiko, Kawamiya, Michio an, Watanabe, Shingo

2015
Dynamics and Variability of the Stratosphere‐Troposphere System (DynVar) Application for CMIP6-Endorsed MIPs Peer-reviewed

Gerber, Edwin, Manzini, Elisa, Butler, Amy, Calvo, Natalia, Charlton-Perez, Andrew, Giorgetta, Marco, Scaife, Adam, Shaw, Tiffany an, Watanabe, Shingo

Application for CMIP6-Endorsed MIPs　2015
The Geoengineering Model Intercomparison Project Phase 6 (GeoMIP6): simulation design and preliminary results Peer-reviewed

B. Kravitz, A. Robock, S. Tilmes, O. Boucher, J. M. English, P. J. Irvine, A. Jones, M. G. Lawrence, M. MacCracken, H. Muri, J. C. Moore, U. Niemeier, S. J. Phipps, J. Sillmann, T. Storelvmo, H. Wang, S. Watanabe

Geoscientific Model Development　8　(10)　3379-3392　2015

DOI： 10.5194/gmd-8-3379-2015 　

ISSN： 1991-959X

eISSN： 1991-9603
Modeling in Earth system science up to and beyond IPCC AR5 Peer-reviewed

Tomohiro Hajima, Michio Kawamiya, Michio Watanabe, Etsushi Kato, Kaoru Tachiiri, Masahiro Sugiyama, Shingo Watanabe, Hideki Okajima, Akinori Ito

Progress in Earth and Planetary Science　1　(1)　1　2014/12/01
Publisher: Springer Berlin Heidelberg
DOI： 10.1186/s40645-014-0029-y 　

ISSN： 2197-4284

eISSN： 2197-4284
Solar radiation management impacts on agriculture in China: A case study in the Geoengineering Model Intercomparison Project (GeoMIP) Peer-reviewed

Lili Xia, Alan Robock, Jason Cole, Charles L. Curry, Duoying Ji, Andy Jones, Ben Kravitz, John C. Moore, Helene Muri, Ulrike Niemeier, Balwinder Singh, Simone Tilmes, Shingo Watanabe, Jin-Ho Yoon

Journal of Geophysical Research　119　(14)　8695-8711　2014/07/27
Publisher: Wiley-Blackwell
DOI： 10.1002/2013JD020630 　

ISSN： 2156-2202 0148-0227
Key factors governing uncertainty in the response to sunshade geoengineering from a comparison of the GeoMIP ensemble and a perturbed parameter ensemble Peer-reviewed

Peter J. Irvine, Olivier Boucher, Ben Kravitz, Kari Alterskjær, Jason N. S. Cole, Duoying Ji, Andy Jones, Daniel J. Lunt, John C. Moore, Helene Muri, Ulrike Niemeier, Alan Robock, Balwinder Singh, Simone Tilmes, Shingo Watanabe, Shuting Yang, Jin-Ho Yoon

Journal of Geophysical Research　119　(13)　7946-7962　2014/07/16
Publisher: Wiley-Blackwell
DOI： 10.1002/2013JD020716 　

ISSN： 2156-2202 0148-0227
Northern winter climate change: Assessment of uncertainty in CMIP5 projections related to stratosphere-troposphere coupling Peer-reviewed

E. Manzini, A. Yu. Karpechko, J. Anstey, M. P. Baldwin, R. X. Black, C. Cagnazzo, N. Calvo, A. Charlton-Perez, B. Christiansen, Paolo Davini, E. Gerber, M. Giorgetta, L. Gray, S. C. Hardiman, Y. Y. Lee, D. R. Marsh, B. A. McDaniel, A. Purich, A. A. Scaife, D. Shindell, S. W. Son, S. Watanabe, G. Zappa

Journal of Geophysical Research　119　(13)　7979-7998　2014/07/16
Publisher: Wiley-Blackwell
DOI： 10.1002/2013JD021403 　

ISSN： 2156-2202 0148-0227
Solar radiation management impacts on agriculture in China: A case study in the Geoengineering Model Intercomparison Project (GeoMIP) Peer-reviewed

Lili Xia, Alan Robock, Jason Cole, Charles L. Curry, Duoying Ji, Andy Jones, Ben Kravitz, John C. Moore, Helene Muri, Ulrike Niemeier, Balwinder Singh, Simone Tilmes, Shingo Watanabe, Jin-Ho Yoon

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(14)　8695-8711　2014/07

DOI： 10.1002/2013JD020630 　

ISSN： 2169-897X

eISSN： 2169-8996
Northern winter climate change: Assessment of uncertainty in CMIP5 projections related to stratosphere-troposphere coupling Peer-reviewed

E. Manzini, A. Yu. Karpechko, J. Anstey, M. P. Baldwin, R. X. Black, C. Cagnazzo, N. Calvo, A. Charlton-Perez, B. Christiansen, Paolo Davini, E. Gerber, M. Giorgetta, L. Gray, S. C. Hardiman, Y-Y Lee, D. R. Marsh, B. A. McDaniel, A. Purich, A. A. Scaife, D. Shindell, S-W Son, S. Watanabe, G. Zappa

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(13)　7979-7998　2014/07

DOI： 10.1002/2013JD021403 　

ISSN： 2169-897X

eISSN： 2169-8996
Key factors governing uncertainty in the response to sunshade geoengineering from a comparison of the GeoMIP ensemble and a perturbed parameter ensemble Peer-reviewed

Peter J. Irvine, Olivier Boucher, Ben Kravitz, Kari Alterskjaer, Jason N. S. Cole, Duoying Ji, Andy Jones, Daniel J. Lunt, John C. Moore, Helene Muri, Ulrike Niemeier, Alan Robock, Balwinder Singh, Simone Tilmes, Shingo Watanabe, Shuting Yang, Jin-Ho Yoon

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(13)　7946-7962　2014/07

DOI： 10.1002/2013JD020716 　

ISSN： 2169-897X

eISSN： 2169-8996
A multi-model assessment of regional climate disparities caused by solar geoengineering Peer-reviewed

Ben Kravitz, Douglas G. MacMartin, Alan Robock, Philip J. Rasch, Katharine L. Ricke, Jason N. S. Cole, Charles L. Curry, Peter J. Irvine, Duoying Ji, David W. Keith, Jon Egill Kristjansson, John C. Moore, Helene Muri, Balwinder Singh, Simone Tilmes, Shingo Watanabe, Shuting Yang, Jin-Ho Yoon

ENVIRONMENTAL RESEARCH LETTERS　9　(7)　074013　2014/07

DOI： 10.1088/1748-9326/9/7/074013 　

ISSN： 1748-9326
Solar radiation management impacts on agriculture in China: A case study in the Geoengineering Model Intercomparison Project (GeoMIP) Peer-reviewed

Lili Xia, Alan Robock, Jason Cole, Charles L. Curry, Duoying Ji, Andy Jones, Ben Kravitz, John C. Moore, Helene Muri, Ulrike Niemeier, Balwinder Singh, Simone Tilmes, Shingo Watanabe, Jin-Ho Yoon

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(14)　8695-8711　2014/07

DOI： 10.1002/2013JD020630 　

ISSN： 2169-897X

eISSN： 2169-8996
Forcings and feedbacks in the geomip ensemble for a reduction in solar irradiance and increase in CO2 Peer-reviewed

Nicolas Huneeus, Olivier Boucher, Kari Alterskjær, Jason N. S. Cole, Charles L. Curry, Duoying Ji, Andy Jones, Ben Kravitz, Jón Egill Kristjánsson, John C. Moore, Helene Muri, Ulrike Niemeier, Phil Rasch, Alan Robock, Balwinder Singh, Hauke Schmidt, Michael Schulz, Simone Tilmes, Shingo Watanabe, Jin-Ho Yoon

Journal of Geophysical Research　119　(9)　5226-5239　2014/05/16
Publisher: Wiley-Blackwell
DOI： 10.1002/2013JD021110 　

ISSN： 2156-2202 0148-0227
Forcings and feedbacks in the GeoMIP ensemble for a reduction in solar irradiance and increase in CO2 Peer-reviewed

Nicolas Huneeus, Olivier Boucher, Kari Alterskjaer, Jason N. S. Cole, Charles L. Curry, Duoying Ji, Andy Jones, Ben Kravitz, Jon Egill Kristjansson, John C. Moore, Helene Muri, Ulrike Niemeier, Phil Rasch, Alan Robock, Balwinder Singh, Hauke Schmidt, Michael Schulz, Simone Tilmes, Shingo Watanabe, Jin-Ho Yoon

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(9)　5226-5239　2014/05

DOI： 10.1002/2013JD021110 　

ISSN： 2169-897X

eISSN： 2169-8996
Forcings and feedbacks in the GeoMIP ensemble for a reduction in solar irradiance and increase in CO2 Peer-reviewed

Nicolas Huneeus, Olivier Boucher, Kari Alterskjaer, Jason N. S. Cole, Charles L. Curry, Duoying Ji, Andy Jones, Ben Kravitz, Jon Egill Kristjansson, John C. Moore, Helene Muri, Ulrike Niemeier, Phil Rasch, Alan Robock, Balwinder Singh, Hauke Schmidt, Michael Schulz, Simone Tilmes, Shingo Watanabe, Jin-Ho Yoon

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(9)　5226-5239　2014/05

DOI： 10.1002/2013JD021110 　

ISSN： 2169-897X

eISSN： 2169-8996
Kelvin and rossby-gravity wave packets in the lower stratosphere of some high-top CMIP5 models Peer-reviewed

