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Study on the Venus atmospheric superrotation with a focus on the thermal tide and mean meridional circulation mechanisms

Research Project

Project/Area Number 25400470
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionKyoto Sangyo University

Principal Investigator

TAKAGI Masahiro  京都産業大学, 理学部, 准教授 (00323494)

Project Period (FY) 2013-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords金星大気スーパーローテーション / 熱潮汐波 / 子午面循環 / 惑星大気 / 金星探査機あかつき / スーパーローテーション / 極渦 / 大気大循環 / 大気スーパーローテーション / ギーラッシュメカニズム
Outline of Final Research Achievements

We conducted a study on the Venus atmospheric superrotation with a focus on the thermal tide and mean meridional circulation (Gierasch) mechanisms. The results show that both these two mechanisms are essential to the atmospheric superrotation at the cloud levels. We have also succeeded in reproducing the realistic atmospheric structures in the Venus upper atmosphere. It has been found that (1) the active baroclinic instability waves are excited at the lower cloud levels with lower static stability, and the so-called Rossby waves are explained by the baroclinic instability waves; (2) the cold collar, which is a cold latitudinal band surrounding the warm polar vortex at the cloud top levels, are successfully reproduced in the GCM results, and the mean meridional circulation induced by the thermal tide is quite important for the generation of the cold collar.

Report

(5 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (22 results)

All 2016 2015 2014 2013

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (16 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] The puzzling Venusian polar atmospheric structure reproduced by a general circulation model2016

    • Author(s)
      H. Ando, N. Sugimoto, M. Takagi, H. Kashimura, T. Imamura, Y. Matsuda
    • Journal Title

      Nature Communications

      Volume: 7:10398 Issue: 1 Pages: 1-8

    • DOI

      10.1038/ncomms10398

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Inverse insolation dependence of Venus' cloud-level convection2014

    • Author(s)
      Imamura, T., T. Higuchi, Y. Maejima, M. Takagi, N. Sugimoto, K. Ikeda, and H. Ando
    • Journal Title

      Icarus

      Volume: 228 Pages: 181-188

    • DOI

      10.1016/j.icarus.2013.10.012

    • Related Report
      2014 Research-status Report 2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Baroclinic instability in the Venus atmosphere simulated by GCM2014

    • Author(s)
      Sugimoto, N., M. Takagi, and Y. Matsuda
    • Journal Title

      J. Geophys. Res. Planets

      Volume: 119 Issue: 8 Pages: 1950-1968

    • DOI

      10.1002/2014je004624

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Waves in a Venus general circulation model2014

    • Author(s)
      Sugimoto, N., M. Takagi, and Y. Matsuda
    • Journal Title

      Geophys. Res. Lett.

      Volume: 41 Issue: 21 Pages: 7461-7467

    • DOI

      10.1002/2014gl061807

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effects of gravity waves on the day-night difference of the general circulation in the Venusian lower thermosphere2013

    • Author(s)
      Hoshino, N.; Fujiwara, H.; Takagi, M.; Kasaba, Y.
    • Journal Title

      Journal of Geophysical Research: Planets

      Volume: 118 Issue: 10 Pages: 2004-2015

    • DOI

      10.1002/jgre.20154

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Baroclinic modes in the atmosphere on Venus simulated by AFES2013

    • Author(s)
      N. Sugimoto, M. Takagi, Y. Matsuda, Y. O. Takahashi, M. Ishiwatari, and Y.-Y. Hayashi
    • Journal Title

      Theoretical and Applied Mechanics Japan

      Volume: 61 Pages: 11-21

    • NAID

      130004463834

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] Structure and dynamical effects of the thermal tide in the Venus atmosphere2016

    • Author(s)
      Masahiro Takagi
    • Organizer
      DPS 48/EPSC 11
    • Place of Presentation
      Pasadena, CA, USA
    • Year and Date
      2016-10-16
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 金星大気の熱潮汐波2016

    • Author(s)
      高木征弘
    • Organizer
      日本気象学会2016年度春季大会
    • Place of Presentation
      東京都渋谷区国立オリンピック記念青少年総合センター
    • Year and Date
      2016-05-18
    • Related Report
      2016 Annual Research Report
  • [Presentation] Thermal tide in the Venus atmosphere2016

    • Author(s)
      Hiroki Ando
    • Organizer
      International Venus Conference 2016
    • Place of Presentation
      Oxford, UK
    • Year and Date
      2016-04-04
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 金星大気スーパーローテーションのメカニズム2015

