2021 Fiscal Year Final Research Report
Vertical transport from the lower atmosphere to space via atmospheric waves on Mars
Project/Area Number |
19K03943
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 17010:Space and planetary sciences-related
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Research Institution | Tohoku University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
青木 翔平 東北大学, 理学研究科, 客員研究者 (60773629)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | 火星 / 水 / 大気 / 進化 / 観測 / 大気波動 / 物質輸送 |
Outline of Final Research Achievements |
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.
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Free Research Field |
惑星大気
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Academic Significance and Societal Importance of the Research Achievements |
火星は兄弟星でありながら全く異なる惑星環境を形成するに至った。多様性に富むこれら地球型惑星の水・大気進化解明は、過去そして現在における生命生存環境の理解に重要である。表層から宇宙まで領域間をつなぐ新たな研究手法を実現したことで、火星における水・大気の新たな消失パスの理解に貢献した。今後加速する火星探査開拓時代へ向けた複合ミッションの長期的な技術要素土台構築へとつながる。
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