F. Lott, S. N. Denvilbutchart, C. Cagnazzo, M. A. Giorgetta, S. C. Hardiman, E. Manzini, T. Krismer, J. P. Duvel, P. Maury, J. F. Scinocca, S. Watanabe, S. Yukimoto

Journal of Geophysical Research　119　(5)　2156-2173　2014/03/16
Publisher: Wiley-Blackwell
DOI： 10.1002/2013JD020797 　

ISSN： 2156-2202 0148-0227
Stratospheric ozone response to sulfate geoengineering: Results from the geoengineering model intercomparison project (GeoMip) Peer-reviewed

Giovanni Pitari, Valentina Aquila, Ben Kravitz, Alan Robock, Shingo Watanabe, Irene Cionni, Nataliade Luca, Glaucodi Genova, Eva Mancini, Simone Tilmes

Journal of Geophysical Research　119　(5)　2629-2653　2014/03/16
Publisher: Wiley-Blackwell
DOI： 10.1002/2013JD020566 　

ISSN： 2156-2202 0148-0227
Stratospheric ozone response to sulfate geoengineering: Results from the Geoengineering Model Intercomparison Project (GeoMIP) Peer-reviewed

Giovanni Pitari, Valentina Aquila, Ben Kravitz, Alan Robock, Shingo Watanabe, Irene Cionni, Natalia De Luca, Glauco Di Genova, Eva Mancini, Simone Tilmes

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(5)　2629-2653　2014/03

DOI： 10.1002/2013JD020566 　

ISSN： 2169-897X

eISSN： 2169-8996
Kelvin and Rossby-gravity wave packets in the lower stratosphere of some high-top CMIP5 models Peer-reviewed

F. Lott, S. Denvil, N. Butchart, C. Cagnazzo, M. A. Giorgetta, S. C. Hardiman, E. Manzini, T. Krismer, J. -P. Duvel, P. Maury, J. F. Scinocca, S. Watanabe, S. Yukimoto

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(5)　2156-2173　2014/03

DOI： 10.1002/2013JD020797 　

ISSN： 2169-897X

eISSN： 2169-8996
Stratospheric ozone response to sulfate geoengineering: Results from the Geoengineering Model Intercomparison Project (GeoMIP) Peer-reviewed

Giovanni Pitari, Valentina Aquila, Ben Kravitz, Alan Robock, Shingo Watanabe, Irene Cionni, Natalia De Luca, Glauco Di Genova, Eva Mancini, Simone Tilmes

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(5)　2629-2653　2014/03

DOI： 10.1002/2013JD020566 　

ISSN： 2169-897X

eISSN： 2169-8996
Arctic cryosphere response in the geoengineering model intercomparison project G3 and G4 scenarios Peer-reviewed

Mira Berdahl, Alan Robock, Duoying Ji, John C. Moore, Andy Jones, Ben Kravitz, Shingo Watanabe

Journal of Geophysical Research　119　(3)　1308-1321　2014/02/16
Publisher: Wiley-Blackwell
DOI： 10.1002/2013JD020627 　

ISSN： 2156-2202 0148-0227
Arctic cryosphere response in the Geoengineering Model Intercomparison Project G3 and G4 scenarios Peer-reviewed

Mira Berdahl, Alan Robock, Duoying Ji, John C. Moore, Andy Jones, Ben Kravitz, Shingo Watanabe

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(3)　1308-1321　2014/02

DOI： 10.1002/2013JD020627 　

ISSN： 2169-897X

eISSN： 2169-8996
Arctic cryosphere response in the Geoengineering Model Intercomparison Project G3 and G4 scenarios Peer-reviewed

Mira Berdahl, Alan Robock, Duoying Ji, John C. Moore, Andy Jones, Ben Kravitz, Shingo Watanabe

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(3)　1308-1321　2014/02

DOI： 10.1002/2013JD020627 　

ISSN： 2169-897X

eISSN： 2169-8996
Arctic sea ice and atmospheric circulation under the geomip G1 scenario Peer-reviewed

John C. Moore, Annette Rinke, Xiaoyong Yu, Duoying Ji, Xuefeng Cui, Yan Li, Kari Alterskjær, Jón Egill Kristjánsson, Helene Muri, Olivier Boucher, Nicolas Huneeus, Ben Kravitz, Alan Robock, Ulrike Niemeier, Michael Schulz, Simone Tilmes, Shingo Watanabe, Shuting Yang

Journal of Geophysical Research　119　(2)　567-583　2014/01/27
Publisher: Wiley-Blackwell
DOI： 10.1002/2013JD021060 　

ISSN： 2156-2202 0148-0227
Arctic sea ice and atmospheric circulation under the GeoMIP G1 scenario Peer-reviewed

John C. Moore, Annette Rinke, Xiaoyong Yu, Duoying Ji, Xuefeng Cui, Yan Li, Kari Alterskjaer, Jon Egill Kristjansson, Helene Muri, Olivier Boucher, Nicolas Huneeus, Ben Kravitz, Alan Robock, Ulrike Niemeier, Michael Schulz, Simone Tilmes, Shingo Watanabe, Shuting Yang

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(2)　567-583　2014/01

DOI： 10.1002/2013JD021060 　

ISSN： 2169-897X

eISSN： 2169-8996
Arctic sea ice and atmospheric circulation under the GeoMIP G1 scenario Peer-reviewed

John C. Moore, Annette Rinke, Xiaoyong Yu, Duoying Ji, Xuefeng Cui, Yan Li, Kari Alterskjaer, Jon Egill Kristjansson, Helene Muri, Olivier Boucher, Nicolas Huneeus, Ben Kravitz, Alan Robock, Ulrike Niemeier, Michael Schulz, Simone Tilmes, Shingo Watanabe, Shuting Yang

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　119　(2)　567-583　2014/01

DOI： 10.1002/2013JD021060 　

ISSN： 2169-897X

eISSN： 2169-8996
An energetic perspective on hydrological cycle changes in the Geoengineering Model Intercomparison Project Peer-reviewed

Ben Kravitz, Philip J. Rasch, Piers M. Forster, Timothy Andrews, Jason N. S. Cole, Peter J. Irvine, Duoying Ji, Jõn Egill Kristjánsson, John C. Moore, Helene Muri, Ulrike Niemeier, Alan Robock, Balwinder Singh, Simone Tilmes, Shingo Watanabe, Jin-Ho Yoon

Journal of Geophysical Research Atmospheres　118　(23)　13087-13102　2013/12/16
Publisher: Blackwell Publishing Ltd
DOI： 10.1002/2013JD020502 　

ISSN： 2169-8996
An energetic perspective on hydrological cycle changes in the Geoengineering Model Intercomparison Project Peer-reviewed

Ben Kravitz, Philip J. Rasch, Piers M. Forster, Timothy Andrews, Jason N. S. Cole, Peter J. Irvine, Duoying Ji, Jon Egill Kristjansson, John C. Moore, Helene Muri, Ulrike Niemeier, Alan Robock, Balwinder Singh, Simone Tilmes, Shingo Watanabe, Jin-Ho Yoon

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　118　(23)　13087-13102　2013/12

DOI： 10.1002/2013JD020502 　

ISSN： 2169-897X

eISSN： 2169-8996
The hydrological impact of geoengineering in the Geoengineering Model Intercomparison Project (GeoMIP) Peer-reviewed

Simone Tilmes, John Fasullo, Jean-Francois Lamarque, Daniel R. Marsh, Michael Mills, Kari Alterskjær, Helene Muri, Jõn E. Kristjánsson, Olivier Boucher, Michael Schulz, Jason N. S. Cole, Charles L. Curry, Andy Jones, Jim Haywood, Peter J. Irvine, Duoying Ji, John C. Moore, Diana B. Karam, Ben Kravitz, Philip J. Rasch, Balwinder Singh, Jin-Ho Yoon, Ulrike Niemeier, Hauke Schmidt, Alan Robock, Shuting Yang, Shingo Watanabe

Journal of Geophysical Research Atmospheres　118　(19)　11036-11058　2013/10/16
Publisher: Blackwell Publishing Ltd
DOI： 10.1002/jgrd.50868 　

ISSN： 2169-8996
Sea spray geoengineering experiments in the geoengineering model intercomparison project (GeoMIP): Experimental design and preliminary results Peer-reviewed

Ben Kravitz, Piers M. Forster, Andy Jones, Alan Robock, Kari Alterskjær, Olivier Boucher, Annabel K. L. Jenkins, Hannele Korhonen, Jõn Egill Kristjánsson, Helene Muri, Ulrike Niemeier, Antti-Ilari Partanen, Philip J. Rasch, Hailong Wang, Shingo Watanabe

Journal of Geophysical Research Atmospheres　118　(19)　11175-11186　2013/10/16
Publisher: Blackwell Publishing Ltd
DOI： 10.1002/jgrd.50856 　

ISSN： 2169-8996
The hydrological impact of geoengineering in the Geoengineering Model Intercomparison Project (GeoMIP) Peer-reviewed

Simone Tilmes, John Fasullo, Jean-Francois Lamarque, Daniel R. Marsh, Michael Mills, Kari Alterskjaer, Helene Muri, Jon E. Kristjansson, Olivier Boucher, Michael Schulz, Jason N. S. Cole, Charles L. Curry, Andy Jones, Jim Haywood, Peter J. Irvine, Duoying Ji, John C. Moore, Diana B. Karam, Ben Kravitz, Philip J. Rasch, Balwinder Singh, Jin-Ho Yoon, Ulrike Niemeier, Hauke Schmidt, Alan Robock, Shuting Yang, Shingo Watanabe

