| Project/Area Number |
16H06720
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Hamada Atsushi 東京大学, 大気海洋研究所, 特任助教 (30550008)
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| Research Collaborator |
Takayabu Yukari N. 東京大学, 大気海洋研究所, 教授
Higuchi Atsushi 千葉大学, 環境リモートセンシング研究センター, 准教授
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| Project Period (FY) |
2016-08-26 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | 鉛直流 / 積雲 / 積乱雲 / 静止衛星 / 衛星観測 / トラッキング / 気象学 / 大気現象 / リモートセンシング |
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| Outline of Final Research Achievements |
An algorithm to estimate cloud-top vertical velocity associated with cumulus clouds by using so-called "rapid-scan" measurements from a Japanese geostationary satellite, Himawari-8, is developed. The algorithm is applied to 2-yr observation data, and statistical characteristics of the obtained cloud-top vertical velocity are examined.
In the tropics (15S-15N), the numbers of cumulus samples are higher/lower in the boreal summer/winter. The distribution of terminal cloud-top heights over the oceans is consistent with the so-called "trimodal characteristics" pointed out in the previous studies. The statistical distribution of the cloud-top vertical velocity is generally independent of the season. Over both land and the oceans, the cloud-top vertical velocities are slightly increased around the freezing level (~5km), probably indicating an importance of latent heat release by freezing of cloud droplets in the development of cumulus clouds in the tropics.
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