Details of the Researcher

PHOTO

Shohei Aoki
Section
Graduate School of Science
Job title
Associate Professor
Degree
Profile

東京大学ニュースサイトFOCUSの特集記事：”火星にあった「海」はなぜ消失した？”

令和３年度東京大学卓越研究員

主な参加プロジェクト 

  • 2024~: 欧州金星探査機Envision 分光装置VenSpec Suite Co-investigator
  • 2021~2022: 国際次期火星探査ミッションMars Ice Mapper mission Measurements-Definition-Team [link]
  • 2018~: JAXA MMX火星衛星探査計画 赤外分光計MIRS Co-investigator [link]
  • 2018~: JAXA MMX火星衛星探査計画 火星サブサイエンスチームメンバー
  • 2015~: 欧州火星探査機ExoMars Trace Gas Orbiter NOMAD分光計 Co-investigator [link]
  • 2010~: 欧州火星探査機Mars Express フーリエ分光計PFS Co-investigator
  • 2020:  IRTF望遠鏡 火星観測 Principle-investigator
  • 2019:  IRTF望遠鏡 金星観測 Principle-investigator
  • 2018:  ALMA望遠鏡 火星観測 Principle-investigator
  • 2016, 2017, 2018:  SOFIA望遠鏡 火星観測 Principle-investigator
  • 2012, 2014:  Subaru望遠鏡 火星観測 Principle-investigator
  • 2015~2018: EU Horizon2020プロジェクト“Understanding Planet Mars With Advanced Remote-sensing Datasets and Synergistic Studies (UPWARDS)” [link]
  • 2014~2016: EU FP7 プロジェクト“Collaborative Rover and Interactive Virtual Environments (CROSS-DRIVE)” [link]
  • 2012~2015: ESA プロジェクト“Synergetic SWIR and IR retrievals of near-surface concentrations of CH4 and CO for Eartha and Planetary atmospheres (SIROCCO)” [link]

Research History 9

  • 2025/11 - Present
    Tohoku University　Graduate School of Science Department of Geophysics

  • 2022/04 - Present
    東京大学　大学院新領域創成科学研究科複雑理工学専攻　講師

  • 2019/10 - Present
    Belgian Institute for Space Aeronomy (ベルギー王立宇宙科学研究所) Visiting researcher

  • 2021/04 - 2022/03
    国立研究開発法人宇宙航空研究開発機構 宇宙科学研究所 太陽系科学研究系 プロジェクト研究員

  • 2019/10 - 2021/03
    Université de Liège (リエージュ大学) FNRS F.R.S. (ベルギー国立科学研究基金) Postdoctoral Researcher

  • 2016/11 - 2019/10
    Belgian Institute for Space Aeronomy (ベルギー王立宇宙科学研究所)　Scientific collaborator under employment contract

  • 2014/11 - 2016/11
    Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica (イタリア宇宙科学研究所)　Research Assistant

  • 2014/04 - 2014/11
    Tohoku University

  • 2011/04 - 2014/03
    日本学術振興会 特別研究員 DC1 (東北大学)

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Education 3

  • 東北大学大学院　理学研究科　地球物理学専攻

    2011/04 - 2014/03

  • 東北大学大学院　理学研究科　地球物理学専攻

    2009/04 - 2011/03

  • 東北大学　理学部　宇宙地球物理学科

    2005/04 - 2009/03

Research Interests 9

  • 大気分光

  • リモートセンシング

  • 比較惑星

  • 地球型惑星

  • 金星

  • 火星

  • 惑星探査

  • 惑星大気

  • 惑星科学

Research Areas 1

  • Natural sciences / Space and planetary science /

Awards 7

  1. 文部科学大臣表彰（若手科学者賞）

    2024/04　探査機と望遠鏡の高波長分解能分光観測による火星大気研究

  2. NASA Agency Honor Group Award

    2024/03

  3. 大林奨励賞

    2022/11　地球電磁気・地球惑星圏学会

  4. 卓越研究員（公募型）

    2022/04　東京大学

  5. バロン・ニコレ賞2019

    2020/06　ベルギー王立科学アカデミー

  6. 博士研究教育院生

    2011/04　東北大学国際高等研究教育院

  7. 教育院修士研究教育院生

    2010/04　東北大学国際高等研究

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Papers 89

  1. Dust and Cloud Transport by Traveling Waves in the Martian Atmosphere Studied With Mars Climate Sounder Peer-reviewed

    Nozomi Kakinuma, Shohei Aoki, Takeshi Imamura, Katsuyuki Noguchi, Armin Kleinböhl

    Journal of Geophysical Research: Planets　131　(1)　2026/01/24

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2025je009387 　

    ISSN： 2169-9097

    eISSN： 2169-9100

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    Abstract Traveling waves in the Martian atmospheres play a crucial role in determining the weather and climate, particularly at mid‐to‐high latitudes. Previous observations have shown that these waves become prominent from early autumn to late winter in the northern hemisphere, influencing the dust cycle. However, their impact on the transport of dust and water ice clouds has not been studied quantitatively. Investigating the interaction between traveling waves and transport of such substances provides deeper insights into the climatology of Mars. In this study, we utilize data taken by the Mars Climate Sounder (MCS) onboard the Mars Reconnaissance Orbiter. Observations reveal eastward‐propagating waves during the northern autumn and winter, identified as Rossby waves. The results show that waves with a zonal wavenumber of 1 become prominent during this period and in this region. Moreover, there is a correlation among the periodic variations in temperature, dust, and water ice. The amplitudes of the temperature, dust, and water ice variations are roughly consistent with each other, suggesting that the variations are all driven by the meridional advection associated with the traveling waves. These findings suggest that traveling waves play a significant role in the transport of dust and water ice clouds on Mars.

  2. Following the HCl Cycle Over Three Martian Seasons in Mars Year 36 Peer-reviewed

    Sara Faggi, Shohei Aoki, Giuliano Liuzzi, Geronimo Villanueva, Hideo Sagawa, Michael J. Mumma, Ann Carine Vandaele, Frank Daerden, Sébastien Viscardy

    Journal of Geophysical Research: Planets　130　(11)　2025/11/14

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2025je009105 　

    ISSN： 2169-9097

    eISSN： 2169-9100

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    Abstract Hydrogen chloride (HCl) was recently discovered in the Mars atmosphere using the ESA's ExoMars Trace Gas Orbiter (TGO) onboard ESA's ExoMars mission. Its discovery is the first confirmation of an active presence of any chlorine‐bearing species in the modern Mars atmosphere. TGO permitted investigations of HCl altitude profiles with high precision and showed that water vapor and ice clouds play an important role in the production and temporary loss of HCl. TGO cannot always sample the Martian atmosphere near the surface, and when those measurements are possible, they are highly affected by the increase in dust opacity, nor can TGO observe at equatorial latitudes with high cadence, due to orbital constraints, so its measurements are not suitable to obtain instantaneous global coverage. In this work, we present a methodic investigation of the Martian atmosphere, in support of the ExoMars TGO mission, targeting HCl and water using iSHELL at NASA/InfraRed Telescope Facility. Our observations mapped the Martian atmosphere, exploring three seasons in Martian Year 36. We observed the beginning of an increase in the HCl abundances around L S  = 249°–301°, followed by a drop in the abundances around L S  = 319°. We confirmed a strong correlation between the spatial distribution of water vapor and HCl—both globally and locally—suggesting that water vapor plays an important role in the production of HCl, in agreement with previous studies. Our observations also suggest the presence of two competing processes involving the dust, one supporting HCl production and another one contributing to its destruction.

  3. A Statistical Study of Local Dust Storm Occurrences on Mars Using the 2.77 μm CO2 Band Observed by OMEGA/Mars Express Peer-reviewed

    Akira Kazama, Shohei Aoki, Yann Leseigneur, Mathieu Vincendon, Yasumasa Kasaba, Hiromu Nakagawa, Thomas Gautier, Aymeric Spiga, Tanguy Bertrand, Franck Montmessin, Kazunori Ogohara, Takeshi Imamura, Isao Murata, John Carter

    Journal of Geophysical Research: Planets, 130, e2025JE008987.　2025/09

  4. Sulfur Dioxide Distribution at the Venusian Cloud‐Top Retrieved From Akatsuki UV Images Peer-reviewed

    T. Iwanaka, T. Imamura, S. Aoki, E. Marcq, H. Sagawa, A. Stolzenbach, Y. J. Lee, A. Yamazaki

    Journal of Geophysical Research: Planets　130　(7)　2025/06/26

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2024je008775 　

    ISSN： 2169-9097

    eISSN： 2169-9100

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    Abstract and the unidentified UV absorber are major absorbers in the near‐ultraviolet region in the Venusian atmosphere and influence the climate system. We developed a method to retrieve and the imaginary part of the refractive index , a proxy for the unidentified absorber, from 15,002 pairs of 283 and images taken by the Ultraviolet imager (UVI) onboard Akatsuki. We obtained the distributions of and the unidentified absorber with high spatial resolution every 2 hours for about 6.5 years. We analyzed the local time and latitudinal distributions of and the unidentified absorber. The mixing ratio at the cloud top around altitude depends on latitude and local time, ranging from 80 to , within the range of previous observations. and the unidentified absorber are abundant at low latitudes and decrease toward mid‐latitudes, which is attributed to vertical transport by the Hadley circulation. The abundance is maximized around 14:30 at low latitudes; the distribution is explained by the vertical transport by the semi‐diurnal tide and consistent with the cloud‐top velocity distribution. The local time and latitude dependence of obtained is consistent with a three‐dimensional general circulation model involving photochemical reactions. We also derived the long‐term variations in and the unidentified absorber. increased from 2016 to 2019, showed no clear trend until early 2021, and decreased through 2022. No clear correlation was seen between the unidentified absorber and the mean super rotation speed, although it contributes to the solar heating rate.

  5. Global Mapping of HCl on Mars by IRTF/iSHELL

    S. Aoki, S. Faggi, G. L. Villanueva, G. Liuzzi, H. Sagawa, F. Daerden, S. Viscardy, S. Koyama, A. C. Vandaele

    The Planetary Science Journal　5　(158)　2024/07/16

    DOI： 10.3847/PSJ/ad58dc 　

  6. Synthesis of 13C-depleted organic matter from CO in a reducing early Martian atmosphere Peer-reviewed

    Yuichiro Ueno, Johan A. Schmidt, Matthew S. Johnson, Xiaofeng Zang, Alexis Gilbert, Hiroyuki Kurokawa, Tomohiro Usui, Shohei Aoki

    Nature Geoscience　2024/05/09

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41561-024-01443-z 　

    ISSN： 1752-0894

    eISSN： 1752-0908

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    Abstract Organic matter found in early Martian sediment may yield clues to the planet’s environmental conditions, prebiotic chemistry and habitability, but its origin remains unclear. Strong 13C depletion in sedimentary organic matter at Gale crater was recently detected by the Curiosity rover. Although this enigmatic depletion remains debated, if correct, a mechanism to cause such strong 13C depletion is required. Here we show from CO2 photolysis experiments and theoretical considerations that solar ultraviolet photolysis of CO2 in a reducing atmosphere can yield strongly 13C-depleted CO. We suggest that atmospheric synthesis of organic compounds from photolysis-produced CO is a plausible mechanism to explain the source of isotopically depleted organic matter in early Martian sediments. Furthermore, this mechanism could explain 13C enrichment of early Martian CO2 without requiring long-term carbon escape into space. A mass balance model calculation using our estimated isotopic fractionation factor indicates the conversion of approximately 20% of volcanic CO2 emissions on early Mars into organics via CO, consistent with the available data for carbon isotopes of carbonate. Although alternative pathways for organic compound production have been proposed, our findings suggest that considerable amounts of organic matter may have been synthesized from CO in a reducing early Martian atmosphere and deposited in sediments.

  7. CO2 in the atmosphere of Mars depleted in 13C Peer-reviewed

    Giuliano Liuzzi, Geronimo L. Villanueva, Shohei Aoki, Shane W. Stone, Sara Faggi, Loïc Trompet, Lori Neary, Frank Daerden, Sébastien Viscardy, Guido Masiello, Carmine Serio, Ian R. Thomas, Manish R. Patel, Giancarlo Bellucci, Jose-Juan Lopez-Moreno, Bojan Ristic, Ann Carine Vandaele

    Icarus　116121-116121　2024/05

    Publisher: Elsevier BV

    DOI： 10.1016/j.icarus.2024.116121 　

    ISSN： 0019-1035

  8. Constraining the global composition of D/H and 18O/16O in Martian water using SOFIA/EXES Peer-reviewed

    J Alday, S Aoki, C DeWitt, F Montmessin, J A Holmes, M R Patel, J P Mason, T Encrenaz, M J Richter, P G J Irwin, F Daerden, N Terada, H Nakagawa

    Monthly Notices of the Royal Astronomical Society　530　(3)　2919-2932　2024/04/22

    Publisher: Oxford University Press (OUP)

    DOI： 10.1093/mnras/stae1067 　

    ISSN： 0035-8711

    eISSN： 1365-2966

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    ABSTRACT Isotopic ratios in water vapour carry important information about the water reservoir on Mars. Localized variations in these ratios can inform us about the water cycle and surface–atmosphere exchanges. On the other hand, the global isotopic composition of the atmosphere carries the imprints of the long-term fractionation, providing crucial information about the early water reservoir and its evolution throughout history. Here, we report the analysis of measurements of the D/H and 18O/16O isotopic ratios in water vapour in different seasons (LS = 15○, 127○, 272○, and 305○) made with the Echelon-Cross-Echelle Spectrograph (EXES) aboard the Stratospheric Observatory for Infrared Astronomy (SOFIA). These measurements, free of telluric absorption, provide a unique tool for constraining the global isotopic composition of Martian water vapour. We find the maximum planetary D/H ratio in our observations during the northern summer (D/H = 5.2 ± 0.2 with respect to the Vienna Standard Mean Ocean Water, VSMOW) and to exhibit relatively small variations throughout the year (D/H = 5.0 ± 0.2 and 4.3 ± 0.4 VSMOW during the northern winter and spring, respectively), which are to first order consistent though noticeably larger than the expectations from condensation-induced fractionation. Our measurements reveal the annually averaged isotopic composition of water vapour to be consistent with D/H = 5.0 ± 0.2 and 18O/16O = 1.09 ± 0.08 VSMOW. In addition, based on a comparison between the SOFIA/EXES measurements and the predictions from a Global Climate Model, we estimate the D/H in the northern polar ice cap to be $\sim\!{5}~{ { \ \rm per\ cent } }$ larger than that in the atmospheric reservoir (D/Hice = 5.3 ± 0.3 VSMOW).

