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Observational study of planetary atmosphere with ALMA

Research Project

Project/Area Number 20K04046
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 17010:Space and planetary sciences-related
Research InstitutionKyoto Sangyo University

Principal Investigator

Sagawa Hideo  京都産業大学, 理学部, 教授 (40526034)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords惑星上層大気 / 大気循環 / ドップラーシフト / アルマ望遠鏡 / リモートセンシング / 惑星大気 / 金星 / 火星 / ALMA望遠鏡 / ドップラー風速 / 干渉計 / 地上観測 / 火星大気 / 金星大気 / JCMT / 放射伝達
Outline of Research at the Start

惑星大気の循環に関して、上層大気においては適切なトレーサーが存在しない場合も多く、その観測例は極めて限られている。そうした中、惑星大気循環の新たな観測ツールとなり得るのが、ヘテロダイン測器の高波長分解能観測を用いた惑星スペクトルのドップラーシフト観測である。
本研究では、ALMA望遠鏡による金星・火星上層大気のサブミリ波放射観測を用い、両惑星上層大気の循環に関する新たな観測的知見を取得する。

Outline of Final Research Achievements

The objective of this study was to obtain observational constraints on atmospheric circulation in the upper atmospheres of Venus and Mars. Submillimeter-wave band absorption line spectra of carbon monoxide (CO) in the upper atmospheres of both planets were observed, and Doppler shifts in the spectra due to the line-of-sight velocity of atmospheric winds were derived.
The Doppler wind velocity profiles of the upper atmosphere of Venus obtained with (sub)millimeter-wave interferometer were compared with the numerical results of the atmospheric general circulation model GCM. The observed Doppler-wind maps were more consistent with a model that allows the presence of gravity waves with larger spatial scales than suggested in previous studies.
For Mars, valuable observational information on winds during a global dust storm was obtained with ALMA.

Academic Significance and Societal Importance of the Research Achievements

これまで観測的知見が乏しかった金星・火星の上層大気力学に関して、新たな知見が得られた。また、アルマ望遠鏡の惑星観測データの解析ノウハウを定量的に評価したことで、今後の類似研究の参考となる知見が得られた。惑星をアルマ望遠鏡で観測した際、空間周波数の短い成分がフィルタリングされることは元々知られていたが、それが、惑星上で様々な空間スケールで分布している大気微量成分を観測した際にどのような影響を及ぼすのかを議論した。さらに、本研究期間の最中に判明した、アルマ望遠鏡の較正処理における問題点に関しても、輝度の不確かさだけではなくスペクトルの形状をも変化させるということを本研究で明らかにした。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (38 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (20 results) Journal Article (13 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 12 results,  Open Access: 12 results) Presentation (5 results) (of which Int'l Joint Research: 5 results)

  • [Int'l Joint Research] NASA Goddard Space Flight Center (GSFC)(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] 欧州南天天文台(ESO)(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] 王立宇宙航空研究所(BIRA)(ベルギー)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] 国立天体物理学研究所(INAF)(イタリア)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] 国立天体物理学研究所(INAF)(イタリア)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] 王立宇宙航空研究所(BIRA)(ベルギー)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] NASA Goddard Space Flight Center (GSFC)(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] 欧州南天天文台(ESO)(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Belgian Institute for Space Aeronomy(ベルギー)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] MPS(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Space Science Institute/Massachusetts Institute of Technology(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] National Institute of Astrophysics(イタリア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Observatoire de Paris(フランス)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research]

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Belgian Institute for Space Aeronomy(ベルギー)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Cardiff University(英国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Space Science Institute/Massachusetts Institute of Technology(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] National Institute of Astrophysics(イタリア)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Observatoire de Paris(フランス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research]

    • Related Report
      2020 Research-status Report
  • [Journal Article] Heterogeneous Processes in the Atmosphere of Mars and Impact on H2O2 and O3 Abundances2023

    • Author(s)
      Daerden Frank、Crowley John N.、Neary Lori、Smith Michael D.、Loeffler Mark J.、Clancy R. Todd、Wolff Michael J.、Aoki Shohei、Sagawa Hideo
    • Journal Title

      Journal of Geophysical Research: Planets

      Volume: 128 Issue: 12 Pages: 1-34

    • DOI

      10.1029/2023je008014

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A new constraint on HCl abundance at the cloud top of Venus2023

    • Author(s)
      Sato Takao M.、Sagawa Hideo
    • Journal Title

      Icarus

      Volume: 390 Pages: 115307-115307

    • DOI

      10.1016/j.icarus.2022.115307

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Density and Temperature of the Upper Mesosphere and Lower Thermosphere of Mars Retrieved From the OI 557.7?nm Dayglow Measured by TGO/NOMAD2022

    • Author(s)
      Aoki S.、Gkouvelis L.、Gerard J.‐C.、Soret L.、Hubert B.、Lopez‐Valverde M. A.、Gonzalez‐Galindo F.、Sagawa H.、Thomas I. R.、Ristic B.、Willame Y.、Depiesse C.、Mason J.、Patel M. R.、Bellucci G.、Lopez‐Moreno J.‐J.、Daerden F.、Vandaele A. C.
    • Journal Title

      Journal of Geophysical Research: Planets

      Volume: 127 Issue: 6

    • DOI

      10.1029/2022je007206

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Ground-based HCN submillimetre measurements in Titan's atmosphere: an intercomparison with Herschel observations2022