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　118　(19)　11036-11058　2013/10

DOI： 10.1002/jgrd.50868 　

ISSN： 2169-897X

eISSN： 2169-8996
Sea spray geoengineering experiments in the geoengineering model intercomparison project (GeoMIP): Experimental design and preliminary results Peer-reviewed

Ben Kravitz, Piers M. Forster, Andy Jones, Alan Robock, Kari Alterskjaer, Olivier Boucher, Annabel K. L. Jenkins, Hannele Korhonen, Jon Egill Kristjansson, Helene Muri, Ulrike Niemeier, Antti-Ilari Partanen, Philip J. Rasch, Hailong Wang, Shingo Watanabe

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　118　(19)　11175-11186　2013/10

DOI： 10.1002/jgrd.50856 　

ISSN： 2169-897X

eISSN： 2169-8996
The impact of abrupt suspension of solar radiation management (termination effect) in experiment G2 of the Geoengineering Model Intercomparison Project (GeoMIP) Peer-reviewed

Andy Jones, Jim M. Haywood, Kari Alterskjær, Olivier Boucher, Jason N. S. Cole, Charles L. Curry, Peter J. Irvine, Duoying Ji, Ben Kravitz, Jón Egill Kristjánsson, John C. Moore, Ulrike Niemeier, Alan Robock, Hauke Schmidt, Balwinder Singh, Simone Tilmes, Shingo Watanabe, Jin-Ho Yoon

Journal of Geophysical Research Atmospheres　118　(17)　9743-9752　2013/09/16

DOI： 10.1002/jgrd.50762 　

ISSN： 2169-8996
Climate model response from the Geoengineering Model Intercomparison Project (GeoMIP) Peer-reviewed

Ben Kravitz, Ken Caldeira, Olivier Boucher, Alan Robock, Philip J. Rasch, Kari Alterskjær, Diana Bou Karam, Jason N. S. Cole, Charles L. Curry, James M. Haywood, Peter J. Irvine, Duoying Ji, Andy Jones, Jõn Egill Kristjánsson, Daniel J. Lunt, John C. Moore, Ulrike Niemeier, Hauke Schmidt, Michael Schulz, Balwinder Singh, Simone Tilmes, Shingo Watanabe, Shuting Yang, Jin-Ho Yoon

Journal of Geophysical Research Atmospheres　118　(15)　8320-8332　2013/08/16
Publisher: Blackwell Publishing Ltd
DOI： 10.1002/jgrd.50646 　

ISSN： 2169-8996
Climate model response from the Geoengineering Model Intercomparison Project (GeoMIP) Peer-reviewed

Ben Kravitz, Ken Caldeira, Olivier Boucher, Alan Robock, Philip J. Rasch, Kari Alterskjaer, Diana Bou Karam, Jason N. S. Cole, Charles L. Curry, James M. Haywood, Peter J. Irvine, Duoying Ji, Andy Jones, Jon Egill Kristjansson, Daniel J. Lunt, John C. Moore, Ulrike Niemeier, Hauke Schmidt, Michael Schulz, Balwinder Singh, Simone Tilmes, Shingo Watanabe, Shuting Yang, Jin-Ho Yoon

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　118　(15)　8320-8332　2013/08

DOI： 10.1002/jgrd.50646 　

ISSN： 2169-897X
Long-term ozone changes and associated climate impacts in CMIP5 simulations Peer-reviewed

V. Eyring, J. M. Arblaster, I. Cionni, J. Sedlacek, J. Perliwitz, P. J. Young, S. Bekki, D. Bergmann, P. Cameron-Smith, W. J. Collins, G. Faluvegi, K. D. Gottschaldt, L. W. Horowitz, D. E. Kinnison, J. F. Lamarque, D. R. Marsh, D. Saint-Martin, D. T. Shindell, K. Sudo, S. Szopa, S. Watanabe

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　118　(10)　5029-5060　2013/05

DOI： 10.1002/jgrd.50316 　

ISSN： 2169-897X

eISSN： 2169-8996
On the lack of stratospheric dynamical variability in low-top versions of the CMIP5 models Peer-reviewed

Andrew J. Charlton-Perez, Mark P. Baldwin, Thomas Birner, Robert X. Black, Amy H. Butler, Natalia Calvo, Nicholas A. Davis, Edwin P. Gerber, Nathan Gillett, Steven Hardiman, Junsu Kim, Kirstin Krüger, Yun-Young Lee, Elisa Manzini, Brent A. McDaniel, Lorenzo Polvani, Thomas Reichler, Tiffany A. Shaw, Michael Sigmond, Seok-Woo Son, Matthew Toohey, Laura Wilcox, Shigeo Yoden, Bo Christiansen, François Lott, Drew Shindell, Seiji Yukimoto, Shingo Watanabe

Journal of Geophysical Research Atmospheres　118　(6)　2494-2505　2013/03/27
Publisher: Blackwell Publishing Ltd
DOI： 10.1002/jgrd.50125 　

ISSN： 2169-8996
On the lack of stratospheric dynamical variability in low-top versions of the CMIP5 models Peer-reviewed

Andrew J. Charlton-Perez, Mark P. Baldwin, Thomas Birner, Robert X. Black, Amy H. Butler, Natalia Calvo, Nicholas A. Davis, Edwin P. Gerber, Nathan Gillett, Steven Hardiman, Junsu Kim, Kirstin Krueger, Yun-Young Lee, Elisa Manzini, Brent A. McDaniel, Lorenzo Polvani, Thomas Reichler, Tiffany A. Shaw, Michael Sigmond, Seok-Woo Son, Matthew Toohey, Laura Wilcox, Shigeo Yoden, Bo Christiansen, Franois Lott, Drew Shindell, Seiji Yukimoto, Shingo Watanabe

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　118　(6)　2494-2505　2013/03

DOI： 10.1002/jgrd.50125 　

ISSN： 2169-897X

eISSN： 2169-8996
The variation of the Arctic cryosphere in the Last Millennium simulation using MIROC and MIROC-ESM

Sueyoshi Tetsuo, Ohgaito Rumi, Yoshimori Masakazu, Hajima Tomohiro, Saito Fuyuki, Abe Manabu, Okajima Hideki, Oishi Ryouta, Watanabe Shingo, Abe Ayako, Kawamiya Michio

Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research　2013　233　2013
Publisher: The Japanese Society of Snow and Ice / Japan Society for Snow Engineering
DOI： 10.14851/jcsir.2013.0_233 　

ISSN： 1883-0870

eISSN： 1883-0889
Set-up of the PMIP3 paleoclimate experiments conducted using an Earth system model, MIROC-ESM Peer-reviewed

T. Sueyoshi, R. Ohgaito, A. Yamamoto, M. O. Chikamoto, T. Hajima, H. Okajima, M. Yoshimori, M. Abe, R. O'ishi, F. Saito, S. Watanabe, M. Kawamiya, A. Abe-Ouchi

GEOSCIENTIFIC MODEL DEVELOPMENT　6　(3)　819-836　2013

DOI： 10.5194/gmd-6-819-2013 　

ISSN： 1991-959X
Can an Earth System Model simulate better climate change at mid-Holocene than an AOGCM? A comparison study of MIROC-ESM and MIROC3 Peer-reviewed

Ohgaito, R., Sueyoshi, T., Abe-Ouchi, A., Hajima, T., Watanabe, S., Kim, H. -J., Yamamoto, A., Kawamiya, M.

Climate of the Past　9　(4)　1519-1542　2013

DOI： 10.5194/cp-9-1519-2013 　
Growth of planetary waves and the formation of an elevated stratopause after a major stratospheric sudden warming in a T213L256 GCM Peer-reviewed

Yoshihiro Tomikawa, Kaoru Sato, Shingo Watanabe, Yoshio Kawatani, Kazuyuki Miyazaki, Masaaki Takahashi

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　117　2012/08

DOI： 10.1029/2011JD017243 　

ISSN： 2169-897X
Climate Change, Allowable Emission, and Earth System Response to Representative Concentration Pathway Scenarios Peer-reviewed

Tomohiro Hajima, Takeshi Ise, Kaoru Tachiiri, Etsushi Kato, Shingo Watanabe, Michio Kawamiya

JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN　90　(3)　417-433　2012/06

DOI： 10.2151/jmsj.2012-305 　

ISSN： 0026-1165

eISSN： 2186-9057
ASSESSING AND UNDERSTANDING THE IMPACT OF STRATOSPHERIC DYNAMICS AND VARIABILITY ON THE EARTH SYSTEM Peer-reviewed

Edwin P. Gerber, Amy Butler, Natalia Calvo, Andrew Charlton-Perez, Marco Giorgetta, Elisa Manzini, Judith Perlwitz, Lorenzo M. Polvani, Fabrizio Sassi, Adam A. Scaife, Tiffany A. Shaw, Seok-Woo Son, Shingo Watanabe

BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY　93　(6)　845-859　2012/06

DOI： 10.1175/BAMS-D-11-00145.1 　

ISSN： 0003-0007

eISSN： 1520-0477
Gravity Wave Characteristics in the Southern Hemisphere Revealed by a High-Resolution Middle-Atmosphere General Circulation Model Peer-reviewed

Kaoru Sato, Satoshi Tateno, Shingo Watanabe, Yoshio Kawatani

JOURNAL OF THE ATMOSPHERIC SCIENCES　69　(4)　1378-1396　2012/04

DOI： 10.1175/JAS-D-11-0101.1 　

ISSN： 0022-4928

eISSN： 1520-0469
Sensitivity of the QBO to Mean Tropical Upwelling under a Changing Climate Simulated with an Earth System Model Peer-reviewed