  9. Depletion of 13C in CO in the Atmosphere of Mars Suggested by ExoMars-TGO/NOMAD Observations Peer-reviewed

    S. Aoki, K. Shiobara, N. Yoshida, L. Trompet, T. Yoshida, N. Terada, H. Nakagawa, G. Liuzzi, A. C. Vandaele, I. R. Thomas, G. L. Villanueva, M. A. Lopez-Valverde, A. Brines, M. R. Patel, S. Faggi, F. Daerden, J. T. Erwin, B. Ristic, G. Bellucci, J. J. Lopez-Moreno, H. Kurokawa, Y. Ueno

    The Planetary Science Journal　4　(5)　97-97　2023/05/26

    Publisher: American Astronomical Society

    DOI： 10.3847/psj/acd32f 　

    eISSN： 2632-3338

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    Abstract The atmosphere of Mars is mainly composed by carbon dioxide (CO2). It has been predicted that photodissociation of CO2 depletes 13C in carbon monoxide (CO). We present the carbon 13C/12C isotopic ratio in CO at 30–50 km altitude from the analysis of the solar occultation measurements taken by the instrument Nadir and Occultation for Mars Discovery on board the ExoMars Trace Gas Orbiter (ExoMars-TGO). We retrieve 12C16O, 13C16O, and 12C18O volume mixing ratios from the spectra taken at 4112–4213 cm−1, where multiple CO isotope lines with similar intensities are available. The intensities of the 12C16O lines in this spectral range are particularly sensitive to temperature, thus we derive the atmospheric temperature by retrieving CO2 density with simultaneously measured spectra at 2966–2990 cm−1. The mean δ13C value obtained from the 13C16O/12C16O ratios is −263‰, and the standard deviation and standard error of the mean are 132‰ and 4‰, respectively. The relatively large standard deviation is due to the strong temperature dependences in the 12C16O lines. We also examine the 13C16O/12C18O ratio, whose lines are less sensitive to temperature. The mean δ value obtained with 12C18O instead of 12C16O is −82‰ with smaller standard deviation, 60‰. These results suggest that CO is depleted in 13C when compared to CO2 in the Martian atmosphere as measured by the Curiosity rover. This depletion of 13C in CO is consistent with the CO2 photolysis-induced fractionation, which might support a CO-based photochemical origin of organics in Martian sediments.

  10. Strong Depletion of 13C in CO Induced by Photolysis of CO2 in the Martian Atmosphere, Calculated by a Photochemical Model Peer-reviewed

    Tatsuya Yoshida, Shohei Aoki, Yuichiro Ueno, Naoki Terada, Yuki Nakamura, Kimie Shiobara, Nao Yoshida, Hiromu Nakagawa, Shotaro Sakai, Shungo Koyama

    The Planetary Science Journal　4　(3)　53-53　2023/03/01

    Publisher: American Astronomical Society

    DOI： 10.3847/psj/acc030 　

    eISSN： 2632-3338

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    Abstract The isotopic signature of atmospheric carbon offers a unique tracer for the history of the Martian atmosphere and the origin of organic matter on Mars. The photolysis of CO2 is known to induce strong isotopic fractionation of the carbon between CO2 and CO. However, its effects on the carbon isotopic compositions in the Martian atmosphere remain uncertain. Here, we develop a 1D photochemical model to consider the isotopic fractionation via photolysis of CO2, to estimate the vertical profiles of the carbon isotopic compositions of CO and CO2 in the Martian atmosphere. We find that CO is depleted in 13C compared with CO2 at each altitude, due to the fractionation via CO2 photolysis: the minimum value of the δ13C in CO is about −170‰ under the standard eddy diffusion setting. This result supports the hypothesis that fractionated atmospheric CO is responsible for the production of the 13C-depleted organic carbon in the Martian sediments detected by the Curiosity Rover, through the conversion of CO into organic materials and their deposition on the surface. The photolysis and transport-induced fractionation of CO that we report here leads to a ∼15% decrease in the amount of inferred atmospheric loss when combined with the present-day fractionation of the atmosphere and previous studies of carbon escape to space. The fractionated isotopic composition of CO in the Martian atmosphere may be observed by ExoMars Trace Gas Orbiter and ground-based telescopes, and the escaping ion species produced by the fractionated carbon-bearing species may be detected by the Martian Moons eXploration mission in the future.

  11. Global vertical distribution of water vapor on Mars: Results from 3.5 years of ExoMars‐TGO/NOMAD science operations Peer-reviewed

    S. Aoki, A. C. Vandaele, F. Daerden, G. L. Villanueva, G. Liuzzi, R. T. Clancy, M. A. Lopez‐Valverde, A. Brines, I. R. Thomas, L. Trompet, J. T. Erwin, L. Neary, S. Robert, A. Piccialli, J. A. Holmes, M. R. Patel, N. Yoshida, J. Whiteway, M. D. Smith, B. Ristic, G. Bellucci, J. J. Lopez‐Moreno, A. A. Fedorova

    Journal of Geophysical Research: Planets　2022/09/15

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022je007231 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  12. The deuterium isotopic ratio of water released from the Martian caps as measured with TGO/NOMAD Peer-reviewed

    Geronimo L. Villanueva, Giuliano Liuzzi, Shohei Aoki, Shane W. Stone, Adrian Brines, Ian R. Thomas, Miguel Angel Lopez‐Valverde, Loic Trompet, Justin Erwin, Frank Daerden, Bojan Ristic, Michael D. Smith, Michael J. Mumma, Sara Faggi, Vincent Kofman, Séverine Robert, Lori Neary, Manish Patel, Giancarlo Bellucci, J.‐J. Lopez‐Moreno, Ann Carine Vandaele

    Geophysical Research Letters　2022/06/06

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022gl098161 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  13. Density and temperature of the upper mesosphere and lower thermosphere of Mars retrieved from the OI 557.7 nm dayglow measured by TGO/NOMAD Peer-reviewed

    S. Aoki, L. Gkouvelis, J.‐C. Gérard, L. Soret, B. Hubert, M. A. Lopez‐Valverde, F. González‐Galindo, H. Sagawa, I. R. Thomas, B. Ristic, Y. Willame, C. Depiesse, J. Mason, M. R. Patel, G. Bellucci, J.‐J. Lopez‐Moreno, F. Daerden, A. C. Vandaele

    Journal of Geophysical Research: Planets　127　(6)　2022/05/26

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022JE007206 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  14. Martian water loss to space enhanced by regional dust storms Peer-reviewed

    M. S. Chaffin, D. M. Kass, S. Aoki, A. A. Fedorova, J. Deighan, K. Connour, N. G. Heavens, A. Kleinböhl, S. K. Jain, J.-Y. Chaufray, M. Mayyasi, J. T. Clarke, A. I. F. Stewart, J. S. Evans, M. H. Stevens, W. E. McClintock, M. M. J. Crismani, G. M. Holsclaw, F. Lefevre, D. Y. Lo, F. Montmessin, N. M. Schneider, B. Jakosky, G. Villanueva, G. Liuzzi, F. Daerden, I. R. Thomas, J.-J. Lopez-Moreno, M. R. Patel, G. Bellucci, B. Ristic, J. T. Erwin, A. C. Vandaele, A. Trokhimovskiy, O. I. Korablev

    Nature Astronomy　2021/08/16

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41550-021-01425-w 　

    eISSN： 2397-3366

  15. Annual Appearance of Hydrogen Chloride on Mars and a Striking Similarity With the Water Vapor Vertical Distribution Observed by TGO/NOMAD Peer-reviewed

    S. Aoki, F. Daerden, S. Viscardy, I. R. Thomas, J. T. Erwin, S. Robert, L. Trompet, L. Neary, G. L. Villanueva, G. Liuzzi, M. M. J. Crismani, R. T. Clancy, J. Whiteway, F. Schmidt, M. A. Lopez‐Valverde, B. Ristic, M. R. Patel, G. Bellucci, J.‐J. Lopez‐Moreno, K. S. Olsen, F. Lefèvre, F. Montmessin, A. Trokhimovskiy, A. A. Fedorova, O. Korablev, A. C. Vandaele

    Geophysical Research Letters　48　(11)　2021/06

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2021gl092506 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  16. First Observation of the Oxygen 630 nm Emission in the Martian Dayglow Peer-reviewed

    J.‐C. Gérard, S. Aoki, L. Gkouvelis, L. Soret, Y. Willame, I. R. Thomas, C. Depiesse, B. Ristic, A. C. Vandaele, B. Hubert, F. Daerden, M. R. Patel, J.‐J. López‐Moreno, G. Bellucci, J. P. Mason, M. A. López‐Valverde

    Geophysical Research Letters　48　(8)　2021/04/28

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2020gl092334 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  17. Transient HCl in the atmosphere of Mars Peer-reviewed

    Oleg Korablev, Kevin S. Olsen, Alexander Trokhimovskiy, Franck Lefèvre, Franck Montmessin, Anna A. Fedorova, Michael J. Toplis, Juan Alday, Denis A. Belyaev, Andrey Patrakeev, Nikolay I. Ignatiev, Alexey V. Shakun, Alexey V. Grigoriev, Lucio Baggio, Irbah Abdenour, Gaetan Lacombe, Yury S. Ivanov, Shohei Aoki, Ian R. Thomas, Frank Daerden, Bojan Ristic, Justin T. Erwin, Manish Patel, Giancarlo Bellucci, Jose Juan Lopez-Moreno, Ann C. Vandaele

    Science Advances　7　(7)　2021/02/10

    DOI： 10.1126/sciadv.abe4386 　

    eISSN： 2375-2548

  18. Water heavily fractionated as it ascends on Mars as revealed by ExoMars/NOMAD Peer-reviewed

    Geronimo L. Villanueva, Giuliano Liuzzi, Matteo M.J. Crismani, Shohei Aoki, Ann Carine Vandaele, Frank Daerden, Michael D. Smith, Michael J. Mumma, Elise W. Knutsen, Lori Neary, Sebastien Viscardy, Ian R. Thomas, Miguel Angel Lopez-Valverde, Bojan Ristic, Manish R. Patel, James A. Holmes, Giancarlo Bellucci, Jose Juan Lopez-Moreno

    Science Advances　7　(7)　2021/02/10

    DOI： 10.1126/sciadv.abc8843 　

    eISSN： 2375-2548

  19. Detection of green line emission in the dayside atmosphere of Mars from NOMAD-TGO observations Peer-reviewed

    J. -C. Gerard, S. Aoki, Y. Willame, L. Gkouvelis, C. Depiesse, I. R. Thomas, B. Ristic, A. C. Vandaele, F. Daerden, B. Hubert, J. Mason, M. R. Patel, J. -J. Lopez-Moreno, G. Bellucci, M. A. Lopez-Valverde, B. Beeckman

    NATURE ASTRONOMY　4　(11)　1049-1052　2020/11

    DOI： 10.1038/s41550-020-1123-2 　

    ISSN： 2397-3366

  20. Explanation for the Increase in High-Altitude Water on Mars Observed by NOMAD During the 2018 Global Dust Storm Peer-reviewed

    Neary, L., Daerden, F., Aoki, S., Whiteway, J., Clancy, R.T., Smith, M., Viscardy, S., Erwin, J.T., Thomas, I.R., Villanueva, G., Liuzzi, G., Crismani, M., Wolff, M., Lewis, S.R., Holmes, J.A., Patel, M.R., Giuranna, M., Depiesse, C., Piccialli, A., Robert, S., Trompet, L., Willame, Y., Ristic, B., Vandaele, A.C.

