| Project/Area Number |
26800245
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | National Institute of Polar Research |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | 水蒸気 / 南極 / 極渦 / 脱水 / 上部対流圏 / 成層圏水蒸気 / 水蒸気ゾンデ / 衛星観測 / 粒跡線 / 脱水過程 |
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| Outline of Final Research Achievements |
Although water vapor variations around the tropopause have a large radiative forcing, its observation has not been conducted sufficiently, especially in the Antarctic. We successfully obtained accurate water vapor concentration data with high vertical resolution in the Antarctic tropopause region by the balloonborne hygrometer observations at Syowa Station (69S, 40E). Our integrated study based on balloon and satellite observations and a trajectory analysis showed interannual variations of dehydration amount in the Antarctic stratosphere and several kinds of mechanisms contributing to dehydration and rehydration in the Antarctic tropopause region. These results will contribute to predicting water vapor change in the Antarctic tropopause region and estimating its impact on the future climate under the condition of increasing greenhouse gases.
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