    • Author(s)
      高木征弘・志水達也・杉本憲彦・松田佳久
    • Organizer
      日本気象学会2015年度秋季大会
    • Place of Presentation
      京都テルサ(京都府京都市)
    • Year and Date
      2015-10-29
    • Related Report
      2015 Research-status Report
  • [Presentation] 金星上層大気中の波2015

    • Author(s)
      杉本憲彦・高木征弘・松田佳久
    • Organizer
      日本気象学会2015年度秋季大会
    • Place of Presentation
      京都テルサ(京都府京都市)
    • Year and Date
      2015-10-29
    • Related Report
      2015 Research-status Report
  • [Presentation] Simulation of Venusian atmosphere by AFES2015

    • Author(s)
      N. Sugimoto, H. Kashimura, M. Takagi, Y. Matsuda, H. Ando, T. Imamura, W. Ohfuchi, T. Enomoto, Y.O. Takahashi, and Y.Y. Hayashi
    • Organizer
      EPSC 2015
    • Place of Presentation
      Nantes, France
    • Year and Date
      2015-09-27
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Atmospheric structure in the Venusian polar region; first report on reproduction by General Circulation Model2015

    • Author(s)
      H. Ando, N. Sugimoto, M. Takagi, H. Kashimura, T. Imamura, Y. Matsuda
    • Organizer
      EPSC 2015
    • Place of Presentation
      Nantes, France
    • Year and Date
      2015-09-27
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Wave activities in the Venus atmospheres simulated in a GCM2015

    • Author(s)
      M. Takagi, N. Sugimoto, Y. Matsuda
    • Organizer
      日仏連携による惑星大気モデル研究
    • Place of Presentation
      神戸大学CPS(兵庫県神戸市)
    • Year and Date
      2015-05-11
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] 太陽加熱が金星下層の大気循環に与える影響2014

    • Author(s)
      高木征弘・杉本憲彦・松田佳久
    • Organizer
      研究集会「地球流体における流れの多様性と普遍性の力学」
    • Place of Presentation
      東京大学大気海洋研究所(千葉県)
    • Year and Date
      2014-11-20 – 2014-11-21
    • Related Report
      2014 Research-status Report
  • [Presentation] 金星大気スーパーローテーションの構造と維持メカニズム,2014

    • Author(s)
      高木征弘・杉本憲彦・松田佳久
    • Organizer
      日本気象学会2014年度秋季大会
    • Place of Presentation
      福岡国際会議場(福岡県)
    • Year and Date
      2014-10-21 – 2014-10-23
    • Related Report
      2014 Research-status Report
  • [Presentation] Baroclinic instability in the Venus atmosphere simulated by general circulation mode2014

    • Author(s)
      N. Sugimoto, M. Takagi, Y. Matsuda
    • Organizer
      EPSC 2014
    • Place of Presentation
      Cascais, Portugal
    • Year and Date
      2014-09-07 – 2014-09-12
    • Related Report
      2014 Research-status Report
  • [Presentation] Venusian Polar Vortex reproduced in an Atmospheric General Circulation Model2014

    • Author(s)
      H. Ando, H. Kashimura, N. Sugimoto, M. Takagi, T. Imamura
    • Organizer
      40th COSPAR Scientific Assembly
    • Place of Presentation
      Moscow Univ. (Moscow, Russia)
    • Year and Date
      2014-08-02 – 2014-08-10
    • Related Report
      2014 Research-status Report
  • [Presentation] General circulation in the Venus lower atmosphere2014

    • Author(s)
      M. Takagi, N. Sugimoto, Y. Matsuda
    • Organizer
      40th COSPAR Scientific Assembly
    • Place of Presentation
      Moscow Univ. (Moscow, Russia)
    • Year and Date
      2014-08-02 – 2014-08-10
    • Related Report
      2014 Research-status Report
  • [Presentation] Baroclinic modes in the Venus atmosphere simulated by AFES (Atmospheric GCM For the Earth Simulator),2013

    • Author(s)
      Sugimoto, N., Takagi, M., and Y. Matsuda
    • Organizer
      International Venus Workshop
    • Place of Presentation
      Catania, Italy
    • Related Report
      2013 Research-status Report
  • [Presentation] Structures and generation mechanisms of the Venus atmospheric superrotation2013

    • Author(s)
      Takagi, M., and Y. Matsuda
    • Organizer
      International Venus Workshop
    • Place of Presentation
      Catania, Italy
    • Related Report
      2013 Research-status Report
  • [Presentation] 金星のスーパーローテーションのメカニズムについて2013

    • Author(s)
      高木征弘・松田佳久
    • Organizer
      地球流体力学研究集会「地球流体における波動と対流現象の力学」
    • Place of Presentation
      九州大学応用力学研究所
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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