    Geophysical Research Letters　47　(7)　2020

    DOI： 10.1029/2019GL084354 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  21. Water Vapor Vertical Profiles on Mars in Dust Storms Observed by TGO/NOMAD Peer-reviewed

    S. Aoki, Ann Carine Vandaele, F. Daerden, G. L. Villanueva, G. Liuzzi, I. R. Thomas, J. T. Erwin, L. Trompet, S. Robert, L. Neary, S. Viscardy, R. T. Clancy, M. D. Smith, M. A. Lopez-Valverde, B. Hill, B. Ristic, M. R. Patel, G. Bellucci, J. J. Lopez-Moreno, Jose Juan López-Moreno, Gustavo Alonso-Rodrigo, Francesca Altieri, Sophie Bauduin, David Bolsée, Giacomo Carrozzo, Edward Cloutis, Matteo Crismani, Fabiana Da Pieve, Emiliano D’aversa, Cédric Depiesse, Giuseppe Etiope, Anna A. Fedorova, Bernd Funke, Didier Fussen, Maia Garcia-Comas, Anna Geminale, Jean Claude Gérard, Marco Giuranna, Leo Gkouvelis, Francisco Gonzalez-Galindo, James Holmes, Benoît Hubert, Nicolay I. Ignatiev, Jacek Kaminski, Ozgur Karatekin, Yasumasa Kasaba, David Kass, Armin Kleinböhl, Orietta Lanciano, Franck Lefèvre, Stephen Lewis, Manuel López-Puertas, Miguel López-Valverde, Arnaud Mahieux, Jon Mason, Daniel Mege, Michael J. Mumma, Hiromu Nakagawa, Eddy Neefs, Robert E. Novak, Fabrizio Oliva, Arianna Piccialli, Etienne Renotte, Birgit Ritter, Frédéric Schmidt, Nick Schneider, Giuseppe Sindoni, Nicholas A. Teanby, Ed Thiemann, Alexander Trokhimovskiy, Jean Vander Auwera, James Whiteway, Valerie Wilquet, Yannick Willame, Michael J. Wolff, Paulina Wolkenberg, Roger Yelle, Aparicio Del Moral Beatriz, Pascal Barzin, Bram Beeckman, Ali Benmoussa, Sophie Berkenbosch, David Biondi, Sabrina Bonnewijn, Gian Paolo Candini, Roland Clairquin, Javier Cubas, Boris Giordanengo, Samuel Gissot, Alejandro Gomez, Brijen Hathi, Jose Jeronimo Zafra, Mark Leese, Jeroen Maes, Emmanuel Mazy, Alexandra Mazzoli, Jose Meseguer, Rafael Morales, Anne Orban, M. Pastor-Morales

    Journal of Geophysical Research: Planets　124　(12)　3482-3497　2019/12/01

    DOI： 10.1029/2019JE006109 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  22. Martian dust storm impact on atmospheric H2O and D/H observed by ExoMars Trace Gas Orbiter Peer-reviewed

    Vandaele, A.C., Korablev, O., Daerden, F., Aoki, S., Thomas, I.R., Altieri, F., López-Valverde, M., Villanueva, G., Liuzzi, G., Smith, M.D., Erwin, J.T., Trompet, L., Fedorova, A.A., Montmessin, F., Trokhimovskiy, A., Belyaev, D.A., Ignatiev, N.I., Luginin, M., Olsen, K.S., Baggio, L., Alday, J., Bertaux, J.-L., Betsis, D., Bolsée, D., Clancy, R.T., Cloutis, E., Depiesse, C., Funke, B., Garcia-Comas, M., Gérard, J.-C., Giuranna, M., Gonzalez-Galindo, F., Grigoriev, A.V., Ivanov, Y.S., Kaminski, J., Karatekin, O., Lefèvre, F., Lewis, S., López-Puertas, M., Mahieux, A., Maslov, I., Mason, J., Mumma, M.J., Neary, L., Neefs, E., Patrakeev, A., Patsaev, D., Ristic, B., Robert, S., Schmidt, F., Shakun, A., Teanby, N.A., Viscardy, S., Willame, Y., Whiteway, J., Wilquet, V., Wolff, M.J., Bellucci, G., Patel, M.R., López-Moreno, J.-J., Forget, F., Wilson, C.F., Svedhem, H., Vago, J.L., Rodionov, D., Alonso-Rodrigo, G., Bauduin, S., Carrozzo, G., Crismani, M., Da Pieve, F., D’Aversa, E., Etiope, G., Fussen, D., Geminale, A., Gkouvelis, L., Holmes, J., Hubert, B., Kasaba, Y., Kass, D., Kleinböhl, A., Lanciano, O., Nakagawa, H., Novak, R.E., Oliva, F., Piccialli, A., Renotte, E., Ritter, B., Schneider, N., Sindoni, G., Thiemann, E., Vander Auwera, J., Wolkenberg, P., Yelle, R., Anufreychik, K., Arnold, G., Bertaux, J.-L., Duxbury, N., Fouchet, T., Grassi, D., Guerlet, S., Hartogh, P., Khatuntsev, I., Kokonkov, N., Krasnopolsky, V., Kuzmin, R., Lacombe, G., Lellouch, E., Määttänen, A., Marcq, E., Martin-Torres, J., Medvedev, A., Millour, E., Moshkin, B., Patel, M.R., Quantin-Nataf, C., Rodin, A., Shematovich, V., Thomas, N., Trokhimovsky, A., Vazquez, L., Vincendon, M., Young, R., Zasova, L., Zelenyi, L., Zorzano, M.P.

    Nature　568　(7753)　521-525　2019

    DOI： 10.1038/s41586-019-1097-3 　

    ISSN： 0028-0836

    eISSN： 1476-4687

  23. No detection of methane on Mars from early ExoMars Trace Gas Orbiter observations Peer-reviewed

    Korablev, O., Vandaele, A.C., Montmessin, F., Fedorova, A.A., Trokhimovskiy, A., Forget, F., Lefèvre, F., Daerden, F., Thomas, I.R., Trompet, L., Erwin, J.T., Aoki, S., Robert, S., Neary, L., Viscardy, S., Grigoriev, A.V., Ignatiev, N.I., Shakun, A., Patrakeev, A., Belyaev, D.A., Bertaux, J.-L., Olsen, K.S., Baggio, L., Alday, J., Ivanov, Y.S., Ristic, B., Mason, J., Willame, Y., Depiesse, C., Hetey, L., Berkenbosch, S., Clairquin, R., Queirolo, C., Beeckman, B., Neefs, E., Patel, M.R., Bellucci, G., López-Moreno, J.-J., Wilson, C.F., Etiope, G., Zelenyi, L., Svedhem, H., Vago, J.L., Alonso-Rodrigo, G., Altieri, F., Anufreychik, K., Arnold, G., Bauduin, S., Bolsée, D., Carrozzo, G., Clancy, R.T., Cloutis, E., Crismani, M., Da Pieve, F., D’Aversa, E., Duxbury, N., Encrenaz, T., Fouchet, T., Funke, B., Fussen, D., Garcia-Comas, M., Gérard, J.-C., Giuranna, M., Gkouvelis, L., Gonzalez-Galindo, F., Grassi, D., Guerlet, S., Hartogh, P., Holmes, J., Hubert, B., Kaminski, J., Karatekin, O., Kasaba, Y., Kass, D., Khatuntsev, I., Kleinböhl, A., Kokonkov, N., Krasnopolsky, V., Kuzmin, R., Lacombe, G., Lanciano, O., Lellouch, E., Lewis, S., Luginin, M., Liuzzi, G., López-Puertas, M., López-Valverde, M., Määttänen, A., Mahieux, A., Marcq, E., Martin-Torres, J., Maslov, I., Medvedev, A., Millour, E., Moshkin, B., Mumma, M.J., Nakagawa, H., Novak, R.E., Oliva, F., Patsaev, D., Piccialli, A., Quantin-Nataf, C., Renotte, E., Ritter, B., Rodin, A., Schmidt, F., Schneider, N., Shematovich, V., Smith, M.D., Teanby, N.A., Thiemann, E., Thomas, N., Vander Auwera, J., Vazquez, L., Villanueva, G., Vincendon, M., Whiteway, J., Wilquet, V., Wolff, M.J., Wolkenberg, P., Yelle, R., Young, R., Zasova, L., Zorzano, M.P.

    Nature　568　(7753)　517-520　2019

    DOI： 10.1038/s41586-019-1096-4 　

    ISSN： 0028-0836

    eISSN： 1476-4687

  24. Independent confirmation of a methane spike on Mars and a source region east of Gale Crater Peer-reviewed

    Giuranna, M., Viscardy, S., Daerden, F., Neary, L., Etiope, G., Oehler, D., Formisano, V., Aronica, A., Wolkenberg, P., Aoki, S., Cardesín-Moinelo, A., Marín-Yaseli de la Parra, J., Merritt, D., Amoroso, M.

    Nature Geoscience　12　(5)　326-332　2019

    DOI： 10.1038/s41561-019-0331-9 　

    ISSN： 1752-0894

    eISSN： 1752-0908

  25. Mesospheric CO2 ice clouds on Mars observed by Planetary Fourier Spectrometer onboard Mars Express Peer-reviewed

    S. Aoki, Y. Sato, M. Giuranna, P. Wolkenberg, T. M. Sato, H. Nakagawa, Y. Kasaba

    Icarus　302　175-190　2018/03/01

    DOI： 10.1016/j.icarus.2017.10.047 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  26. Stringent upper limit of CH4 on Mars based on SOFIA/EXES observations Peer-reviewed

    S. Aoki, M. J. Richter, C. Dewitt, A. Boogert, T. Encrenaz, H. Sagawa, H. Nakagawa, A. C. Vandaele, M. Giuranna, T. K. Greathouse, T. Fouchet, A. Geminale, G. Sindoni, M. McKelvey, M. Case, Y. Kasaba

    Astronomy and Astrophysics　610　2018/02/01

    DOI： 10.1051/0004-6361/201730903 　

    ISSN： 0004-6361

    eISSN： 1432-0746

  27. Seasonal variation of the HDO/H2O ratio in the atmosphere of Mars at the middle of northern spring and beginning of northern summer Peer-reviewed

    Shohei Aoki, Hiromu Nakagawa, Hideo Sagawa, Marco Giuranna, Giuseppe Sindoni, Alessandro Aronica, Yasumasa Kasaba

    Icarus　260　7-22　2015/11/01

    DOI： 10.1016/j.icarus.2015.06.021 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  28. Search for hydrogen peroxide in the martian atmosphere by the planetary fourier spectrometer onboard mars express Peer-reviewed

    Shohei Aoki, Marco Giuranna, Yasumasa Kasaba, Hiromu Nakagawa, Giuseppe Sindoni, Anna Geminale, Vittorio Formisano

    Icarus　245　177-183　2015/01/01

    DOI： 10.1016/j.icarus.2014.09.034 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  29. Upper limits of CH4 and OCS in the Martian atmosphere from NOMAD/TGO solar occultation: A study of vertical averaging and systematic uncertainties Peer-reviewed

    M. Escudero-Jiménez, M.A. López-Valverde, J. Peralta, T. Moya, A. Belmonte, A. Brines, I. Thomas, G. Villanueva, G. Liuzzi, E. Knutsen, S. Viscardy, F. González-Galindo, A. Modak, B. Funke, J.J. López-Moreno, J. Rodríguez, R. Sanz, F. Daerden, L. Trompet, A.S.J. Khayat, S. Aoki, B. Ristic, M.R. Patel, G. Bellucci, A.C. Vandaele

    Icarus　448　116923-116923　2026/04

    Publisher: Elsevier BV

    DOI： 10.1016/j.icarus.2025.116923 　

    ISSN： 0019-1035

  30. The MMX InfraRed Spectrometer (MIRS) for the spectral characterization of the Martian system Peer-reviewed

    Maria Antonietta Barucci, Pernelle Bernardi, Jean-Michel Reess, Sonia Fornasier, Frederic Merlin, Alain Doressoundiram, Thomas Gautier, Takahiro Iwata, Hiromu Nakagawa, Tomoki Nakamura, Christophe Donny, Sadok Abbaki, Shohei Aoki, Takehiko Arai, Pierre Beck, Marion Bonafous, Martin Boutelier, Jean-Christophe Bouquier, John Robert Brucato, Mickael Bruno, Jean-Tristan Buey, Matthieu Castelnau, Sebastien Charnoz, Marc Chaussidon, Frederic Chapron, Athena Coustenis, Willy D’anna, Gael David, Marco Delbo, Bruno Dubois, Sebastien Etcheverry, Catherine Garat, Stephane Gauffre, Hidenori Genda, Fabrice Glize, Rafik Hassen-Khodja, Valentin Hazard, Gilles Hervet, Ryuki Hyodo, Takeshi Imamura, Christian Imbert, Sophie Jacquinod, Laurent Jorda, Shingo Kameda, Driss Kouach, Toru Kouyama, Takeshi Kuroda, Hiroyuki Kurokawa, Laurent Lapauw, Jeremie Lasue, Laetitia Le Deit, Michel Le Du, Cedric Leyrat, Christophe Mathé, Moe Matsuoka, Maeva Millan, Hideaki Miyamoto, Frederic Moynier, Napoléon Nguyen Tuong, Kazunori Ogohara, Takahito Osawa, Jerome Parisot, Paolo Pilleri, Veronique Piou, Giovanni Poggiali, Nathalie Pons, Benjamin Quertier-Dagorn, Antsa Rasamoela, Sean Raymond, Francis Rocard, Anne Rouvié, Takeshi Sakanoi, Takao M. Sato, Hervé Soulie, Eric Sawyer, Aymeric Spiga, Robin Sultana, Nicolas Theret, Sylvain Trémolières, Pascal Truchelut, Fuminori Tsuchiya, Pierre Vernazza, Antonin Wargnier, Koki Yumoto, Didier Zeganadin

    Progress in Earth and Planetary Science　12　(1)　2025/08/19

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1186/s40645-025-00746-y 　

    eISSN： 2197-4284

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    Abstract MIRS (MMX InfraRed Spectrometer) is a push-broom imaging spectrometer onboard of the JAXA sample return MMX mission. It has been built by the French laboratory LESIA, today LIRA (Laboratory for Instrumentation and Research in Astrophysics) of Paris Observatory-PSL in collaboration with five other French laboratories, collaboration and financial support of CNES and close collaboration with JAXA and MELCO. MIRS, designed to accomplish the MMX scientific objectives, has been built to be adapted on MMX Exploration Module. MIRS will remotely observe the Martian system for three years. MIRS will observe Phobos, Deimos and Mars in the spectral range 0.9–3.6 µm to characterize surface composition of the satellites and investigate Martian atmospheric variations. An overview of the MIRS Flight Model is presented as well as the data processing and the expected results.

