| Project/Area Number |
25400219
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
中島 健介 九州大学, 理学研究院, 助教 (10192668)
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| Project Period (FY) |
2013-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | 系外惑星 / 気候 / 同期回転惑星 / 太陽定数 / 暴走温室状態 / 大気大循環モデル / 射出限界 / 惑星半径 / 昼夜間熱輸送 / 生命存在可能性 / 雲スキーム |
|---|
| Outline of Final Research Achievements |
For the purpose of understanding the variety of climate of terrestrial exoplanets, parameter experiments using a general circulation model were performed with various values of planetary radius, rotation rate, solar constant, solar flux distribution. With these experiments, dependence of climate state of terrestrial exoplanets on solar constant, and the occurrence condition of the runaway greenhouse state were investigated. One of the results was that, both for synchronously rotating planets and planets with Earth-like solar flux distribution including diurnal and annual change, the upper limit of outgoing longwave radiation existed and that the runaway greenhouse state emerged with global mean absorbed solar flux exceeding the upper limit of outgoing longwave radiation.
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