Shingo Watanabe, Yoshio Kawatani

JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN　90A　351-360　2012/02

DOI： 10.2151/jmsj.2012-A20 　

ISSN： 0026-1165

eISSN： 2186-9057
Future Increase in the All-sky UV-B Radiation over Asia Projected by an Earth System Model Peer-reviewed

Shingo Watanabe, Tokuta Yokohata

JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN　90A　295-305　2012/02

DOI： 10.2151/jmsj.2012-A15 　

ISSN： 0026-1165

eISSN： 2186-9057
The variation of the cryosphere in the Last Millennium simulation using integrated Earth System Model

Sueyoshi Tetsuo, Ohgaito Rumi, Hajima Tomohiro, Yoshimori Masakazu, Saito Fuyuki, Watanabe Shingo, Kawamiya Michio, Abe-Ouchi Ayako

Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research　2012　223-223　2012
Publisher: The Japanese Society of Snow and Ice / Japan Society for Snow Engineering
DOI： 10.14851/jcsir.2012.0_223 　
Growth of planetary waves and the formation of an elevated stratopause after a major stratospheric sudden warming in a T213L256 GCM Peer-reviewed

Yoshihiro Tomikawa, Kaoru Sato, Shingo Watanabe, Yoshio Kawatani, Kazuyuki Miyazaki, Masaaki Takahashi

Journal of Geophysical Research Atmospheres　117　(16)　2012
Publisher: Blackwell Publishing Ltd
DOI： 10.1029/2011JD017243 　

ISSN： 0148-0227
Impact of rapid sea-ice reduction in the Arctic Ocean on the rate of ocean acidification Peer-reviewed

A. Yamamoto, M. Kawamiya, A. Ishida, Y. Yamanaka, S. Watanabe

BIOGEOSCIENCES　9　(6)　2365-2375　2012

DOI： 10.5194/bg-9-2365-2012 　

ISSN： 1726-4170

eISSN： 1726-4189
Climate and African precipitation changes in the mid-Holocene simulated using an Earth System Model MIROC-ESM Peer-reviewed

Shingo Watanabe

Climate of the Past Discussions　8　2012

DOI： 10.5194/CPD-8-3277-2012 　
Anthropogenic changes in the surface all-sky UV-B radiation through 1850-2005 simulated by an Earth system model Peer-reviewed

S. Watanabe, T. Takemura, K. Sudo, T. Yokohata, H. Kawase

ATMOSPHERIC CHEMISTRY AND PHYSICS　12　(11)　5249-5257　2012

DOI： 10.5194/acp-12-5249-2012 　

ISSN： 1680-7316
Future projections of surface UV-B in a changing climate Peer-reviewed

S. Watanabe, K. Sudo, T. Nagashima, T. Takemura, H. Kawase, T. Nozawa

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　116　(D16118)　2011/08

DOI： 10.1029/2011JD015749 　

ISSN： 2169-897X

eISSN： 2169-8996
The Quasi-Biennial Oscillation in a Double CO2 Climate Peer-reviewed

Yoshio Kawatani, Kevin Hamilton, Shingo Watanabe

JOURNAL OF THE ATMOSPHERIC SCIENCES　68　(2)　265-283　2011/02

DOI： 10.1175/2010JAS3623.1 　

ISSN： 0022-4928
Future Projections of Surface UV-B in a Changing Climate Peer-reviewed

Watanabe, S, K. Sudo, T. Nagashima, T. Takemura, H. Kawase, T. Nozawa

Journal of Geophysical Research　116　(D16)　D16118　2011

DOI： 10.1029/2011JD015749 　

ISSN： 0148-0227
MIROC-ESM: model description and basic results of CMIP5-20c3m experiments Peer-reviewed

Watanabe S, Hajima T, Sudo K, Nagashima T, Takemura T, Okajima H, Nozawa T, Kawase H, Abe M, Yokohata T, Ise T, Sato H, Kato E, Takata K, Emori S, Kawamiya M

Geoscientific Model Development Discussion　4　1063-1128　2011
Last glacial Maximum (LGM) simulation using integrated Earth System Model (II) Peer-reviewed

Sueyoshi T, Hajima T, Chikamoto M, Ohgaito R, Saito F, Watanabe S, Kawamiya M, Abe-Ouchi A, Abe-Ouchi A

Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research　2011　243　2011

DOI： 10.14851/jcsir.2011.0.243.0 　
MIROC-ESM 2010: model description and basic results of CMIP5-20c3m experiments Peer-reviewed

S. Watanabe, T. Hajima, K. Sudo, T. Nagashima, T. Takemura, H. Okajima, T. Nozawa, H. Kawase, M. Abe, T. Yokohata, T. Ise, H. Sato, E. Kato, K. Takata, S. Emori, M. Kawamiya

GEOSCIENTIFIC MODEL DEVELOPMENT　4　(4)　845-872　2011

DOI： 10.5194/gmd-4-845-2011 　

ISSN： 1991-959X

eISSN： 1991-9603
Improved Climate Simulation by MIROC5. Mean States, Variability, and Climate Sensitivity Peer-reviewed

Masahiro Watanabe, Tatsuo Suzuki, Ryouta O'ishi, Yoshiki Komuro, Shingo Watanabe, Seita Emori, Toshihiko Takemura, Minoru Chikira, Tomoo Ogura, Miho Sekiguchi, Kumiko Takata, Dai Yamazaki, Tokuta Yokohata, Toru Nozawa, Hiroyasu Hasumi, Hiroaki Tatebe, Masahide Kimoto

JOURNAL OF CLIMATE　23　(23)　6312-6335　2010/12

DOI： 10.1175/2010JCLI3679.1 　

ISSN： 0894-8755

eISSN： 1520-0442
Recent developments in gravity-wave effects in climate models and the global distribution of gravity-wave momentum flux from observations and models Peer-reviewed

M. J. Alexander, M. Geller, C. McLandress, S. Polavarapu, P. Preusse, F. Sassi, K. Sato, S. Eckermann, M. Ern, A. Hertzog, Y. Kawatani, M. Pulido, T. A. Shaw, M. Sigmond, R. Vincent, S. Watanabe

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY　136　(650)　1103-1124　2010/07

DOI： 10.1002/qj.637 　

ISSN： 0035-9009

eISSN： 1477-870X
Transport and Mixing in the Extratropical Tropopause Region in a High-Vertical-Resolution GCM. Part II: Relative Importance of Large-Scale and Small-Scale Dynamics Peer-reviewed

Kazuyuki Miyazaki, Kaoru Sato, Shingo Watanabe, Yoshihiro Tomikawa, Yoshio Kawatani, Masaaki Takahashi

JOURNAL OF THE ATMOSPHERIC SCIENCES　67　(5)　1315-1336　2010/05

DOI： 10.1175/2009JAS3334.1 　

ISSN： 0022-4928

eISSN： 1520-0469
Transport and Mixing in the Extratropical Tropopause Region in a High-Vertical-Resolution GCM. Part I: Potential Vorticity and Heat Budget Analysis Peer-reviewed

Kazuyuki Miyazaki, Shingo Watanabe, Yoshio Kawatani, Yoshihiro Tomikawa, Masaaki Takahashi, Kaoru Sato

JOURNAL OF THE ATMOSPHERIC SCIENCES　67　(5)　1293-1314　2010/05

DOI： 10.1175/2009JAS3221.1 　

ISSN： 0022-4928
The Roles of Equatorial Trapped Waves and Internal Inertia-Gravity Waves in Driving the Quasi-Biennial Oscillation. Part II: Three-Dimensional Distribution of Wave Forcing Peer-reviewed

Yoshio Kawatani, Kaoru Sato, Timothy J. Dunkerton, Shingo Watanabe, Saburo Miyahara, Masaaki Takahashi

JOURNAL OF THE ATMOSPHERIC SCIENCES　67　(4)　981-997　2010/04

DOI： 10.1175/2009JAS3223.1 　

ISSN： 0022-4928
The Roles of Equatorial Trapped Waves and Internal Inertia-Gravity Waves in Driving the Quasi-Biennial Oscillation. Part I: Zonal Mean Wave Forcing Peer-reviewed

Yoshio Kawatani, Kaoru Sato, Timothy J. Dunkerton, Shingo Watanabe, Saburo Miyahara, Masaaki Takahashi

JOURNAL OF THE ATMOSPHERIC SCIENCES　67　(4)　963-980　2010/04

DOI： 10.1175/2009JAS3222.1 　

ISSN： 0022-4928

eISSN： 1520-0469
Last glacial Maximum (LGM) simulation using integrated Earth System Model Peer-reviewed

Sueyoshi T, Abe-Ouchi A, Watanabe S, Hajima T, Ohgaito R, Saito F, Kawamiya M

Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research　2010　99　2010

DOI： 10.14851/jcsir.2010.0.99.0 　
On the origins of mesospheric gravity waves Peer-reviewed

K. Sato, S. Watanabe, Y. Kawatani, Y. Tomikawa, K. Miyazaki, M. Takahashi

GEOPHYSICAL RESEARCH LETTERS　36　2009/10

DOI： 10.1029/2009GL039908 　

ISSN： 0094-8276

eISSN： 1944-8007
Simulation of the eastward 4-day wave in the Antarctic winter mesosphere using a gravity wave resolving general circulation model Peer-reviewed

