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Collaboration between Akatsuki and high-altitude observatories: Venus glory and atmospheric dynamics in clouds

Research Project

Project/Area Number 16H05738
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Space and upper atmospheric physics
Research InstitutionJapan Aerospace EXploration Agency

Principal Investigator

Satoh Takehiko  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, 教授 (10297632)

Co-Investigator(Kenkyū-buntansha) 鍵谷 将人  東北大学, 理学研究科, 助教 (30436076)
佐藤 隆雄  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, 宇宙航空プロジェクト研究員 (50633509)
大月 祥子  専修大学, 商学部, 准教授 (90523291)
Research Collaborator NAKATANI Yoshikazu  
YONEDA Mizuki  
AKITAYA Hiroshi  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Keywords金星大気 / 後光 / 光散乱 / エアロソル / あかつき / 高高度施設 / 金星 / エアロゾル / 偏光観測 / 偏光 / 大気 / 位相角 / ウォラストンプリズム
Outline of Final Research Achievements

We have carried out a research project to understand what is going on with the Venus’ enormous cloud system (vertical extent ~20 km) by investigating its “glory” as a remarkable signature. Obtained results include: (1) size of Venus cloud particles has been quantified by observing glories; (2) spatio-temporal variations of cloud-top altitude are characterized; and (3) the middle-to-lower cloud layer were intensively investigated by analyzing Akatsui/IR2 night-side data. It is becoming clearer how atmosphere circulates and how various atmospheric waves contributes in the clouds. The stationary gravity-wave features, discovered by LIR, are also (partially if not all) visible in our data set. These will lead us to better understandings how gravity waves, circulation in clouds, and others altogether contribute to generate/maintain the peculiar meteorology of Venus. We also demonstrated the usefulness of applying numerical simulation to infer the underlying physics of observed phenomena.

Academic Significance and Societal Importance of the Research Achievements

金星は「地球の双子星」であるとともに、実は「系外惑星(第2の地球)」を理解する上で重要な対象と考えられている。その金星について大気の性質の基本を理解し、さまざまな現象を理論的に説明できるようになることは、宇宙における惑星環境の普遍的な理解へとつながるものである。母星からのエネルギーを昼面で受け止め、それを大気内循環の駆動源とする、そうした基本構造の理解を目指した研究を実施したものであり、ここから得られたもの(や、得られつつあるもの)は、金星科学にとどまらずより広範な応用範囲と影響範囲をもつものである。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (12 results)

All 2019 2018 2016

All Journal Article (6 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Planetary-scale streak structure reproduced in high-resolution simulations of the Venus atmosphere with a low-stability layer2019

    • Author(s)
      Kashimura Hiroki、Sugimoto Norihiko、Takagi Masahiro、Matsuda Yoshihisa、Ohfuchi Wataru、Enomoto Takeshi、Nakajima Kensuke、Ishiwatari Masaki、Sato Takao M.、Hashimoto George L.、Satoh Takehiko、Takahashi Yoshiyuki O.、Hayashi Yoshi-Yuki
    • Journal Title

      Nature Communications

      Volume: 10 Issue: 1 Pages: 23-23

    • DOI

      10.1038/s41467-018-07919-y

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Initiation of a lightning search using the lightning and airglow camera onboard the Venus orbiter Akatsuki2018

    • Author(s)
      Takahashi, Y., (他22名), H. Ando, K. Sugiyama, H. Kashimura, S. Ohtsuki
    • Journal Title

      Earth, Planets and Space

      Volume: 70 Issue: 1 Pages: 88-88

    • DOI

      10.1186/s40623-018-0836-2

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Nightside winds at the lower clouds of Venus with Akatsuki/IR2: longitudinal, local time, and decadal variations from comparison with previous measurements2018

    • Author(s)
      Peralta, J., K. Muto, R. Hueso, T. Horinouchi, A. Sanchez-Lavega, S. Murakami, P. Machado, E.F. Young, Y.J. Lee, T. Kouyama, H. Sagawa, K. McGouldrick, T. Satoh, T. Imamura, S.S. Limaye, T.M. Sato, K. Ogohara, M. Nakamura, D. Luz
    • Journal Title

      Astrophys. J. Supp.

      Volume: 239(29) Issue: 2 Pages: 29-29

    • DOI

      10.3847/1538-4365/aae844

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Editorial: Topical Collection on Venus2018

    • Author(s)
      Bezard, Bruno ; Russell, Christopher, T. ; Satoh, Takehiko ; Smrekar, Suzanne E. ; Wilson, Colin F.
    • Journal Title

      Spece Science Review

      Volume: 214 Issue: 8

    • DOI

      10.1007/s11214-018-0564-8

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] AKATSUKI returns to Venus2016

    • Author(s)
      Nakamura, M., Imamura, T., Ishii, N., Abe, T., Kawakatsu, Y., et al. (Sato, T.M. 52名中38番目)
    • Journal Title

      Earth, Planets and Space

      Volume: - Issue: 1 Pages: 68-75

    • DOI

      10.1186/s40623-016-0457-6

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Development and in-flight calibration of IR2: 2-um camera onboard Japan’s Venus orbiter, Akatsuki2016

    • Author(s)
      Satoh, T.; Nakamura, M.; Ueno, M.; Uemizu, K.; Suzuki, M.; Imamura, T.; Kasaba, Y.; Yoshida, S.; Kimata, M.
    • Journal Title

      Earth Planet. Space

      Volume: 68:74 Issue: 1 Pages: 1-11

    • DOI

      10.1186/s40623-016-0451-z

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Variation of cloud opacity on night-side disk of Venus2018

    • Author(s)
      Satoh, T., Nakakushi, T., Sato, T. M., Hashimoto, G. L.
    • Organizer
      Asia Oceania Geosciences Society
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fine vertical structure of Venus upper haze as revealed in Akatsuki/IR2 limb images2018

    • Author(s)
      Satoh, T., Sato, T. M.
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Variation of cloud opacity on night-side disk of Venus2018

    • Author(s)
      Satoh, T., Nakakushi, T., Sato, T. M., Hashimoto, G. L.
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] あかつきIR2による金星昼面観測2016

    • Author(s)
      佐藤毅彦
    • Organizer
      日本地球電磁圏惑星圏学会
    • Place of Presentation
      九州大学(福岡県福岡市)
    • Year and Date
      2016-11-21
    • Related Report
      2016 Annual Research Report
  • [Presentation] The latest views of Venus as observed by the Japanese Orbiter "Akatsuki"2016

    • Author(s)
      Takehiko Satoh
    • Organizer
      Division for Planetary Science, American Astronomical Society
    • Place of Presentation
      Pasadena, CA, USA
    • Year and Date
      2016-10-17
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Initial results of IR2 camera on board Akatsuki2016

    • Author(s)
      Takehiko Satoh
    • Organizer
      Asia Oceania Geosciences Society
    • Place of Presentation
      Beijing, China
    • Year and Date
      2016-08-01
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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