  31. Temporal variation in the cloud-top temperature of Venus revealed by meteorological satellites Peer-reviewed

    Gaku Nishiyama, Yudai Yudai, Shinsuke Uno, Shohei Aoki, Tatsuro Iwanaka, Takeshi Imamura, Yuka Fujii, Thomas G. Müller, Makoto Taguchi, Toru Kouyama, Océane Barraud, Mario D’Amore, Jörn Helber, Solmaz Adeli, Harald Hiesinger

    Earth Planets Space 77, 91　2025/06/30

    DOI： 10.1186/s40623-025-02223-8 　

  32. Large Water Inventory in Highly Adsorptive Regolith Simulated With a Mars Global Climate Model Peer-reviewed

    M. Kobayashi, A. Kamada, T. Kuroda, H. Kurokawa, S. Aoki, H. Nakagawa, N. Terada

    Journal of Geophysical Research: Planets　130　(2)　2025/02

    DOI： 10.1029/2024JE008697 　

  33. Scientific objectives and instrumental requirements of the IR spectrometer VenSpec-H onboard EnVision Peer-reviewed

    Séverine Robert, Justin T. Erwin, Roderick De Cock, Ian R. Thomas, Nuno Pereira, Lars Jacobs, Sophie Berkenbosch, David Bolsée, Filip Vanhellemont, Eddy Neefs, Shohei Aoki, Bruno Bézard, Emmanuel Marcq, Giulia Alemanno, Joern Helbert, Ann C. Vandaele

    Infrared Remote Sensing and Instrumentation XXXII　35-35　2024/10/03

    Publisher: SPIE

    DOI： 10.1117/12.3027948 　

  34. Mars’ Water Cycle and Escape: A View from Mars Express and Beyond Peer-reviewed

    F. Montmessin, A. Fedorova, J. Alday, S. Aoki, M. Chaffin, J.-Y. Chaufray, T. Encrenaz, T. Fouchet, E. W. Knutsen, O. Korablev, G. Liuzzi, M. A. Mayyasi, A. Pankine, A. Trokhimovskiy, G. L. Villanueva

    Space Science Reviews　220　(7)　2024/09/30

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1007/s11214-024-01099-6 　

    ISSN： 0038-6308

    eISSN： 1572-9672

  35. Composition and Chemistry of the Martian Atmosphere as Observed by Mars Express and ExoMars Trace Gas Orbiter

    Ann C. Vandaele, Shohei Aoki, Sophie Bauduin, Frank Daerden, Anna Fedorova, Marco Giuranna, Oleg Korablev, Franck Lefèvre, Anni Määttänen, Franck Montmessin, Manish R. Patel, Michael Smith, Loïc Trompet, Sébastien Viscardy, Yannick Willame, Nao Yoshida

    Space Science Reviews　220　(7)　2024/09/24

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1007/s11214-024-01109-7 　

    ISSN： 0038-6308

    eISSN： 1572-9672

  36. Overview of the LAPYUTA mission (Life-environmentology, Astronomy, and PlanetarY Ultraviolet Telescope Assembly)

    Fuminori Tsuchiya, Go Murakami, Atsushi Yamazaki, Shingo Kameda, Tomoki Kimura, Ryoichi Koga, Kei Masunaga, Shotaro Sakai, Masahiro Ikoma, Akifumi Nakayama, Masami Ouchi, Masaomi Tanaka, Shin Toriumi, Masato Kagitani, Kazuo Yoshioka, Chihiro Tao, Hajime Kita, Hidenobu Yajima, Hideo Sagawa, Hiromu Nakagawa, Hitoshi Hamori, Jun Kimura, Keigo Enya, Kosuke Namekata, Manabu Yamada, Masaki Kuwabara, Naoki Terada, Naoya Ozaki, Norio Narita, Sae Aizawa, Seiko Takagi, Shinitiro Sakai, Shohei Aoki, Shoya Matsuda, Shuya Tan, Takahiro Sumi, Takanori Kodama, Takashi Moriya, Takatoshi Shibuya, Takehiko Satoh, Taro Kawano, Nozomu Tominaga, Toshifumi Shimizu, Yasumasa Kasaba, Yoichi Yatsu, Yoshiaki Ono, Yudai Suzuki, Yuichi Matsuda, Yuki Harada, Yuta Notsu

    Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray　18-18　2024/08/21

    Publisher: SPIE

    DOI： 10.1117/12.3017298 　

  37. Strong Localized Pumping of Water Vapor to High Altitudes on Mars During the Perihelion Season Peer-reviewed

    A. Brines, M. A. López‐Valverde, B. Funke, F. González‐Galindo, S. Aoki, G. L. Villanueva, J. A. Holmes, D. A. Belyaev, G. Liuzzi, I. R. Thomas, J. T. Erwin, U. Grabowski, F. Forget, J. J. Lopez‐Moreno, J. Rodriguez‐Gomez, F. Daerden, L. Trompet, B. Ristic, M. R. Patel, G. Bellucci, A. C. Vandaele

    Geophysical Research Letters　51　(14)　2024/07/19

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2023gl107224 　

    ISSN： 0094-8276

    eISSN： 1944-8007

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    Abstract Here we present water vapor vertical profiles observed with the ExoMars Trace Gas Orbiter/Nadir and Occultation for MArs Discovery instrument during the perihelion and Southern summer solstice season (LS = 240°–300°) in three consecutive Martian Years 34, 35, and 36. We show the detailed latitudinal distribution of H2O at tangent altitudes from 10 to 120 km, revealing a vertical plume at 60°S–50°S injecting H2O upward, reaching abundance of about 50 ppmv at 100 km. We have observed this event repeatedly in the three Martian years analyzed, appearing at LS = 260°–280° and showing inter‐annual variations in the magnitude and timing due to long term effects of the Martian Year 34 Global Dust Storm. We provide a rough estimate of projected hydrogen escape of 3.2 × 109 cm−2 s−1 associated to these plumes, adding further evidence of the key role played by the perihelion season in the long term evolution of the planet's climate.

  38. Heterogeneous Processes in the Atmosphere of Mars and Impact on H2O2 and O3 Abundances Peer-reviewed

    Frank Daerden, John N. Crowley, Lori Neary, Michael D. Smith, Mark J. Loeffler, R. Todd Clancy, Michael J. Wolff, Shohei Aoki, Hideo Sagawa

    Journal of Geophysical Research: Planets　128　(12)　2023/12/06

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2023je008014 　

    ISSN： 2169-9097

    eISSN： 2169-9100

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    Abstract Current models underestimate the highest observed ozone (O3) column densities on Mars. These estimates could be improved by including the uptake of odd hydrogen species (HOx) on water ice clouds, but the reported uptake coefficient of HO2 is likely overestimated for atmospheric conditions. This leaves a fundamental problem in Mars' atmospheric chemistry unsolved. Here, using the GEM‐Mars general circulation model, we explore a range of processes involving multiple phases (gas, adsorbed and solid) that may contribute to an alternative solution. First, we focus on hydrogen peroxide (H2O2) and discuss its physical states on Mars and its chemical impact. We also conjecture its photolytic destruction in ices with model simulations and Compact Reconnaissance Imaging Spectrometer for Mars observations. Then, we include in the model all relevant (for Mars) heterogeneous reactions, both on dust and water ice, recommended by the International Union of Pure and Applied Chemistry for terrestrial atmospheric studies. We find that only the uptake of HO2 and H2O2 on dust are efficient on Mars. Finally, we find that attenuation of sunlight by water ice clouds in the calculation of photolysis rates leads to increased O3 and H2O2 abundances below the ice clouds. The combination of the proposed processes leads to O3 increases without the need for strong uptake of HO2 on ice, but it remains difficult to find a good agreement with O3 and H2O2 observations on the global scale. We provide specific recommendations for future work in observations, laboratory experiments and modeling to advance our understanding of fundamental chemistry on Mars.

  39. Numerical Prediction of Changes in Atmospheric Chemical Compositions During a Solar Energetic Particle Event on Mars Peer-reviewed

    Yuki Nakamura, François Leblanc, Naoki Terada, Sayano Hiruba, Isao Murata, Hiromu Nakagawa, Shotaro Sakai, Shohei Aoki, Arianna Piccialli, Yannick Willame, Lori Neary, Ann Carine Vandaele, Kiyoka Murase, Ryuho Kataoka

    Journal of Geophysical Research: Space Physics　128　(12)　2023/12/06

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022ja031250 　

    ISSN： 2169-9380

    eISSN： 2169-9402

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    Abstract Precipitation of solar energetic particles (SEPs) into planetary atmospheres causes changes in atmospheric chemical composition through ionization, dissociation, and excitation of atmospheric molecules. In contrast to the terrestrial atmosphere, where depletion of ozone in the polar mesosphere has been studied by observations and models for decades, there have been no studies on the effects of SEPs on the neutral chemical composition of Mars' present‐day atmosphere. This study provided the first estimate of the impacts of SEPs on neutral chemical composition in the present‐day Martian atmosphere coupling a Monte Carlo model and a one‐dimensional photochemical model. Our results showed that ozone density in the Martian atmosphere might decrease in the altitude range of 20–60 km with a factor 10 maximum enhancement occurring at 40 km during a Halloween‐class SEP event due to an enhanced concentration of HOx. The depletion of ozone occurred in the altitude range of 20–60 km, corresponding to the penetration of protons with an energy range of 4.6–46 MeV. Such ozone depletion should be detected by Trace Gas Orbiter/Nadir and Occultation for MArs Discovery during intense SEP event. A 75% depletion of the ozone density at 40 km can be expected during SEP events occurring once in every 1 year. Therefore, ozone concentration in the Martian atmosphere might sufficiently decrease during a SEP event as on Earth, but through different chemical pathways driven by CO2 ionization and CO recombination catalytic cycle.

  40. Martian Atmospheric Aerosols Composition and Distribution Retrievals During the First Martian Year of NOMAD/TGO Solar Occultation Measurements: 2. Extended Results, End of MY 34 and First Half of MY 35 Peer-reviewed

    Aurélien Stolzenbach, Miguel‐Angel López Valverde, Adrian Brines, Ashimananda Modak, Bernd Funke, Francisco González‐Galindo, Ian Thomas, Giuliano Liuzzi, Gerónimo Villanueva, Mikhail Luginin, Shohei Aoki, Udo Grabowski, José Juan Lopez Moreno, Julio Rodriguez‐Gomez, Mike Wolff, Bojan Ristic, Frank Daerden, Giancarlo Bellucci, Manish Patel, Ann‐Carine Vandaele

    Journal of Geophysical Research: Planets　128　(11)　2023/11/20

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2023je007835 　

    ISSN： 2169-9097

    eISSN： 2169-9100

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    Abstract This is the second part of Stolzenbach et al. (2023, https://doi.org/10.1029/2022JE007276), named hereafter Paper I, extends the period to the end of MY 34 and the first half of MY 35. This encompasses the end phase of the MY 34 Global Dust Storm (GDS), the MY 34 C‐Storm, the Aphelion Cloud Belt (ACB) season of MY 35, and an unusual early dust event of MY 35 from LS 30° to LS 55°. The end of MY 34 overall aerosol size distribution shows the same parameters for dust and water ice to what was seen during the MY 34 GDS. Interestingly, the layered water ice vertical structure of MY 34 GDS disappears. The MY 34 C‐Storm maintains condition like the MY 34 GDS. A high latitude layer of bigger water ice particles, close to 1 μm, is seen from 50 to 60 km. This layered structure is linked to an enhanced meridional transport characteristic of high intensity dust event which put the MY 34 C‐Storm as particularly intense compared to non‐GDS years C‐Storms as previously suggested by Holmes et al. (2021, https://doi.org/10.1016/j.epsl.2021.117109). Surprisingly, MY 35 began with an unusually large dust event (Kass et al., 2020, https://ui.adsabs.harvard.edu/abs/2020AGUFMP039…01K) found in the Northern hemisphere during LS 35° to LS 50°. During this dust event, the altitude of aerosol first detection is roughly equal to 20 km. This is close to the values encountered during the MY 34 GDS, its decay phase and the C‐Storm of the same year. Nonetheless, no vertical layered structure was observed.

  41. Martian Atmospheric Aerosols Composition and Distribution Retrievals During the First Martian Year of NOMAD/TGO Solar Occultation Measurements: 1. Methodology and Application to the MY 34 Global Dust Storm Peer-reviewed

    Aurélien Stolzenbach, Miguel‐Angel López Valverde, Adrian Brines, Ashimananda Modak, Bernd Funke, Francisco González‐Galindo, Ian Thomas, Giuliano Liuzzi, Gerónimo Villanueva, Mikhail Luginin, Shohei Aoki, Udo Grabowski, José Juan Lopez Moreno, Julio Rodrìguez Gòmez, Mike Wolff, Bojan Ristic, Frank Daerden, Giancarlo Bellucci, Manish Patel, Ann‐Carine Vandaele

    Journal of Geophysical Research: Planets　128　(11)　2023/11/20

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022je007276 　

    ISSN： 2169-9097

    eISSN： 2169-9100

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    Abstract Since the beginning of the Trace Gas Orbiter (TGO) science operations in April 2018, its instrument “Nadir and Occultation for MArs Discovery” (NOMAD) supplies detailed observations of the IR spectrums of the Martian atmosphere. We developed a procedure that allows us to evaluate the composition and distribution's parameters of the atmospheric Martian aerosols. We use a retrieval program (RCP) in conjunction with a radiative forward model (KOPRA) to evaluate the vertical profile of aerosol extinction from NOMAD measurements. We then apply a model/data fitting strategy of the aerosol extinction. In this first article, we describe the method used to evaluate the parameters representing the Martian aerosol composition and size distribution. MY 34 GDS showed a peak intensity from LS 190° to 210°. During this period, the aerosol content rises multiple scale height, reaching altitudes up to 100 km. The lowermost altitude of aerosol's detection during NOMAD observation rises up to 30 km. Dust aerosols reff were observed to be close to 1 μm and its νeff lower than 0.2. Water ice aerosols reff were observed to be submicron with a νeff lower than 0.2. The vertical aerosol structure can be divided in two parts. The lower layers are represented by higher reff than the upper layers. The change between the lower and upper layers is very steep, taking only few kilometers. The decaying phase of the GDS, LS 210°–260°, shows a decrease in altitude of the aerosol content but no meaningful difference in the observed aerosol's size distribution parameters.