Shingo Watanabe, Yoshihiro Tomikawa, Kaoru Sato, Yoshio Kawatani, Kazuyuki Miyazaki, Masaaki Takahashi

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　114　2009/08

DOI： 10.1029/2008JD011636 　

ISSN： 2169-897X

eISSN： 2169-8996
Quantification of the gravity wave forcing of the migrating diurnal tide in a gravity wave-resolving general circulation model Peer-reviewed

Shingo Watanabe, Saburo Miyahara

Journal of Geophysical Research Atmospheres　114　(7)　2009/04/16
Publisher: Blackwell Publishing Ltd
DOI： 10.1029/2008JD011218 　

ISSN： 0148-0227
Quantification of the gravity wave forcing of the migrating diurnal tide in a gravity wave-resolving general circulation model Peer-reviewed

Shingo Watanabe, Saburo Miyahara

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　114　2009/04

DOI： 10.1029/2008JD011218 　

ISSN： 2169-897X

eISSN： 2169-8996
Simulation of the eastward 4-day wave in the Antarctic winter mesosphere using a gravity wave resolving general circulation model Peer-reviewed

Shingo Watanabe, Yoshihiro Tomikawa, Kaoru Sato, Yoshio Kawatani, Kazuyuki Miyazaki, Masaaki Takahashi

Journal of Geophysical Research Atmospheres　114　(16)　2009
Publisher: Blackwell Publishing Ltd
DOI： 10.1029/2008JD011636 　

ISSN： 0148-0227
Wintertime temperature maximum at the subtropical stratopause in a T213L256 GCM Peer-reviewed

Y. Tomikawa, K. Sato, S. Watanabe, Y. Kawatani, K. Miyazaki, M. Takahashi

Journal of Geophysical Research Atmospheres　113　(17)　2008/09/16
Publisher: Blackwell Publishing Ltd
DOI： 10.1029/2008JD009786 　

ISSN： 0148-0227
Wintertime temperature maximum at the subtropical stratopause in a T213L256 GCM Peer-reviewed

Y. Tomikawa, K. Sato, S. Watanabe, Y. Kawatani, K. Miyazaki, M. Takahashi

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　113　(D17)　2008/09

DOI： 10.1029/2008JD009786 　

ISSN： 2169-897X
General aspects of a T213L256 middle atmosphere general circulation model Peer-reviewed

Shingo Watanabe, Yoshio Kawatani, Yoshihiro Tomikawa, Kazuyuki Miyazaki, Masaaki Takahashi, Kaoru Sato

Journal of Geophysical Research Atmospheres　113　(12)　2008/06/27
Publisher: Blackwell Publishing Ltd
DOI： 10.1029/2008JD010026 　

ISSN： 0148-0227
General aspects of a T213L256 middle atmosphere general circulation model Peer-reviewed

Shingo Watanabe, Yoshio Kawatani, Yoshihiro Tomikawa, Kazuyuki Miyazaki, Masaaki Takahashi, Kaoru Sato

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　113　(D12)　2008/06

DOI： 10.1029/2008JD010026 　

ISSN： 2169-897X

eISSN： 2169-8996
Development of an atmospheric general circulation model for integrated Earth system modeling on the Earth Simulator Peer-reviewed

Watanabe, Shingo, Miura, Hiroaki, Sekiguchi, Miho, Nagashima, Tatsuya, Sudo, Kengo, Emori, Seita, Kawamiya, Michio

J. Earth Simulator　9　27-35　2008
Constraints on a Non-orographic Gravity Wave Drag Parameterization Using a Gravity Wave Resolving General Circulation Model Peer-reviewed

Shingo Watanabe

SOLA　4　61-64　2008

DOI： 10.2151/sola.2008-016 　

ISSN： 1349-6476
A general circulation model study of the orographic gravity waves over Antarctica excited by katabatic winds Peer-reviewed

Shingo Watanabe, Kaoru Sato, Masaaki Takahashi

Journal of Geophysical Research Atmospheres　111　(18)　2006/09/27
Publisher: Blackwell Publishing Ltd
DOI： 10.1029/2005JD006851 　

ISSN： 0148-0227
A general circulation model study of the orographic gravity waves over Antarctica excited by katabatic winds Peer-reviewed

Shingo Watanabe, Kaoru Sato, Masaaki Takahashi

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　111　(D18)　2006/09

DOI： 10.1029/2005JD006851 　

ISSN： 2169-897X

eISSN： 2169-8996
A GCM study of orographic gravity waves over Antarctica excited by katabatic winds Peer-reviewed

Watanabe S, Sato K, Takahashi M

36th COSPAR Scientific Assembly　36　1709　2006
Kelvin waves and ozone Kelvin waves in the quasi-biennial oscillatio and semiannual oscillation: A simulation by a high-resolution chemistry-coupled general circulation model Peer-reviewed

Shingo Watanabe, Masaaki Takahashi

Journal of Geophysical Research D: Atmospheres　110　(18)　1-9　2005/09/27

DOI： 10.1029/2004JD005424 　

ISSN： 0148-0227
Kelvin waves and ozone Kelvin waves in the quasi-biennial oscillation and semiannual oscillation: A simulation by a high-resolution chemistry-coupled general circulation model Peer-reviewed

S Watanabe, M Takahashi

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES　110　(D18)　2005/09

DOI： 10.1029/2004JD005424 　

ISSN： 2169-897X

eISSN： 2169-8996
Impact of Global Warming on Gravity Wave Momentum Flux in the Lower Stratosphere Peer-reviewed

Shingo Watanabe, Tatsuya Nagashima, Seita Emori

SOLA　1　189-192　2005

DOI： 10.2151/sola.2005-049 　

ISSN： 1349-6476
Development of an integrated Earth system model on the Earth Simulator Peer-reviewed

Kawamiya Michio, Yoshikawa Chisato, Kato Tomomichi, Sato Hisashi, Sudo Kengo, Watanabe Shingo, Matsuno Taroh

J. Earth Simulator　4　18-30　2005
Interannual variations of the general circulation and polar stratospheric ozone losses in a general circulation model Peer-reviewed

S Watanabe, T Hirooka, S Miyahara

JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN　80　(4B)　877-895　2002/09

DOI： 10.2151/jmsj.80.877 　

ISSN： 0026-1165
Lagrangian transport experiments in the MLT region Peer-reviewed

S Watanabe, S Miyahara, Y Miyoshi

EARTH PLANETS AND SPACE　51　(7-8)　745-750　1999

DOI： 10.1186/BF03353233 　

ISSN： 1343-8832
INFLUENCES OF ARCTIC OZONE HOLE ON THE STRATOSPHERIC GENERAL CIRCULATION Peer-reviewed

HirooKa Toshihiko, Nishiyoshi Toshihiko, Watanabe Shingo, Miyahara Saburo

Polar meteorology and glaciology　13　1-10　1999
Publisher: National Institute of Polar Research
ISSN： 1344-3437

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Numerical experiments are performed for four years to estimate radiative and dynamical influences of the "Arctic ozone hole" on the stratospheric general circulation by using a general circulation model developed at Kyushu University. The model includes simplified ozone photochemistry interactively coupled with radiation and dynamics. The resultant temperature structure consists of cooling of about 6K in the polar lower stratosphere and warming of about 8K in the polar upper stratosphere, which intensifies the polar night jet by about 9ms^<-1>. The cooling is caused by reduction of downward motion as well as decrease of solar UV heating due to ozone depletion, while the warming is caused by dynamical heating due to enhancement of downward motion. The results imply that the feedback mechanism may strengthen the ozone hole itself.

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Misc. 56

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杉山昌広, 朝山慎一郎, 小杉隆信, 石井敦, 渡辺真吾

日本気象学会大会講演予稿集(CD-ROM)　(124)　2023
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日本地球惑星科学連合大会予稿集(Web)　2021　2021
成層圏対流圏過程とその気候における役割（SPARC）第6回総会報告 Peer-reviewed

佐藤薫, 塩谷雅人, 余田茂男, 堀之内武, 菅原敏, 藤原正智, 秋吉英治, 渡辺真吾, 冨川喜弘, 河谷芳雄, 小林ちあき, 田口正和, 江口菜穂, 宮崎和幸, 坂崎貴俊, 高麗正史, 木下武也

天気　67　(5)　285-293　2020/06
大規模アンサンブル気候データの効率的な解析に向けたコンテンツベース検索システム

中川友進, 川原慎太郎, 荒木文明, 松岡大祐, 石川洋一, 藤田実季子, 杉本志織, 岡田靖子, 川添祥, 渡辺真吾, 石井正好, 水田亮, 村田昭彦, 川瀬宏明

日本地球惑星科学連合大会予稿集(Web)　2019　2019
海洋・陸域の物質循環過程を高度化した地球システムモデル(MIROC‐ES2)の開発

羽島知洋, 渡辺路生, 野口真希, 山本彬友, 建部洋晶, 伊藤昭彦, 伊藤彰記, 阿部学, 山崎大, 渡辺真吾, 河宮未知生

日本海洋学会大会講演要旨集　2018　155　2018/09
氷河性ダストが氷期の気候に与える影響

大垣内るみ, 阿部彩子, 竹村俊彦, 伊藤彰記, 大石龍太, 渡辺真吾, 羽島知洋, 河宮未知生

日本気象学会大会講演予稿集　(114)　2018
SI-CAT気候実験データベースシステムの開発

中川友進, 川原慎太郎, 荒木文明, 松岡大祐, 石川洋一, 藤田実季子, 杉本志織, 岡田靖子, 川添祥, 渡辺真吾, 石井正好, 水田亮, 村田昭彦, 川瀬宏明