    • Author(s)
      Rengel M.、Shulyak D.、Hartogh P.、Sagawa H.、Moreno R.、Jarchow C.、Breitschwerdt D.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 658 Pages: A88-A88

    • DOI

      10.1051/0004-6361/202141422

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Intense Zonal Wind in the Martian Mesosphere During the 2018 Planet‐Encircling Dust Event Observed by Ground‐Based Infrared Heterodyne Spectroscopy2021

    • Author(s)
      Miyamoto Akiho、Nakagawa Hiromu、Kuroda Takeshi、Takami Kosuke、Murata Isao、Medvedev Alexander S.、Yoshida Nao、Aoki Shohei、Sagawa Hideo、Kasaba Yasumasa、Terada Naoki
    • Journal Title

      Geophysical Research Letters

      Volume: 48 Issue: 11

    • DOI

      10.1029/2021gl092413

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 13C Isotopic Ratios of HC3N on Titan Measured with ALMA2021

    • Author(s)
      Iino Takahiro、Taniguchi Kotomi、Sagawa Hideo、Tsukagoshi Takashi
    • Journal Title

      The Planetary Science Journal

      Volume: 2 Issue: 4 Pages: 166-166

    • DOI

      10.3847/psj/ac134c

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Quasi-Periodic Variation of the Lower Equatorial Cloud Induced by Atmospheric Waves on Venus2021

    • Author(s)
      Ando Hiroki、Takagi Masahiro、Sagawa Hideo、Sugimoto Norihiko、Sekiguchi Miho、Matsuda Yoshihisa
    • Journal Title

      Journal of Geophysical Research: Planets

      Volume: 126 Issue: 6 Pages: 1-10

    • DOI

      10.1029/2020je006781

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] HDO and SO2 thermal mapping on Venus2020

    • Author(s)
      Encrenaz T.、Greathouse T. K.、Marcq E.、Sagawa H., Widemann T., Bezard B., Fouchet T., Lefevre F., Lebonnois S., Atreya S. K., Lee Y. J., Giles R., Watanabe S., Shao W., Zhang X., Bierson C. J.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 639 Pages: A69-A69

    • DOI

      10.1051/0004-6361/202037741

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dayside cloud top structure of Venus retrieved from Akatsuki IR2 observations2020

    • Author(s)
      Sato T.M.、Satoh T.、Sagawa H.、Manago N.、Lee Y.J.、Murakami S.、Ogohara K.、Hashimoto G.L.、Kasaba Y.、Yamazaki A.、Yamada M.、Watanabe S.、Imamura T.、Nakamura M.
    • Journal Title

      Icarus

      Volume: 345 Pages: 113682-113682

    • DOI

      10.1016/j.icarus.2020.113682

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Phosphine gas in the cloud decks of Venus2020

    • Author(s)
      Greaves J. S., Richards A. M. S., Bains W., Rimmer P. B., Sagawa H., Clements D. L., Seager S., Petkowski J. J., Sousa-Silva C., Ranjan S., Drabek-Maunder E., Fraser H. J., Cartwright A., Mueller-Wodarg I., Zhan Zh., Friberg P., Coulson I., Lee E., Hoge J.
    • Journal Title

      Nature Astronomy

      Volume: - Issue: 7 Pages: 1-20

    • DOI

      10.1038/s41550-020-1174-4

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A stringent upper limit of the PH3 abundance at the cloud top of Venus2020

    • Author(s)
      Encrenaz T., Greathouse T. K., Marcq E., Widemann T., Bezard B., Fouchet T., Giles R., Sagawa H., Greaves J., Sousa-Silva C.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 643 Pages: L5-L5

    • DOI

      10.1051/0004-6361/202039559

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Belt-like Distribution of Gaseous Hydrogen Cyanide on Neptune’s Equatorial Stratosphere Detected by ALMA2020

    • Author(s)
      Iino T., Sagawa H., Tsukagoshi T., Nozawa S.
    • Journal Title

      The Astrophysical Journal

      Volume: 903 Issue: 1 Pages: L1-L1

    • DOI

      10.3847/2041-8213/abbb9a

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] SPICAが切り拓くサイエンス:「太陽系・系外惑星」2020

    • Author(s)
      平野照幸、大坪貴文、佐川英夫
    • Journal Title

      天文月報

      Volume: 113 Pages: 784-794

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Presentation] Revealing the dynamics of Venus' upper atmosphere with submillimeter observations2023

    • Author(s)
      Sagawa, H.
    • Organizer
      ALMA at 10 years: Past, Present, and Future
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Doppler-wind measurements using ALMA2023

    • Author(s)
      Hideo Sagawa, Shohei Aoki, Eric Villard, Kazi Rygl
    • Organizer
      International conference on new insights into Mars achieved by remote-sensing observation, numerical simulation, and laboratory experiment of trace gases
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Revisiting Venus Doppler-wind maps obtained by ALMA2021

    • Author(s)
      Hideo Sagawa
    • Organizer
      JpGU 2021 Assembly, Recent advances of Venus science and coming decades (AGU, EGU joint session), Online, June, 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Searching minor species on Venus atmosphere using the high-dispersion spectra taken by IRTF/iSHELL2020

    • Author(s)
      Hideo Sagawa, Takao M. Sato, Hajime Kita
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Recent advances in the solar system science brought by ALMA observations2020

    • Author(s)
      Hideo Sagawa, Takahiro Iino
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2025-01-30  

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