  42. Update on SO2, detection of OCS, CS, CS2, and SO3, and upper limits of H2S and HOCl in the Venus mesosphere using SOIR on board Venus Express Invited

    A. Mahieux, S. Robert, F.P. Mills, K.L. Jessup, L. Trompet, S. Aoki, A. Piccialli, J. Peralta, A.C. Vandaele

    Icarus　399　115556-115556　2023/07

    Publisher: Elsevier BV

    DOI： 10.1016/j.icarus.2023.115556 　

    ISSN： 0019-1035

  43. Martian Ozone Observed by TGO/NOMAD‐UVIS Solar Occultation: An Inter‐Comparison of Three Retrieval Methods Peer-reviewed

    A. Piccialli, A. C. Vandaele, Y. Willame, A. Määttänen, L. Trompet, J. T. Erwin, F. Daerden, L. Neary, S. Aoki, S. Viscardy, I. R. Thomas, C. Depiesse, B. Ristic, J. P. Mason, M. R. Patel, M. J. Wolff, A. S. J. Khayat, G. Bellucci, J.‐J. Lopez‐Moreno

    Earth and Space Science　10　(2)　2023/02/21

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022ea002429 　

    ISSN： 2333-5084

    eISSN： 2333-5084

  44. Carbon dioxide retrievals from NOMAD‐SO on ESA’s ExoMars Trace Gas Orbiter and temperature profiles retrievals with the hydrostatic equilibrium equation. II. Temperature variabilities in the mesosphere at Mars terminator. Peer-reviewed

    L. Trompet, A.C. Vandaele, I. Thomas, S. Aoki, F. Daerden, J. Erwin, Z. Flimon, A. Mahieux, L. Neary, S. Robert, G. Villanueva, G. Liuzzi, Lopez Valverde, A. Brines, G. Bellucci, J. J. Lopez‐Moreno, M. R. Patel

    Journal of Geophysical Research: Planets　2023/02/14

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022je007279 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  45. Carbon dioxide retrievals from NOMAD‐SO on ESA’s ExoMars Trace Gas Orbiter and temperature profiles retrievals with the hydrostatic equilibrium equation. I. Description of the method Peer-reviewed

    L. Trompet, A.C. Vandaele, I. Thomas, S. Aoki, F. Daerden, J. Erwin, Z. Flimon, A. Mahieux, L. Neary, S. Robert, G. Villanueva, G. Liuzzi, Lopez‐Valverde, A. Brines, G. Bellucci, J. J. Lopez‐Moreno, M. R. Patel

    Journal of Geophysical Research: Planets　2023/02/13

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022je007277 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  46. Retrieval of Martian atmospheric CO vertical profiles from NOMAD observations during the 1st year of TGO operations Peer-reviewed

    Ashimananda Modak, Miguel Angel López‐Valverde, Adrian Brines, Aurélien Stolzenbach, Bernd Funke, Francisco González‐Galindo, Brittany Hill, Shohei Aoki, Ian Thomas, Giuliano Liuzzi, Gerónimo Villanueva, Justin Erwin, José Juan Lopez Moreno, Nao Yoshida, Udo Grabowski, Francois Forget, Frank Daerden, Bojan Ristic, Giancarlo Bellucci, Manish Patel, Loic Trompet, Ann‐Carine Vandaele

    Journal of Geophysical Research: Planets　2023/02/11

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022je007282 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  47. Water vapor vertical distribution on Mars during perihelion season of MY 34 and MY 35 with ExoMars‐TGO/NOMAD observations Peer-reviewed

    A. Brines, M. A. López‐Valverde, A. Stolzenbach, A. Modak, B. Funke, F. G. Galindo, S. Aoki, G. L. Villanueva, G. Liuzzi, I. R. Thomas, J. T. Erwin, U. Grabowski, F. Forget, J. J. Lopez‐Moreno, J. Rodriguez‐Gomez, F. Daerden, L. Trompet, B. Ristic, M. R. Patel, G. Bellucci, A. C. Vandaele

    Journal of Geophysical Research: Planets　2022/12/26

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022je007273 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  48. Martian atmospheric temperature and density profiles during the 1st year of NOMAD/TGO solar occultation measurements Peer-reviewed

    Miguel‐Angel López Valverde, Bernd Funke, Adrian Brines, Aurèlien Stolzenbach, Ashimananda Modak, Brittany Hill, Francisco González‐Galindo, Ian Thomas, Loic Trompet, Shohei Aoki, Gerónimo Villanueva, Giuliano Liuzzi, Justin Erwin, Udo Grabowski, Francois Forget, José Juan Lopez Moreno, Julio Rodriguez‐Gómez, Bojan Ristic, Frank Daerden, Giancarlo Bellucci, Manish Patel, Ann‐Carine Vandaele

    Journal of Geophysical Research: Planets　2022/11/14

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022je007278 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  49. Global variations in water vapour and saturation state throughout the Mars Year 34 dusty season Peer-reviewed

    J. A. Holmes, S. R. Lewis, M. R. Patel, J. Alday, S. Aoki, G. Liuzzi, G. L. Villanueva, M. M. J. Crismani, A. A. Fedorova, K. S. Olsen, D. M. Kass, A. C. Vandaele, O. Korablev

    Journal of Geophysical Research: Planets　2022/10/09

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022je007203 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  50. Planet‐Wide Ozone Destruction in the Middle Atmosphere on Mars During Global Dust Storm Peer-reviewed

    F. Daerden, L. Neary, M. J. Wolff, R. T. Clancy, F. Lefèvre, J. A. Whiteway, S. Viscardy, A. Piccialli, Y. Willame, C. Depiesse, S. Aoki, I. R. Thomas, B. Ristic, J. Erwin, J.‐C. Gérard, B. J. Sandor, A. Khayat, M. D. Smith, J. P. Mason, M. R. Patel, G. L. Villanueva, G. Liuzzi, G. Bellucci, J.‐J. Lopez‐Moreno, A. C. Vandaele

    Geophysical Research Letters　49　(11)　2022/06/16

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022gl098821 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  51. Variations in Vertical CO/CO 2 Profiles in the Martian Mesosphere and Lower Thermosphere Measured by the ExoMars TGO/NOMAD: Implications of Variations in Eddy Diffusion Coefficient Peer-reviewed

    Nao Yoshida, Hiromu Nakagawa, Shohei Aoki, Justin Erwin, Ann Carine Vandaele, Frank Daerden, Ian Thomas, Loïc Trompet, Shungo Koyama, Naoki Terada, Lori Neary, Isao Murata, Geronimo Villanueva, Giuliano Liuzzi, Miguel Angel Lopez‐Valverde, Adrian Brines, Ashimananda Modak, Yasumasa Kasaba, Bojan Ristic, Giancarlo Bellucci, José Juan López‐Moreno, Manish Patel

    Geophysical Research Letters　49　(10)　2022/05/28

    Publisher: American Geophysical Union ({AGU})

    DOI： 10.1029/2022GL098485 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  52. The Mars oxygen visible dayglow: A MARTIAN YEAR OF NOMAD/UVIS OBSERVATIONS Peer-reviewed

    L. Soret, J.‐C. Gérard, S. Aoki, L. Gkouvelis, I. R. Thomas, B. Ristic, B. Hubert, Y. Willame, C. Depiesse, A.C. Vandaele, M. R. Patel, J. P. Mason, F. Daerden, J.‐J. López‐Moreno, G. Bellucci

    Journal of Geophysical Research: Planets　2022/05/24

    DOI： 10.1029/2022JE007220 　

  53. Milliarcsecond Astrometry for the Galilean Moons Using Stellar Occultations Peer-reviewed

    B. E. Morgado, A. R. Gomes-Júnior, F. Braga-Ribas, R. Vieira-Martins, J. Desmars, V. Lainey, E. D’aversa, D. Dunham, J. Moore, K. Baillié, D. Herald, M. Assafin, B. Sicardy, S. Aoki, J. Bardecker, J. Barton, T. Blank, D. Bruns, N. Carlson, R. W. Carlson, K. Cobble, J. Dunham, D. Eisfeldt, M. Emilio, C. Jacques, T. C. Hinse, Y. Kim, M. Malacarne, P. D. Maley, A. Maury, E. Meza, F. Oliva, G. S. Orton, C. L. Pereira, M. Person, C. Plainaki, R. Sfair, G. Sindoni, M. Smith, E. Sussenbach, P. Stuart, J. Vrolijk, O. C. Winter

    The Astronomical Journal　163　(5)　240-240　2022/05/01

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-3881/ac6108 　

    ISSN： 0004-6256

    eISSN： 1538-3881

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    Abstract A stellar occultation occurs when a Solar System object passes in front of a star for an observer. This technique allows the sizes and shapes of the occulting body to be determined with kilometer precision. In addition, this technique constrains the occulting body’s positions, albedos, densities, and so on. In the context of the Galilean moons, these events can provide their best ground-based astrometry, with uncertainties in the order of 1 mas (∼3 km at Jupiter’s distance during opposition). We organized campaigns and successfully observed a stellar occultation by Io (JI) in 2021, one by Ganymede (JIII) in 2020, and one by Europa (JII) in 2019, with stations in North and South America. We also re-analyzed two previously published events: one by Europa in 2016 and another by Ganymede in 2017. We then fit the known 3D shape of the occulting satellite and determine its center of figure. This resulted in astrometric positions with uncertainties in the milliarcsecond level. The positions obtained from these stellar occultations can be used together with dynamical models to ensure highly accurate orbits of the Galilean moons. These orbits can help when planning future space probes aiming at the Jovian system, such as JUICE by ESA and Europa Clipper by NASA. They also allow more efficient planning of flyby maneuvers.

  54. Calibration of the NOMAD-UVIS data Peer-reviewed

    Yannick Willame, Cédric Depiesse, Jonathon P. Mason, Ian R. Thomas, Manish R. Patel, Brijen Hathi, Mark R. Leese, David Bolsée, Michael J. Wolff, Loïc Trompet, Ann Carine Vandaele, Arianna Piccialli, Shohei Aoki, Bojan Ristic, Eddy Neefs, Bram Beeckman, Sophie Berkenbosch, Roland Clairquin, Arnaud Mahieux, Nuno Pereira, Séverine Robert, Sébastien Viscardy, Valérie Wilquet, Frank Daerden, José Juan Lopez-Moreno, Giancarlo Bellucci

    Planetary and Space Science　105504-105504　2022/05

    Publisher: Elsevier BV

    DOI： 10.1016/j.pss.2022.105504 　

    ISSN： 0032-0633

  55. Explaining NOMAD D/H Observations by Cloud‐induced Fractionation of Water Vapor on Mars Peer-reviewed

    F. Daerden, L. Neary, G. Villanueva, G. Liuzzi, S. Aoki, R. T. Clancy, J. A. Whiteway, B. J. Sandor, M. D. Smith, M. J. Wolff, A. Pankine, A. Khayat, R. Novak, B. Cantor, M. Crismani, M. J. Mumma, S. Viscardy, J. Erwin, C. Depiesse, A. Mahieux, A. Piccialli, S. Robert, L. Trompet, Y. Willame, E. Neefs, I. Thomas, B. Ristic, A. C. Vandaele

    Journal of Geophysical Research: Planets　2022/01/25

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2021je007079 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  56. Vertical distribution of dust in the Martian atmosphere: OMEGA/MEx limb observations Peer-reviewed

    Emiliano D'Aversa, Fabrizio Oliva, Francesca Altieri, Giuseppe Sindoni, Filippo Giacomo Carrozzo, Giancarlo Bellucci, François Forget, Anna Geminale, Arnaud Mahieux, Shohei Aoki, Marilena Amoroso

    Icarus　371　114702-114702　2022/01

    Publisher: Elsevier BV

    DOI： 10.1016/j.icarus.2021.114702 　

    ISSN： 0019-1035

  57. The Mars system revealed by the Martian Moons eXploration mission Peer-reviewed

    Kazunori Ogohara, Hiromu Nakagawa, Shohei Aoki, Toru Kouyama, Tomohiro Usui, Naoki Terada, Takeshi Imamura, Franck Montmessin, David Brain, Alain Doressoundiram, Thomas Gautier, Takuya Hara, Yuki Harada, Hitoshi Ikeda, Mizuho Koike, François Leblanc, Ramses Ramirez, Eric Sawyer, Kanako Seki, Aymeric Spiga, Ann Carine Vandaele, Shoichiro Yokota, Antonella Barucci, Shingo Kameda