日本地球惑星科学連合大会予稿集(Web)　2018　2018
MIROC-ESMをもちいた最終氷期最大期のダスト分布再現による気候場への影響

大垣内るみ, 大垣内るみ, 阿部彩子, 阿部彩子, 大石龍太, 竹村俊彦, 渡辺真吾, 河宮未知生

日本気象学会大会講演予稿集　(112)　2017
成層圏SO₂注入による気候工学の強制とフィードバック:GeoMIP G4実験の解析

樫村博基, 関谷高志, 阿部学, 渡邉真吾

日本地球惑星科学連合大会予稿集(Web)　2016　ROMBUNNO.AAS11‐17 (WEB ONLY)　2016
B206 MIROC-ESMをもちいた最終氷期最大期のダスト分布再現性と高緯度における沈着量に影響を与える要因解析(気候システムIII,一般口頭発表)

大垣内るみ, 阿部彩子, 竹村俊彦, 渡辺真吾, 羽島知洋, 大石龍太, 河宮未知生

大会講演予講集　108　303-303　2015
Publisher: 日本気象学会
B165 中層大気版NICAMにおける基本場・大気重力波の解像度依存性(中層大気研究の最前線,専門分科会)

小玉知央, 渡辺真吾, 那須野智江, 佐藤正樹, 久保川陽呂鎮

大会講演予講集　107　158-158　2015
Publisher: 日本気象学会
B207 成層圏SO2注入による気候工学の影響 : GeoMIP-G4実験の解析(気候システムIII,一般口頭発表)

樫村博基, 阿部学, 渡辺真吾

大会講演予講集　108　304-304　2015
Publisher: 日本気象学会
P395 MIROC-ESMの将来予測実験におけるユーラシア北部の春季気温上昇と積雪変化の関係(ポスター・セッション)

阿部学, 高田久美子, 河宮未知生, 渡辺真吾

大会講演予講集　108　475-475　2015
Publisher: 日本気象学会
P116 MIROC-ESMをもちいた最終氷期最大期の気候再現性とダスト分布(ポスターセッション)

大垣内るみ, 阿部彩子, 竹村俊彦, 末吉哲雄, 渡辺真吾, 羽島知洋, 大石龍太, 岡島秀樹, 齋藤冬樹, 近本めぐみ, 河宮未知生

大会講演予講集　105　82-82　2014
Publisher: 日本気象学会
C210 高分解能GCMデータを用いた太陽非同期潮汐の解析(中層大気,口頭発表)

坂崎貴俊, 佐藤薫, 河合芳雄, 渡辺真吾

大会講演予講集　106　341-341　2014
Publisher: 日本気象学会
P178 MIROC-ESMによるエアロゾルの直接効果及び間接効果の見積もり : 熱帯域と中緯度域との違い(ポスター・セッション)

高橋洋, 渡辺真吾, 高田久美子

大会講演予講集　106　260-260　2014
Publisher: 日本気象学会
Development of a High-Resolution Climate Model for Model-Observation Integrating Studies from the Earth's Surface to the Lower Thermosphere

Annual report of the Earth Simulator Center　117-121　2013/04
Publisher: Earth Simulator Center, Japan Agency for Marine-Earth Science and Technology
ISSN： 1348-5822
大気海洋結合モデルMIROCおよび地球システム統合モデルMIROC-ESMを用いた過去1000年シミュレーションにおける北極域雪氷圏の変動

末吉哲雄, 大垣内るみ, 吉森正和, 羽島知洋, 齋藤冬樹, 阿部学, 阿部学, 岡島秀樹, 大石龍太, 大石龍太, 渡邉真吾, 河宮未知生, 阿部彩子, 阿部彩子

雪氷研究大会講演要旨集　2013　2013

ISSN： 1883-0870
D363 大気大循環モデルでシミュレートされる重力波運動量フラックスの鉛直解像度依存性(中層大気,口頭発表)

渡辺真吾, 佐藤薫, 河谷芳雄, 高橋正明

大会講演予講集　104　583-583　2013
Publisher: 日本気象学会
P166 全球非静力学大気モデルNICAMの中層大気への拡張(ポスター・セッション)

小玉知央, 那須野智江, 渡辺真吾, 久保川陽呂鎮, 佐藤正樹

大会講演予講集　104　250-250　2013
Publisher: 日本気象学会
P142 高分解能GCMデータにおけるnon-migrating tides(ポスター・セッション)

坂崎貴俊, 佐藤薫, 河谷芳雄, 渡辺真吾

大会講演予講集　104　226-226　2013
Publisher: 日本気象学会
B457 地球システムモデルの現況と将来展望(ポスト「京」に向けた気象・気候シミュレーションの展望,専門分科会)

渡辺真吾

大会講演予講集　103　419-419　2013
Publisher: 日本気象学会
223 MIROC一ESMをもちいた完新世中期のサハラ域の降水 : MIROC3と比較して(ポスター・セッション)

大垣内るみ, 末吉哲雄, 阿部彩子, 羽島知洋, 渡辺真吾, Kim Hyungjin, 山本彬友, 河宮未知生

大会講演予講集　103　238-238　2013
Publisher: 日本気象学会
C161 高解像度気候モデル中で発生した成層圏突然昇温の回復過程(中層大気研究の新展開,専門分科会)

冨川幸弘, 佐藤薫, 渡辺真吾, 河谷芳雄, 宮崎和幸, 高橋正明

大会講演予講集　101　91-91　2012
Publisher: 日本気象学会
D364 20世紀後半における北部太平洋域の寒冷化傾向に対する人為起源エアロゾルの影響(気候システムIII,口頭発表)

野沢徹, 小倉知夫, 阿部学, 竹村俊彦, 渡邉真吾, 河宮未知生, 時岡達志

大会講演予講集　102　468-468　2012
Publisher: 日本気象学会
A368 MIROC-ESMを用いた完新世中期シミュレーションにおけるアフリカモンスーン変動(気象システムIII,,一般口頭発表)

大垣内るみ, 末吉哲雄, 阿部彩子, 羽島知洋, 渡辺真吾, 山本彬友, 河宮未知生

大会講演予講集　100　111-111　2011/10/31
Publisher: 社団法人日本気象学会
D451 全球気候モデルMIROC5による現在気候の再現と将来予測(気候システムモデリング,AR5に向けた気候変化予測の現状,専門分科会)

横畠徳太, 渡部雅浩, 鈴木立郎, 大石龍太, 小室芳樹, 渡辺真吾, 江守正多, 竹村俊彦, 千喜良稔, 小倉知夫, 関口美保, 高田久美子, 山崎大, 野沢徹, 羽角博康, 建部洋晶, 塩竈秀夫, 木本昌秀

大会講演予講集　99　268-268　2011/04/30
Publisher: 社団法人日本気象学会
D204 成層圏循環の変動と大気の平均年代の関連について(大気力学,一般口頭発表)

渡辺真吾, 岡本功太, 佐藤薫

大会講演予講集　99　243-243　2011
Publisher: 日本気象学会
D459 地球システムモデルMIROC-ESM-CHEMによるアジア域の有害紫外線シミュレーション(地球システムモデリング,AR5に向けた気候変化予測の現状,専門分科会)

渡辺真吾, 須藤健悟, 永島達也, 竹村俊彦, 川瀬宏明, 野沢徹

大会講演予講集　99　276-276　2011
Publisher: 日本気象学会
D460 地球システム統合モデルMIROC-ESMにおけるRCPsシナリオ下での陸域炭素循環・土地利用変化の影響解析(地球システムモデリング,AR5に向けた気候変化予測の現状,専門分科会)

羽島知洋, 伊勢武史, 加藤悦史, 渡辺真吾, 河宮未知生

大会講演予講集　99　277-277　2011
Publisher: 日本気象学会
B106 GCMにおけるLAI予報の有無が北半球冬季気候場に与える影響(気候システムI,一般口頭発表)

渡辺真吾, 高田久美子

大会講演予講集　97　81-81　2010
Publisher: 日本気象学会
A370 地球温暖化時の赤道準2年振動(スペシャル・セッション「マルチ気候モデルデータ解析による地球温暖化現象の理解」,口頭発表)

河谷芳雄, Hamilton Kevin P, 渡辺真吾

大会講演予講集　98　111-111　2010
Publisher: 日本気象学会
A210 中高緯度対流圏界領域における高安定度・物質濃度勾配の形成機構(中層大気)

宮崎和幸, 渡辺真吾, 河谷芳雄, 冨川喜弘, 高橋正明, 佐藤薫

大会講演予講集　96　71-71　2009
Publisher: 日本気象学会
A456 高解像度気候モデルを用いた中層大気の大気重力波の研究(南極大型大気レーダーを軸とした極域大気研究の可能性,専門分科会)

舘野聡, 佐藤薫, 渡辺真吾, 河谷芳雄, 冨川喜弘, 宮崎和幸, 高橋正明

大会講演予講集　93　94-94　2008
Publisher: 日本気象学会
A466 T213L256大気大循環モデルを用いた冬季高緯度中間圏4日波の研究(南極大型大気レーダーを軸とした極域大気研究の可能性,専門分科会)

渡辺真吾, 冨川喜弘, 高橋正明, 河谷芳雄, 宮崎和幸, 佐藤薫

大会講演予講集　93　104-104　2008
Publisher: 日本気象学会
D163 南半球極域重力波の発生源の研究(中層大気)

舘野聡, 佐藤薫, 渡辺真吾, 河谷芳雄, 冨川喜弘, 宮崎和幸, 高橋正明

大会講演予講集　94　298-298　2008
Publisher: 日本気象学会
D161 高分解能大気大循環モデルを用いた中高緯度対流圏界領域の解析(中層大気)

宮崎和幸, 渡辺真吾, 河谷芳雄, 冨川喜弘, 高橋正明, 佐藤薫

大会講演予講集　94　296-296　2008
Publisher: 日本気象学会
D302 赤道成層圏QBOに於ける赤道波と内部重力波の役割Part I(中層大気)

河谷芳雄, 高橋正明, 渡辺真吾, 宮原三郎, 佐藤薫

大会講演予講集　92　320-320　2007
Publisher: 日本気象学会
D305 T213L256大気大循環モデルを用いた内部重力波と中層大気大循環の研究(中層大気)

渡辺真吾, 河谷芳雄, 冨川喜弘, 宮崎和幸, 高橋正明, 佐藤薫

大会講演予講集　92　323-323　2007
Publisher: 日本気象学会
D304 高解像度気候モデルを用いた冬半球亜熱帯成層圏界面に現れる気温極大の解析(中層大気)

冨川喜弘, 渡辺真吾, 河谷芳雄, 宮崎和幸, 高橋正明, 佐藤薫

大会講演予講集　92　322-322　2007
Publisher: 日本気象学会
B151 高解像度気候モデルによる中層大気研究の可能性(スペシャルセッション「高解像度気候モデルによる中層大気研究の可能性」)

佐藤薫, 高橋正明, 渡辺真吾, 冨川喜弘, 河谷芳雄

大会講演予講集　90　98-98　2006
Publisher: 日本気象学会
B164 高解像度気候モデルを用いた上部対流圏・下部成層圏での物質輸送過程の研究(スペシャルセッション「高解像度気候モデルによる中層大気研究の可能性」)

宮崎和幸, 渡辺真吾, 滝川雅之

大会講演予講集　90　111-111　2006
Publisher: 日本気象学会
B159 大気大循環モデルを用いた内部重力波の解析(スペシャルセッション「高解像度気候モデルによる中層大気研究の可能性」)

河谷芳雄, 高橋正明, 佐藤薫, 宮原三郎, 渡辺真吾

大会講演予講集　90　106-106　2006
Publisher: 日本気象学会
Report on SPARC 3rd General Assembly

YODEN Shigeo, EGUCHI Nawo, KAWATANI Yoshio, KUBO Hiroshi, NAGASHIMA Tatsuya, NISHIZAWA Seiya, NISHII Kazuaki, NIWANO Masanori, HIO Yasuko, MIYAZAKI Kazuyuki, WATANABE Shingo

天気　52　(4)　249-254　2005/04/30
Publisher: 日本気象学会
ISSN： 0546-0921
D307 高解像度AGCMを用いて重力波抵抗パラメタリゼーションを改良する試み(II)(大気力学I)

渡辺真吾, 永島達也

大会講演予講集　88　275-275　2005
Publisher: 日本気象学会
D105 南極のカタバ風が励起する大気内部重力波とその中層大気への影響(中層大気)

渡辺真吾, 佐藤薫, 高橋正明

大会講演予講集　87　215-215　2005
Publisher: 日本気象学会
D103 高解像度AGCMを用いて重力波抵抗パラメタリゼーションを最適化する試み(中層大気)

渡辺真吾, 永島達也

大会講演予講集　85　167-167　2004
Publisher: 日本気象学会
A353 大気大循環モデル中のオゾン場に見られる北半球夏季の波動成分について(衛星からの大気観測 : 日本の貢献と将来展望II)

河本望, 廣岡俊彦, 渡辺真吾

大会講演予講集　84　76-76　2003
Publisher: 日本気象学会
オゾンホールが大気大循環の経年変動に与える影響 : GCM実験による評価(III)

渡辺真吾, 廣岡俊彦, 宮原三郎

大会講演予講集　79　398-398　2001/05/08
4.オゾン全量長期変動傾向・オゾンと気候(国際オゾンシンポジウム-Sapporo 2000-報告)

渡辺真吾

天気　48　(8)　564-565　2001

ISSN： 0546-0921
1999年秋季極域・寒冷域研究連絡会の報告

小寺邦彦, 渡辺真吾, 廣岡俊彦, 宮原三郎, 立花義裕, 小倉知夫, 本井達夫

天気　47　(6)　469-474　2000/06/30
Publisher: 日本気象学会
ISSN： 0546-0921
オゾンホールが大気大循環の経年変動に与える影響 : GCM実験による評価

渡辺真吾, 廣岡俊彦, 宮原三郎

大会講演予講集　77　83-83　2000/05/24
Report of IUGG99 (1)

HIROTA Isamu, KIDA Hideji, NAGASHIMA Tatsuya, WATANABE Shingo, NAITO Yoko, TAKAGI Masahiro, IGA Shinichi, OGINO Shinya, UETAKE Teppei, NIWANO Masanori, HORINOUCHI Takeshi, MIYOSHI Yasunobu, KAWAMOTO Nozomi, SHIMIZU Atsushi, TAKIGAWA Masayuki, HIROOKA Toshihiko, YOSHIKI Motoyoshi, MIYAHARA Saburo, MORI Atsushi, NISHIMURA Kouichi, SUZUKI Shinichi, TAKAHASHI Masaaki

47　(1)　17-26　2000/01/31
Publisher: 日本気象学会
ISSN： 0546-0921
オゾンホールが中層大気大循環の経年変動に与える影響 : GCM実験による評価

渡辺真吾, 廣岡俊彦, 宮原三郎

大会講演予講集　76　259-259　1999/11/24
ラグランジュ平均子午面循環による夜間のO(^1S)分布の説明

渡辺真吾, 宮原三郎, 三好勉信

大会講演予講集　73　130-130　1998/05
上部中間圏・下部熱圏でのラグランジュ的物質輸送

渡辺真吾, 宮原三郎, 三好勉信

大会講演予講集　72　D211　1997/10

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Research Projects 16

A study of three-dimensional characteristics of middle atmosphere general circulation and wave hierarchical structure and its intra-seasonal to inter-annual variations

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: The University of Tokyo

2022/04/01 - 2027/03/31
エルニーニョ・南方振動気候モデル実験による重力波と赤道準2年振動の新知見

河谷芳雄, 藤原正智, 渡辺真吾

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(B)

2022/04/01 - 2026/03/31

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赤道準2年振動（QBO）気候モデル国際比較プロジェクト（QBOi）のco-leadsとして、国際共同研究を主導した。その中で現在進めているENSO－QBO実験を主責任者として取り纏め、3つの研究グループに分けて解析を続けて初期結果が出てきた。エルニーニョ実験とラニーニャ実験を比較すると、どの気候モデルもエルニーニョ実験の方がQBO周期が短く、観測と整合的である。しかし周期の変調にはモデル間で大きなばらつきがあり、その原因を運動量収支解析により調べている。典型的なQBO東西風サイクルが観測された1980年7月から1983年6月の36か月間を対象に、大気大循環モデルを全球再解析データを用いて初期値化したのち、月初から月末まで1か月間のTranspose-AMIP実験を毎月実施することにより、様々なQBO位相におけるQBO東西風の誤差成長の様子を調べた。使用した大気大循環モデルの弱点として、QBO東風シアー層の下降時の下降速度を過小評価する傾向が見られた。運動量収支の解析結果とともに、関連する国際会議で発表した。本年度は、4種の再解析データから計算した変形オイラー平均（TEM）方程式系の全項と残差項およびその全変数について、それらの気候値の比較・検証をおこなった論文を執筆し、Atmospheric Chemistry and Physics誌に投稿した。また、国際的な再解析データ比較検証活動S-RIP Phase 2の計画立案に関わりつつ、国際会議および国内学会にてこれに関連する招待講演をおこなった。また、基準高層観測網（GRUAN）の会議に出席し、ラジオゾンデ観測がQBOの状態監視の鍵であることについて議論した。
エルニーニョ・南方振動気候モデル実験による重力波と赤道準2年振動の新知見

河谷芳雄, 藤原正智, 渡辺真吾

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(B)

Institution: 国立研究開発法人海洋研究開発機構

2022/04/01 - 2026/03/31
New frontiers of decarbonization and climate change mitigation scenario after the Paris Agreement

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: The University of Tokyo

2021/04/01 - 2024/03/31
Clarification of dynamical coupling processes in the middle atmosphere and establishment of the accurate general circulation picture

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Kyushu University

2020/04/01 - 2024/03/31
The Quasi-biennial Oscillation and Gravity Wave Modulation by the El Nino Southern Oscillation

Kawatani Yoshio

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Japan Agency for Marine-Earth Science and Technology

2018/04/01 - 2022/03/31

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El Nino Southern Oscillation (ENSO)-equatorial biennial oscillation (QBO) experiments were conducted using a climate model in which gravity wave parameterization is not included, and various observational and reanalysis data were analyzed to investigate QBO modulation mechanism by ENSO. More gravity waves were excited during the El Nino period, which accelerate the downward speed of the lower stratospheric QBO. Although the equatorial upwelling that prevents the downward progataton of the QBO was larger during the El Nino than La Nina, effects of gravity wave was larger during El Nino, resulting in a shorter period. Models which include gravity wave parameterization did not show such QBO modulation due to unchanged gravity wave sources assumed in the parameterization.
Can we predict an unprecedented disruption of the equatorial stratospheric circulation in 2016?