    Earth, Planets and Space　74　(1)　2022/01

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1186/s40623-021-01417-0 　

    eISSN： 1880-5981

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    <title>Abstract</title>Japan Aerospace Exploration Agency (JAXA) plans a Phobos sample return mission (MMX: Martian Moons eXploration). In this study, we review the related works on the past climate of Mars, its evolution, and the present climate and weather to describe the scientific goals and strategies of the MMX mission regarding the evolution of the Martian surface environment. The MMX spacecraft will retrieve and return a sample of Phobos regolith back to Earth in 2029. Mars ejecta are expected to be accumulated on the surface of Phobos without being much shocked. Samples from Phobos probably contain all types of Martian rock from sedimentary to igneous covering all geological eras if ejecta from Mars could be accumulated on the Phobos surface. Therefore, the history of the surface environment of Mars can be restored by analyzing the returned samples. Remote sensing of the Martian atmosphere and monitoring ions escaping to space while the spacecraft is orbiting Mars in the equatorial orbit are also planned. The camera with multi-wavelength filters and the infrared spectrometer onboard the spacecraft can monitor rapid transport processes of water vapor, dust, ice clouds, and other species, which could not be traced by the previous satellites on the sun-synchronous polar orbit. Such time-resolved pictures of the atmospheric phenomena should be an important clue to understand both the processes of water exchange between the surface/underground reservoirs and the atmosphere and the drivers of efficient material transport to the upper atmosphere. The mass spectrometer with unprecedented mass resolution can observe ions escaping to space and monitor the atmospheric escape which has made the past Mars to evolve towards the cold and dry surface environment we know today. Together with the above two instruments, it can potentially reveal what kinds of atmospheric events can transport tracers (e.g., H2O) upward and enhance the atmospheric escape. <bold>Graphical Abstract</bold>

  58. Calibration of NOMAD on ESA's ExoMars Trace Gas Orbiter: Part 2 – The Limb, Nadir and Occultation (LNO) channel Peer-reviewed

    Ian R. Thomas, Shohei Aoki, Loïc Trompet, Séverine Robert, Cédric Depiesse, Yannick Willame, Guillaume Cruz-Mermy, Frédéric Schmidt, Justin T. Erwin, Ann Carine Vandaele, Frank Daerden, Arnaud Mahieux, Eddy Neefs, Bojan Ristic, Laszlo Hetey, Sophie Berkenbosch, Roland Clairquin, Bram Beeckman, Manish R. Patel, Jose Juan Lopez-Moreno, Giancarlo Bellucci

    Planetary and Space Science　105410-105410　2021/12

    Publisher: Elsevier BV

    DOI： 10.1016/j.pss.2021.105410 　

    ISSN： 0032-0633

  59. Calibration of NOMAD on ESA's ExoMars Trace Gas Orbiter: Part 1 – The Solar Occultation channel Peer-reviewed

    Ian R. Thomas, Shohei Aoki, Loïc Trompet, Séverine Robert, Cédric Depiesse, Yannick Willame, Justin T. Erwin, Ann Carine Vandaele, Frank Daerden, Arnaud Mahieux, Eddy Neefs, Bojan Ristic, Laszlo Hetey, Sophie Berkenbosch, Roland Clairquin, Bram Beeckman, Manish R. Patel, Jose Juan Lopez-Moreno, Giancarlo Bellucci

    Planetary and Space Science　105411-105411　2021/12

    Publisher: Elsevier BV

    DOI： 10.1016/j.pss.2021.105411 　

    ISSN： 0032-0633

  60. Water vapor saturation and ice cloud occurrence in the atmosphere of Mars Peer-reviewed

    Loïc Poncin, Armin Kleinböhl, David M. Kass, R. Todd Clancy, Shohei Aoki, Ann Carine Vandaele

    Planetary and Space Science　105390-105390　2021/12

    Publisher: Elsevier BV

    DOI： 10.1016/j.pss.2021.105390 　

    ISSN： 0032-0633

  61. MIRS: an imaging spectrometer for the MMX mission Peer-reviewed

    Maria Antonietta Barucci, Jean-Michel Reess, Pernelle Bernardi, Alain Doressoundiram, Sonia Fornasier, Michel Le Du, Takahiro Iwata, Hiromu Nakagawa, Tomoki Nakamura, Yves André, Shohei Aoki, Takehiko Arai, Elisa Baldit, Pierre Beck, Jean-Tristan Buey, Elisabet Canalias, Matthieu Castelnau, Sebastien Charnoz, Marc Chaussidon, Fréderic Chapron, Valerie Ciarletti, Marco Delbo, Bruno Dubois, Stephane Gauffre, Thomas Gautier, Hidenori Genda, Rafik Hassen-Khodja, Gilles Hervet, Ryuki Hyodo, Christian Imbert, Takeshi Imamura, Laurent Jorda, Shingo Kameda, Driss Kouach, Toru Kouyama, Takeshi Kuroda, Hiroyuki Kurokawa, Laurent Lapaw, Jeremie Lasue, Laetitia Le Deit, Aurélien Ledot, Cedric Leyrat, Bertrand Le Ruyet, Moe Matsuoka, Frederic Merlin, Hideaki Miyamoto, Frederic Moynier, Napoleon Nguyen Tuong, Kazunori Ogohara, Takahito Osawa, Jérôme Parisot, Laurie Pistre, Benjamin Quertier, Sean N. Raymond, Francis Rocard, Takeshi Sakanoi, Takao M. Sato, Eric Sawyer, Fériel Tache, Sylvain Trémolières, Fuminori Tsuchiya, Pierre Vernazza, Didier Zeganadin

    Earth, Planets and Space　73　(1)　2021/12

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1186/s40623-021-01423-2 　

    ISSN： 1343-8832

    eISSN： 1880-5981

  62. First Detection and Thermal Characterization of Terminator CO2 Ice Clouds with ExoMars/NOMAD Peer-reviewed

    Giuliano Liuzzi, Geronimo L. Villanueva, Loïc Trompet, Matteo M. J. Crismani, Arianna Piccialli, Shohei Aoki, Miguel Angel Lopez‐Valverde, Aurélien Stolzenbach, Frank Daerden, Lori Neary, Michael D. Smith, Manish R. Patel, Stephen R. Lewis, R. Todd Clancy, Ian R. Thomas, Bojan Ristic, Giancarlo Bellucci, Jose‐Juan Lopez‐Moreno, Ann Carine Vandaele

    Geophysical Research Letters　2021/11/05

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2021gl095895 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  63. ExoMars TGO/NOMAD‐UVIS vertical profiles of ozone: Part 1 – Seasonal variation and comparison to water Peer-reviewed

    M.R. Patel, G. Sellers, J.P. Mason, J.A. Holmes, M.A.J. Brown, S.R. Lewis, K. Rajendran, P.M. Streeter, C. Marriner, B.G. Hathi, D.J. Slade, M.R. Leese, M.J. Wolff, A.S.J. Khayat, M.D. Smith, S. Aoki, A. Piccialli, A.C. Vandaele, S. Robert, F. Daerden, I. R. Thomas, B. Ristic, Y. Willame, C. Depiesse, G. Bellucci, J.‐J. Lopez‐Moreno

    Journal of Geophysical Research: Planets　2021/11/02

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2021je006837 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  64. A Global and Seasonal Perspective of Martian Water Vapor from ExoMars/NOMAD Peer-reviewed

    M. M. J. Crismani, G. L. Villanueva, G. Liuzzi, M. D. Smith, E. W. Knutsen, F. Daerden, L. Neary, M. J. Mumma, S. Aoki, L. Trompet, I.R. Thomas, B. Ristic, G. Bellucci, A. Piccialli, S. Robert, A. Mahieux, J‐J Lopez Moreno, G. Sindoni, M. Giuranna, M. R. Patel, A. C. Vandaele

    Journal of Geophysical Research: Planets　2021/10/17

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2021je006878 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  65. Can we constrain the origin of Mars' recurring slope lineae using atmospheric observations? Peer-reviewed

    Hiroyuki Kurokawa, Takeshi Kuroda, Shohei Aoki, Hiromu Nakagawa

    Icarus　371　114688-114688　2021/09

    Publisher: Elsevier BV

    DOI： 10.1016/j.icarus.2021.114688 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  66. Enhanced water loss from the martian atmosphere during a regional-scale dust storm and implications for long-term water loss Peer-reviewed

    J.A. Holmes, S.R. Lewis, M.R. Patel, M.S. Chaffin, E.M. Cangi, J. Deighan, N.M. Schneider, S. Aoki, A.A. Fedorova, D.M. Kass, A.C. Vandaele

    Earth and Planetary Science Letters　571　2021/07

  67. Intense Zonal Wind in the Martian Mesosphere During the 2018 Planet‐Encircling Dust Event Observed by Ground‐Based Infrared Heterodyne Spectroscopy Peer-reviewed

    Akiho Miyamoto, Hiromu Nakagawa, Takeshi Kuroda, Kosuke Takami, Isao Murata, Alexander S. Medvedev, Nao Yoshida, Shohei Aoki, Hideo Sagawa, Yasumasa Kasaba, Naoki Terada

    Geophysical Research Letters　48　(11)　2021/06/16

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2021gl092413 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  68. Probing the Atmospheric Cl Isotopic Ratio on Mars: Implications for Planetary Evolution and Atmospheric Chemistry Peer-reviewed

    Giuliano Liuzzi, Geronimo L. Villanueva, Sebastien Viscardy, Daniel Mège, Matteo M. J. Crismani, Shohei Aoki, Joanna Gurgurewicz, Pierre‐Antoine Tesson, Michael J. Mumma, Michael D. Smith, Sara Faggi, Vincent Kofman, Elise W. Knutsen, Frank Daerden, Lori Neary, Frédéric Schmidt, Loïc Trompet, Justin T. Erwin, Séverine Robert, Ian R. Thomas, Bojan Ristic, Giancarlo Bellucci, Jóse Juan Lopez‐Moreno, Manish R. Patel, Ann Carine Vandaele

    Geophysical Research Letters　48　(9)　2021/05/16

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2021gl092650 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  69. Comprehensive investigation of Mars methane and organics with ExoMars/NOMAD Peer-reviewed

    Elise W. Knutsen, Geronimo L. Villanueva, Giuliano Liuzzi, Matteo M.J. Crismani, Michael J. Mumma, Michael D. Smith, Ann Carine Vandaele, Shohei Aoki, Ian R. Thomas, Frank Daerden, Sébastien Viscardy, Justin T. Erwin, Loic Trompet, Lori Neary, Bojan Ristic, Miguel Angel Lopez-Valverde, Jose Juan Lopez-Moreno, Manish R. Patel, Ozgur Karatekin, Giancarlo Bellucci

    Icarus　357　2021/03/15

    DOI： 10.1016/j.icarus.2020.114266 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  70. The current weather and climate of Mars: 12 years of atmospheric monitoring by the Planetary Fourier Spectrometer on Mars Express Peer-reviewed

    Marco Giuranna, Paulina Wolkenberg, Davide Grassi, Alessandro Aronica, Shohei Aoki, Diego Scaccabarozzi, Bortolino Saggin, V. Formisano

    Icarus　353　2021/01/01

    DOI： 10.1016/j.icarus.2019.113406 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  71. Impact of gradients at the Martian terminator on the retrieval of ozone from SPICAM/MEx Peer-reviewed

    Piccialli, A., Vandaele, A.C., Trompet, L., Neary, L., Viscardy, S., Erwin, J.T., Määttänen, A., Daerden, F., Willame, Y., Robert, S., Aoki, S., Wilquet, V., Lefèvre, F., Montmessin, F.

    Icarus　353　2020

    DOI： 10.1016/j.icarus.2019.113598 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  72. Strong Variability of Martian Water Ice Clouds During Dust Storms Revealed From ExoMars Trace Gas Orbiter/NOMAD Peer-reviewed

    Liuzzi, G., Villanueva, G.L., Crismani, M.M.J., Smith, M.D., Mumma, M.J., Daerden, F., Aoki, S., Vandaele, A.C., Clancy, R.T., Erwin, J., Thomas, I., Ristic, B., Lopez-Moreno, J.-J., Bellucci, G., Patel, M.R.

    Journal of Geophysical Research: Planets　125　(4)　2020

    DOI： 10.1029/2019JE006250 　

    ISSN： 2169-9097

    eISSN： 2169-9100

  73. Evaluation of a method to retrieve temperature and wind velocity profiles of the Venusian nightside mesosphere from mid-infrared CO<inf>2</inf> absorption line observed by heterodyne spectroscopy Peer-reviewed

    Takami, K., Nakagawa, H., Sagawa, H., Krause, P., Murata, I., Kasaba, Y., Kuroda, T., Aoki, S., Kouyama, T., Kostiuk, T., Livengood, T.A., Gilli, G.