Kawatani Yoshio

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Research (Exploratory)

Institution: Japan Agency for Marine-Earth Science and Technology

2017/06/30 - 2020/03/31

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The mechanism of the QBO disruption in 2016 was investigated by high-resolution atmospheric general circulation model with high vertical resolution. Extratropical Rossby waves propagating from mid-latitude stratosphere to low latitudes play crucial roles in forming the disruption. Ensemble experiments also implied the importance of El Nino and decreasing of sea ice on the disruption through making preferable condition for Rossby wave propagations. Tropical upwelling in the stratosphere is essential for upward propagation of QBO easterly in the middle stratosphere.
Formation mechanisms of general circulations and minor constituent changes in the mesosphere and the lower thermosphere

Hirooka Toshihiko

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Kyushu University

2016/04/01 - 2020/03/31

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Observational features of atmospheric fields up to the lower thermosphere during a vortex-split type major sudden stratospheric warming event in February 2018 were analyzed to show that the warming was relatively modest, although the upward propagation peak of planetary waves was comparable to that during a major warming event in January 2009. Furthermore, the representation of dynamical fields in the stratosphere and lower mesosphere was compared within six major global atmospheric reanalysis datasets and with recent satellite observations. It was found that the difference in the zonal wind field displayed a prominent equatorial maximum that increased with height, while that in the temperature field reached a minimum near the Equator and was largest in the polar regions.
全球でみられるテレコネクションとその役割および階層的大気モデル群による再現(GOTHAM)

渡辺真吾

Offer Organization: 科学技術振興機構

Category: 国際的な科学技術共同研究などの推進/戦略的国際科学技術協力推進事業/Belmont Forum

2016 - 2019

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本研究プログラムは、アジア・欧州のパートナーの協働のもとで、IPCCによって示された熱帯から高緯度に存在する脆弱な地域における、地域的かつ極端な気候イベントの過去〜現在のパターンおよびトレンドに関し、ロバスト・適切・かつ説明可能な知見を得ることを目的とする。地域気候変動に影響をおよぼす遠隔ドライバーあるいはテレコネクションと、それらによるインパクトの調査を行うことで、この目的を達成する。また、気候モデル、市民参加型(グリッド)コンピューティング、先端的な統計解析ツールを組み合わせることにより、季節〜10年規模の将来予測の改良に関するポテンシャルの調査も行う。現業気象・気候予測センターとの協力体制のもとに、地域レベルでの気象・気候サービスの改良に結びつき得る力学的要素に関する新知見を得る。そうした知見は直接的に気象・気候サービスの予測スキルの改良に貢献し得る。例えば、予測に使われるモデルが、脆弱な地域における地域的な気候変動に影響を与える重要なテレコネクションをまったくあるいは正しく表現できていない、といった情報は有益である。こうしたインパクトは、各々の研究グループやそれらを結んだネットワークを通じた定例会議や、より広範な科学ポリシープログラム(例えばWCRP)との連携を通じた成果として得られることなる。水文学や洪水予測といった影響評価研究のグループを含んだ本研究プログラムの成果を通じて、とくに社会インフラが脆弱な地域、例えばアジアモンスーン地域における、洪水リスクなどの事前評価といった恩恵がもたらされることが期待される。
Atmospheric composition data assimilation using multiple chemical transport models

MIYAZAKI Kazuyuki, WATANABE Shingo, KANAYA Yugo, SUDO Kengo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Japan Agency for Marine-Earth Science and Technology

2015/04/01 - 2018/03/31

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We conducted tropospheric chemistry reanalysis calculations by assimilating multiple data sets from multiple satellite sensors. The reanalysis calculations were conducted using three different global chemical transport model and an ensemble Kalman filter technique that simultaneously optimises the chemical concentrations of various species and emissions of several precursors. The optimisation of both the concentration and the emission fields is an efficient method to correct the entire tropospheric profile and its year-to-year variations, and to adjust various tracers chemically linked to the species assimilated. Using the multiple chemical transport models, we demonstrated the importance of forecast model performance on tropospheric chemistry data assimilation.
Mechanism of the Quasi-Biennial Oscillation modulation associated with climate change

KAWATANI Yoshio, WATANABE Shingo, SATO Kaoru

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Japan Agency for Marine-Earth Science and Technology

2014/04/01 - 2018/03/31

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The Quasi-biennial oscillation (QBO) and semi-annual oscillation (SAO) was successfully simulated by the climate model without non-stationary gravity wave parameterization. The mechanism of interannual variability of stratospheric water vapor was clarified by analyzing the climate model and satellite data. The experiments of the QBO modulation in a future climate were done following the international project, and modulations of the QBO were investigated. We participated in the stratosphere reanalyses intercomparison project (S-RIP). Several studies are published, such as representations of equatorial stratospheric zonal winds, comparison of mean meridional circulation and mixture processes, comparison of seasonal and interannual variations in dynamical fields etc.
A study on the three dimensional view of the atmospheric general circulation based on a new theory

Sato Kaoru

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: The University of Tokyo

2013/04/01 - 2018/03/31

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A theoretical study was conducted on approximated formulae of 3-D wave activity flux and Lagrangian mean flow. The formulation applicable to both non-stationary and stationary waves was successfully made. The theoretical formulae were used to clarify the influence of the 3-D mean flow on the tropospheric clouds associated with the stratospheric sudden warming and final warming. We showed the spectral characteristics of stratospheric and mesospheric gravity waves (GWs) by MST radar observations in the Antarctic and the modulation of GWs by ENSO and MJO using satellite observation data. The momentum budget was investigated using high resolution general circulation models, showing that the in-situ generation of GWs and Rossby waves (RWs) through momentum deposit by gravity waves originating from the troposphere is significant in the middle atmosphere. This means that close interaction between GWs, RWs and the mean flow is crucial for the 3D middle atmosphere circulation.
Possible connection between the mid-latitude SST frond and the middle atmosphere

Kawatani Yoshio, Nakamura Hisashi, Sato Kaoru, Watanabe Shingo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Japan Agency for Marine-Earth Science and Technology

2014/04/01 - 2017/03/31

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In order to investigate the possible connection between the sea surface temperature (SST) front and the middle atmospheric circulations, we have conducted the high-resolution climate model simulations with horizontal and vertical resolutions of 60km and 300m, respectively. No gravity wave parameterization is included in this model. Two experiments with boundary condition of realistic SST and smoothed SST without SST fronts are conducted. The interannual variations of the middle atmospheric circulations are large and thus statistically significant differences of the circulations between these two experiments are not found. The possible connection could not be found from 20-year integrations of this high-resolution climate model.
Dynamical processes in the mesosphere and the lower thermosphere during sudden stratospheric warmings

HIROOKA Toshihiko, MIYOSHI Yasunobu, KAWATANI Yoshio, IWAO Koki, WATANABE Shingo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Kyushu University

2012/04/01 - 2016/03/31

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In this study, in order to clarify the stratosphere-mesosphere-lower thermosphere dynamical coupling processes during sudden stratospheric warming (SSW) events, we make dynamical analyses of the general circulation up to the mesopause level on the basis of Aura Microwave Limb Sounder data. It is found that large-scale waves are strengthened in the mesosphere due to changing background wind structure prior to the SSW occurrence and the waves could significantly contribute to general circulation changes in the mesosphere as well as in the lower thermosphere. In addition, during SSW events, residual mean poleward flows are enhanced to lead to equatorial temperature perturbations consisting of a cooling in the stratosphere and a warming in the mesosphere. These temperature perturbations are found to modulate the equatorial semiannual oscillation with two separate out-of-phase maxima centered near the stratopause and the upper mesosphere through the thermal wind balance at the equator.
Simulation and climate variation of polar mesospheric clouds using a climate model

TAKAHASHI Masaaki, AKIYOSHI Hideharu, TAKIGAWA Masayuki, WATANABE Shingo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: The University of Tokyo

2012/04/01 - 2015/03/31

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The time variation of polar mesospheric cloud (noctilucent cloud) in the summer season is investigated using a climate model including the lower thermosphere. The variation of cloud occurring is controlled by 5-day oscillation, tides and eastward propagating gravity waves. The vertical extent of the cloud in the model is 10km scale that is not realistic. In order to have the realistic extent of cloud, a chemical climate model is developed for the occurrence of the cloud whose vertical extent is about 4km. The atmospheric response to 11-year solar cycle has been simulated. The response difference of temperature and water vapor between solar maximum and solar minimum is almost consistent to previous model results, however the response difference of cloud is small.
Direct and indirect effects of atmospheric gravity waves on the climate system

SATO Kaoru, AKIYOSHI Hideharu, WATANABE Shingo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: The University of Tokyo

2010/04/01 - 2013/03/31

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The effects of gravity waves (GW) in the earth climate are categorized into two: direct effects through their ability to deposit momentum to drive the general circulation, and indirect effects on the ozone chemistry through their temperature fluctuations to modulate polar stratospheric cloud amounts. Using data from a high-resolution general circulation model and a chemistry climate model, it was shown that GW forcing is distributed much wider than the source region by significant refraction and advection by the mean flow, that GW forcing is critical to the dissipation phase of the sudden stratospheric warming, and that the main forcing to drive the stratospheric circulation in the summer hemisphere is attributable to GW. By analyzing satellite data, GW indirect effect on the ozone chemistry is quantified. Moreover, we succeeded in formulation of a unified theory of the 3-d circulation driven by Rossby waves and GW that is inevitable for future studies using high-resolution data.

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