    Earth, Planets and Space　72　(1)　2020

    DOI： 10.1186/s40623-020-01188-0 　

    ISSN： 1343-8832

    eISSN： 1880-5981

  74. 全球ダストストーム中の火星地表面放射の観測 Peer-reviewed

    佐川 英夫, 青木 翔平, 前澤 裕之, 中川 広務, 笠羽 康正

    日本惑星科学会誌遊星人　28　(4)　277-284　2019/12

  75. Retrieval and characterization of carbon monoxide (CO) vertical profiles in the Martian atmosphere from observations of PFS/MEX Peer-reviewed

    Jimmy Bouche, Sophie Bauduin, Marco Giuranna, Séverine Robert, Shohei Aoki, Ann Carine Vandaele, Justin T. Erwin, Frank Daerden, Paulina Wolkenberg, Pierre François Coheur

    Journal of Quantitative Spectroscopy and Radiative Transfer　238　2019/11

    DOI： 10.1016/j.jqsrt.2019.05.009 　

    ISSN： 0022-4073

  76. Ground-based infrared mapping of H<inf>2</inf>O<inf>2</inf>on Mars near opposition Peer-reviewed

    T. Encrenaz, T. K. Greathouse, S. Aoki, F. Daerden, M. Giuranna, F. Forget, F. Lefe&gravelvre, F. Montmessin, T. Fouchet, B. Bézard, S. K. Atreya, C. DeWitt, M. J. Richter, L. Neary, S. Viscardy

    Astronomy and Astrophysics　627　2019/07/01

    DOI： 10.1051/0004-6361/201935300 　

    ISSN： 0004-6361

    eISSN： 1432-0746

  77. Methane on Mars: New insights into the sensitivity of CH <inf>4</inf> with the NOMAD/ExoMars spectrometer through its first in-flight calibration Peer-reviewed

    Liuzzi, G., Villanueva, G.L., Mumma, M.J., Smith, M.D., Daerden, F., Ristic, B., Thomas, I., Vandaele, A.C., Patel, M.R., Lopez-Moreno, J.-J., Bellucci, G., Allen, M., Alonso-Rodrigo, G., Altieri, F., Aoki, S., Bauduin, S., Bolsée, D., Clancy, T., Cloutis, E., D'Aversa, E., Depiesse, C., Erwin, J., Fedorova, A., Formisano, V., Funke, B., Fussen, D., Garcia-Comas, M., Geminale, A., Gérard, J.-C., Gillotay, D., Giuranna, M., Gonzalez-Galindo, F., Hewson, W., Homes, J., Ignatiev, N., Kaminski, J., Karatekin, O., Kasaba, Y., Lanciano, O., Lefèvre, F., Lewis, S., López- Puertas, M., López-Valverde, M., Mahieux, A., Mason, J., Mc Connell, J., Hiromu Neary Nakagawa, L., Neefs, E., Novak, R., Oliva, F., Piccialli, A., Renotte, E., Robert, S., Sindoni, G., Stiepen, A., Trokhimovskiy, A., Vander Auwera, J., Viscardy, S., Whiteway, J., Willame, Y., Wilquet, V., Wolff, M., Wolkenberg, P., Alonso-Rodrigo, G., Aparicio del Moral, B., Barzin, P., Beeckman, B., BenMoussa, A., Berkenbosch, S., Biondi, D., Bonnewijn, S., Candini, G.P., Clairquin, R., Cubas, J., Giordanengo, B., Gissot, S., Gomez, A., Hathi, B., Jeronimo Zafra, J., Leese, M., Maes, J., Mazy, E., Mazzoli, A., Meseguer, J., Morales, R., Orban, A., Pastor-Morales, M., Perez-grande, I., Queirolo, C., Rodriguez Gomez, J., Saggin, B., Samain, V., Sanz Andres, A., Sanz, R., Simar, J.-F., Thibert, Tanguy.

    Icarus　321　671-690　2019

    DOI： 10.1016/j.icarus.2018.09.021 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  78. Detection of Crystalline and Fine-grained Calcic Plagioclases on Vesta Peer-reviewed

    Palomba, E., D'Aversa, E., Sato, T.M., Longobardo, A., Dirri, F., Aoki, S., Orton, G., Sindoni, G., Oliva, F., Carrozzo, G., Kasaba, Y.

    Astrophysical Journal Letters　882　(2)　L22-L22　2019

    Publisher: American Astronomical Society

    DOI： 10.3847/2041-8213/ab339e 　

    ISSN： 2041-8205

    eISSN： 2041-8213

  79. ExoMars TGOと火星衛星探査計画MMXによる火星大気観測 Peer-reviewed

    青木 翔平, 中川 広務, 小郷原 一智, 神山 徹, 今村 剛, 笠羽 康正

    日本惑星科学会誌遊星人　27　(3)　224-228　2018/09

  80. NOMAD, an Integrated Suite of Three Spectrometers for the ExoMars Trace Gas Mission: Technical Description, Science Objectives and Expected Performance Peer-reviewed

    Ann Carine Vandaele, J. J. Lopez-Moreno, M. R. Patel, Giancarlo Bellucci, Frank Daerden, Bojan Ristic, Séverine Robert, Ian R. Thomas, Valerie Wilquet, Mark Allen, Gustavo Alonso-Rodrigo, Francesca Altieri, Shohei Aoki, David Bolsée, Todd Clancy, Edward Cloutis, Cédric Depiesse, Rachel Drummond, Anna Fedorova, Vittorio Formisano, Bernd Funke, F. González-Galindo, Anna Geminale, Jean Claude Gérard, Marco Giuranna, Laszlo Hetey, Nicolai Ignatiev, Jacek Kaminski, Ozgur Karatekin, Yasumasa Kasaba, Mark Leese, Franck Lefèvre, Stephen R. Lewis, Manuel López-Puertas, Miguel López-Valverde, Arnaud Mahieux, Jon Mason, J. McConnell, Mike Mumma, Lori Neary, Eddy Neefs, Etienne Renotte, Julio Rodriguez-Gomez, Giuseppe Sindoni, Mike Smith, Arnaud Stiepen, Alexander Trokhimovsky, Jean Vander Auwera, Geronimo Villanueva, Sébastien Viscardy, Jim Whiteway, Yannick Willame, Mike Wolff, Manish Patel, Emiliano D’aversa, Didier Fussen, Maya Garcia-Comas, Francisco Gonzalez-Galindo, Will Hewson, Jack McConnel, Robert Novak, Fabrizio Oliva, Arianna Piccialli, Beatriz Aparicio Del Moral, Pascal Barzin, Ali Benmoussa, Sophie Berkenbosch, David Biondi, Sabrina Bonnewijn, Gian Paolo Candini, Roland Clairquin, Javier Cubas, Sofie De-Lanoye, Boris Giordanengo, Samuel Gissot, Alejandro Gomez, Jeroen Maes, Emmanuel Mazy, Alexandra Mazzoli, Jose Meseguer, Rafael Morales, Anne Orban, Maria Del Carmen Pastor-Morales, Isabel Perez-Grande, Claudio Queirolo, Bortolino Saggin, Valérie Samain, Angel Sanz Andres, Rosario Sanz, Juan Felipe Simar, Tanguy Thibert, Jose Jeronimo Zafra

    Space Science Reviews　214　(5)　2018/08/01

    DOI： 10.1007/s11214-018-0517-2 　

    ISSN： 0038-6308

    eISSN： 1572-9672

  81. Characterization of dust activity on Mars from MY27 to MY32 by PFS-MEX observations Peer-reviewed

    Paulina Wolkenberg, Marco Giuranna, Davide Grassi, Alessandro Aronica, Shohei Aoki, Diego Scaccabarozzi, Bortolino Saggin

    Icarus　310　32-47　2018/08

    DOI： 10.1016/j.icarus.2017.10.045 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  82. New measurements of D/H on Mars using EXES aboard SOFIA Peer-reviewed

    T. Encrenaz, C. DeWitt, M. J. Richter, T. K. Greathouse, T. Fouchet, F. Montmessin, F. Lefèvre, B. Bézard, S. K. Atreya, S. Aoki, H. Sagawa

    Astronomy and Astrophysics　612　2018/04

    DOI： 10.1051/0004-6361/201732367 　

    ISSN： 0004-6361

    eISSN： 1432-0746

  83. IR heterodyne spectrometer MILAHI for continuous monitoring observatory of Martian and Venusian atmospheres at Mt. Haleakalā, Hawaii Peer-reviewed

    Hiromu Nakagawa, Shohei Aoki, Hideo Sagawa, Yasumasa Kasaba, Isao Murata, Guido Sonnabend, Manuela Sornig, Shoichi Okano, Jeffrey R. Kuhn, Joseph M. Ritter, Masato Kagitani, Takeshi Sakanoi, Makoto Taguchi, Kosuke Takami

    Planetary and Space Science　126　34-48　2016/07/01

    DOI： 10.1016/j.pss.2016.04.002 　

    ISSN： 0032-0633

  84. Expected performances of the NOMAD/ExoMars instrument Peer-reviewed

    S. Robert, A. C. Vandaele, I. Thomas, Y. Willame, F. Daerden, S. Delanoye, C. Depiesse, R. Drummond, E. Neefs, L. Neary, B. Ristic, J. Mason, J. J. Lopez-Moreno, J. Rodriguez-Gomez, M. R. Patel, G. Bellucci, M. Patel, M. Allen, F. Altieri, S. Aoki, D. Bolsée, T. Clancy, E. Cloutis, A. Fedorova, V. Formisano, B. Funke, D. Fussen, M. Garcia-Comas, A. Geminale, J. C. Gérard, D. Gillotay, M. Giuranna, F. Gonzalez-Galindo, N. Igna-Tiev, J. Kaminski, O. Karatekin, Y. Kasaba, F. Lefèvre, S. Lewis, M. López-Puertas, M. López-Valverde, A. Mahieux, J. McConnell, M. Mumma, R. Novak, E. Renotte, G. Sindoni, M. Smith, A. Trokhimovskiy, Auwera J. Vander, G. Villanueva, S. Viscardy, J. Whiteway, V. Wilquet, M. Wolff, G. Alonso-Rodrigo, B. Aparicio Del Moral, P. Barzin, A. Benmoussa, S. Berkenbosch, D. Biondi, S. Bonnewijn, G. Candini, R. Clairquin, J. Cubas, B. Giordanengo, S. Gissot, A. Gomez, J. J. Zafra, M. Leese, J. Maes, E. Mazy, A. Mazzoli, J. Meseguer, R. Morales, A. Orban, M. Pastor-Morales, I. Perez-Grande, B. Saggin, V. Samain, Andres A. Sanz, R. Sanz, J. F. Simar, T. Thibert

    Planetary and Space Science　124　94-104　2016/05/01

    DOI： 10.1016/j.pss.2016.03.003 　

    ISSN： 0032-0633

  85. Optical and radiometric models of the NOMAD instrument Part II: The infrared channels - SO and LNO Peer-reviewed

    I. R. Thomas, A. C. Vandaele, S. Robert, E. Neefs, R. Drummond, F. Daerden, S. Delanoye, B. Ristic, S. Berkenbosch, R. Clairquin, J. Maes, S. Bonnewijn, C. Depiesse, A. Mahieux, L. Trompet, L. Neary, Y. Willame, V. Wilquet, D. Nevejans, L. Aballea, W. Moelans, L. De Vos, S. Lesschaeve, N. Van Vooren, J. J. Lopez-Moreno, M. R. Patel, G. Bellucci, Mark Allen, Francesca Altieri, Shohei Aoki, David Bolsée, Todd Clancy, Edward Cloutis, Anna Fedorova, Vittorio Formisano, Bernd Funke, Didier Fussen, Maya Garcia-Comas, Anna Geminale, Jean Claude Gérard, Didier Gillotay, Marco Giuranna, Francisco Gonzalez-Galindo, Nicolai Ignatiev, Jacek Kaminski, Ozgur Karatekin, Yasumasa Kasaba, Franck Lefèvre, Stephen Lewis, Manuel López-Puertas, Miguel López-Valverde, Jon Mason, Jack McConnell, Mike Mumma, Robert Novak, Etienne Renotte, Giuseppe Sindoni, Mike Smith, Sacha Trokhimovsky, Jean Vander Auwera, Geronimo Villanueva, Jim Whiteway, Mike Wolff, Gustavo Alonso-Rodrigo, Beatriz Aparicio Del Moral, Pascal Barzin, Ali BenMoussa, David Biondi, Gian Paolo Candini, Javier Cubas, Boris Giordanengo, Samuel Gissot, Alejandro Gomez, Jose Jeronimo Zafra, Mark Leese, Emmanuel Mazy, Alexandra Mazzoli, Jose Meseguer, Rafael Morales, Anne Orban, Maria Del Carmen Pastor-Morales, Isabel Perez-Grande, Julio Rodriguez-Gomez, Bortolino Saggin, Valérie Samain, Angel Sanz Andres, Rosario Sanz, Juan Felipe Simar, Tanguy Thibert

    Optics Express　24　(4)　3790-3805　2016/02/22

    DOI： 10.1364/OE.24.003790 　

    eISSN： 1094-4087

  86. Science objectives and performances of NOMAD, a spectrometer suite for the ExoMars TGO mission Peer-reviewed

    A. C. Vandaele, E. Neefs, R. Drummond, I. R. Thomas, F. Daerden, J. J. Lopez-Moreno, J. Rodriguez, M. R. Patel, G. Bellucci, M. Allen, F. Altieri, D. Bolsée, T. Clancy, S. Delanoye, C. Depiesse, E. Cloutis, A. Fedorova, V. Formisano, B. Funke, D. Fussen, A. Geminale, J. C. Gérard, M. Giuranna, N. Ignatiev, J. Kaminski, O. Karatekin, F. Lefèvre, M. López-Puertas, M. López-Valverde, A. Mahieux, J. McConnell, M. Mumma, L. Neary, E. Renotte, B. Ristic, S. Robert, M. Smith, S. Trokhimovsky, J. Vanderauwera, G. Villanueva, J. Whiteway, V. Wilquet, M. Wolff, Shohei Aoki, Maya Garcia-Comas, Didier Gillotay, Francisco Gonzalez-Galindo, Yasumasa Kasabe, Stephen Lewis, Jon Mason, Giuseppe Sindoni, Yannick Willame, Gustavo Alonso-Rodrigo, Beatriz Aparicio Del Moral, Pascal Barzin, Ali Ben Moussa, Sophie Berkenbosch, David Biondi, Sabrina Bonnewijn, Gian Paolo Candini, Roland Clairquin, Javier Cubas, Boris Giordanengo, Samuel Gissot, Alejandro Gomez, Jose Jeronimo Zafra, Mark Leese, Jeroen Maes, Emmanuel Mazy, Alexandra Mazzoli, Jose Meseguer, Rafael Morales, Anne Orban, Maria Del Carmen Pastor-Morales, Isabel Perez-Grande, Julio Rodriguez-Gomez, Bortolino Saggin, Valérie Samain, Angel Sanz Andres, Rosario Sanz, Juan Felipe Simar, Tanguy Thibert

    Planetary and Space Science　119　233-249　2015/12/15

    DOI： 10.1016/j.pss.2015.10.003 　

    ISSN： 0032-0633

  87. Optical and radiometric models of the NOMAD instrument Part I: The UVIS channel Peer-reviewed

    Ann C. Vandaele, Yannick Willame, Cédric Depiesse, Ian R. Thomas, Séverine Robert, David Bolsée, Manish R. Patel, Jon P. Mason, Mark Leese, Stefan Lesschaeve, Philippe Antoine, Frank Daerden, Sofie Delanoye, Rachel Drummond, Eddy Neefs, Bojan Ristic, José Juan Lopez-Moreno, Giancarlo Bellucci, M. Allen, F. Altieri, S. Aoki, T. Clancy, E. Cloutis, A. Fedorova, V. Formisano, B. Funke, D. Fussen, M. Garcia-Comas, A. Geminale, J. C. Gérard, D. Gillotay, M. Giuranna, F. Gonzalez-Galindo, N. Ignatiev, J. Kaminski, O. Karatekin, Y. Kasaba, F. Lefèvre, S. Lewis, M. López-Puertas, M. López-Valverde, A. Mahieux, M. Mumma, L. Neary, R. Novak, E. Renotte, G. Sindoni, M. Smith, A. Trokhimovskiy, J. Vander Auwera, G. Villanueva, S. Viscardy, J. Whiteway, V. Wilquet, M. Wolff, G. Alonso-Rodrigo, B. Aparicio Del Moral, P. Barzin, A. BenMoussa, S. Berkenbosch, D. Biondi, S. Bonnewijn, G. Candini, R. Clairquin, J. Cubas, B. Giordanengo, S. Gissot, A. Gomez, J. J. Zafra, J. Maes, E. Mazy, A. Mazzoli, J. Meseguer, R. Morales, A. Orban, M. Pastor-Morales, I. Perez-Grande, J. Rodriguez-Gomez, B. Saggin, V. Samain, A. Sanz Andres, R. Sanz, J. F. Simar, T. Thibert

    Optics Express　23　(23)　30028-30042　2015/11/16

    DOI： 10.1364/OE.23.030028 　

    eISSN： 1094-4087

  88. Comparison of general circulation model atmospheric wave simulations with wind observations of venusian mesosphere Peer-reviewed

    Hiromu Nakagawa, Naoya Hoshino, Manuela Sornig, Yasumasa Kasaba, Guido Sonnabend, Dusan Stupar, Shohei Aoki, Isao Murata

    Icarus　225　(1)　840-849　2013/07

    DOI： 10.1016/j.icarus.2013.02.029 　

    ISSN： 0019-1035

    eISSN： 1090-2643

  89. Search of SO<inf>2</inf> in the Martian atmosphere by ground-based submillimeter observation Peer-reviewed

    Hiromu Nakagawa, Yasumasa Kasaba, Hiroyuki Maezawa, Akira Hashimoto, Hideo Sagawa, Isao Murata, Shoichi Okano, Shohei Aoki, Nayuta Moribe, Akira Mizuno, Munetake Momose, Toshikazu Ohnishi, Norikazu Mizuno, Tomoo Nagahama

    Planetary and Space Science　57　(14-15)　2123-2127　2009/12

    DOI： 10.1016/j.pss.2009.10.001 　

    ISSN： 0032-0633

Show all ︎Show first 5

Misc. 4

  1. 火星の砂嵐研究成果が続々と

    青木翔平

    ISASニュース　2021年10月号　(No.487)　2021/10

  2. Remote sensing of surface pressure on Mars by CO2 2 μm absorption band observed by Mars Express/OMEGA

    風間暁, 笠羽康正, 中川広務, 青木翔平, 黒田剛史, 小暮李成, 鈴木湧平, 村田功, 吉田奈央

    地球電磁気・地球惑星圏学会総会及び講演会(Web)　150th　2021

  3. Validation of a new atmospheric retrieval technique for the vertical profiles of Martian atmosphere by limb observations

    小暮李成, 青木翔平, MAHIEUX Arnaud, 中川広務, 黒田剛史, 笠羽康正, 吉田奈央, 岩渕弘信, 出村裕英

    地球電磁気・地球惑星圏学会総会及び講演会(Web)　150th　2021

  4. 火星RSLからの水放出シミュレーション

    黒田剛史, 黒川宏之, 青木翔平, 中川広務

    日本気象学会大会講演予稿集(CD-ROM)　(120)　2021

Research Projects 11

  1. Water transport through clouds: development of non-equilibrium planetary cloud physics

    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: The University of Tokyo

    2024/06/28 - 2027/03/31

  2. New isotope obervations of Mars atmsopheric evolution: International collaboration of European and Japanese Mars exploration missions

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

    Institution: Tohoku University

    2022/10/07 - 2027/03/31

  3. Decoding CO world in early Earth and Mars

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Transformative Research Areas (A)

    Institution: Institute of Science Tokyo

    2022/06/16 - 2027/03/31

  4. Evolution of carbon and nitrogen and generation of prebiotic molecules in the Martian atmosphere

    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: Tohoku University

    2022/04/01 - 2027/03/31

  5. 探査機・望遠鏡観測による火星の鉛直水輸送過程解明

    青木 翔平

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(C)

    Institution: 東京大学

    2022/04/01 - 2026/03/31

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    本年度は特に「課題(C): MMX火星探査機による局所高速鉛直水輸送過程の解明」を行なった。MMXの打ち上げが2年延期され、本研究期間内に火星に到達しない見込みとなったため、既存の火星探査衛星の高空間分解能分光撮像観測データを用いることとした。具体的には、欧州火星探査機MarsExpressの分光撮像装置OMEGAを用いた。まず、高解像水蒸気観測データ解析アルゴリズムを完成させた。高解像度分光観測データ解析の困難な点は、データ点の多さから、放射伝達計算による反転解析に膨大な時間がかかることである。本研究で開発したアルゴリズムでは、計算に入力する変数を想定される範囲内の代表的な値で格子点に区切り、水蒸気吸収帯のスペクトルを予め計算し、保存した配列から多次元補間によって計算スペクトルを得ことで、効率的に反転解析を行うことを可能とした。さらに、同アルゴリズムを南半球の夏時期に観測されたOMEGAデータに適応し、高解像水蒸気分布が朝夕で変動する興味深い初期結果を得た。同内容を元に国内学会で講演するとともに、仏・OMEGAチームと議論を進め、来年度に国際専門雑誌へ論文として投稿する準備を進めている。 <BR> 加えて、欧州火星探査機ExoMars Trace Gas Orbiterの観測データをから、火星大気に存在する一酸化炭素が炭素13に乏しい事を明らかにした。本結果は、 The Planetary Science Journal誌において論文として出版され、東京大学新領域創成科学研究科、及び欧州宇宙機関ESAのプレスリリースで発表された。

  6. Variations and evolutions of Martian atmospheric environment investigated in the collaboration with European and US missions

    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: Tohoku University

    2019/04/01 - 2024/03/31

  7. Habitability on Mars: water and methane

    Shohei Aoki

    Offer Organization: Fonds de la recherche scientifique (FNRS-FRS)

    System: GRANTS AND FELLOWSHIPS 2019 (Chargé de Recherches)

    2019/10 - 2022/09

  8. Vertical transport from the lower atmosphere to space via atmospheric waves on Mars

    Nakagawa Hiromu

    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: Tohoku University

    2019/04/01 - 2022/03/31

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    We clarified the process of water and material transport to the upper atmosphere via atmospheric waves using a space-born and ground-based observations. (1) Our new-developed fast radiative calculation code is capable to retrieve the density and particle size of dust and ice clouds in the Martian atmosphere. (2) Using occultation observations in the Martian middle atmosphere, we clarified the vertical transport process of water vapor, the temperature structure in the night side, the upward propagation process of atmospheric gravity waves, and the acceleration of zonal winds during the dust storm. (3) Seasonal changes in the lower atmosphere and variations associated with dust storms can significantly alter the composition of the upper atmosphere, which can be escaped into space.

  9. Regional coupling between surface, atmosphere, and space for understanding water cycle on Mars

    Nakagawa Hiromu, KASABA YASUMASA, SAGAWA HIDEO, KURODA TAKESHI, AOKI SHOHEI

    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: Tohoku University

    2016/04/01 - 2019/03/31

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    TGO observations first reveal the vertical distribution of the HDO/H2O up to 80 km, which suggest an increase of the abundance of H2O and HDO during the dust storm. Simultaneously, our ground-based observations found a remarkable enhancement of the atmospheric temperature at 80 altitudes during the dust storm. This could cause stronger atmospheric circulation and preventing ice cloud formation, which may confine water vapor to lower altitudes. Our MAVEN result indicates the detection of an extensive layer of warm air at altitudes 70 to 90 km, which has a good agreement with above. The atmospheric composition and wave activity in the upper atmosphere dramatically changes in season. Our study proposes an effective and high-speed mass/energy transportation into the upper atmosphere. The resultant stronger atmospheric circulation could carry the dust and water vapor into the upper atmosphere, which drive direct escape of water to space in a time-scale of weeks or months.

  10. 日本-ベルギー協力による金星・火星大気の探査機観測-地上観測連携研究

    Offer Organization: JSPS 日本学術振興会(JSPS)

    System: 二国間交流事業

    2017/04 - 2019/03

  11. 高分散分光観測による微量組成成分を軸とした火星大気研究

    青木 翔平

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 東北大学

    2011 - 2013

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    火星における生命活動の制約につながる大気分子メタン循環及び水蒸気循環を解明することが本研究の主目的である。本研究では, (1)火星周回衛星搭載赤外フーリエ分光計(PFS)のデータ解析, (2)すばる望遠鏡を用いた地上望遠鏡観測, 及び(3)超高波長分解能中間赤外レーザーヘテロダイン分光計の開発・観測の3つの手法で研究を進めてきた。(1)においては、メタンの酸化消失を起こす大気酸化成分H202の検出・季節変動の導出に衛星観測データを用いて初めて成功した。得られた季節変動からメタンの大気での酸化消失への寄与は少ない事を示し、地表強い固体酸化があることを示唆した。同内容は国際専門雑誌に投稿され、現在改訂中である。また、将来のPFSリムモード観測データ解析に向けて必須となる大気放射伝達計算コードを開発・評価を行った。(2)においては、近赤外分光計を用いて、北半球春・夏の水蒸気同位体分布を調べた。同位体は水分子の凝結・昇華で変化することが知られているため、相変化の指標となる。北半球春の観測から、極冠の縁で昇華した水蒸気が凝結し氷雲や季節極冠を形成していく様子を捉えた。また、北半球夏の観測から、極冠全体が昇華していく様子を捉えた。さらに、低緯度領域では同位体比が極域ほど変動しないことを示した。同内容は国際学会で発表され、国際専門雑誌に投稿する準備が完了しつつある。(3)においては, 火星のメタンや水蒸気を十分に分解できる波長分解能10^7が達成され、測器の開発に成功した。東北大・ハワイ望遠鏡の建設遅延のため火星大気成分の連続観測モニターは来年度から実施される見込みである。

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Teaching Experience 1

  1. 情報基礎　Seikei University

Social Activities 1

  1. 地球環境の普遍性に火星の研究から迫る

    大学ジャーナル vol. 149

    2022/09/27 -

Media Coverage 7

  1. 火星大気中の塩化水素を全球で検出

    アストロアーツ　https://www.astroarts.co.jp/article/hl/a/13646_mars

    2024/07/24

    Type: Internet

  2. 東大、火星大気中に塩化水素が広域かつ非一様に存在していることを観測

    マイナビニュース　https://news.mynavi.jp/techplus/article/20240723-2991080/

    2024/07/23

    Type: Internet

  3. 東大、火星大気に存在する塩化水素の全球分布取得に成功

    日本経済新聞　https://www.nikkei.com/article/DGXZRSP675172_Z10C24A7000000/

    2024/07/19

    Type: Internet

  4. 火星の有機分子は一酸化炭素から光化学的に生成された、東工大が解明

    マイナビニュース　https://news.mynavi.jp/techplus/article/20240514-2945580/

    2024/05

    Type: Internet

  5. New discovery about the atmosphere of Mars

    Diario AS　https://en.as.com/latest_news/new-discovery-about-the-atmosphere-of-mars-n/

    2023/06/03

    Type: Internet

  6. 火星表面から水を宇宙に散逸させているのは砂嵐、JAXAが仕組みを確認

    マイナビ　マイナビニュース　https://news.mynavi.jp/article/20210819-1950466/

    2021/08/19

    Type: Internet

  7. 東大など、気象衛星ひまわり 8・9 号を活用して金星大気温度の長期変動の観測に成功

    日本経済新聞　https://www.nikkei.com/article/DGXZRSP693103_W5A620C2000000/

    2025/06/30

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