Filtering effect of the dynamical structure on the dehydration around the tropical tropopause layer (TTL)
| Project/Area Number |
26800251
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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 | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
SUZUKI Junko 国立研究開発法人海洋研究開発機構, 大気海洋相互作用研究分野, 技術研究員 (50512878)
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| Research Collaborator |
NISHI Noriyuki 福岡大学, 理学部, 准教授 (00222183)
HASHIGUCHI Hiroyuki 京都大学, 生存圏研究所, 教授 (90293943)
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| Project Period (FY) |
2015-03-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | 熱帯対流圏界層 / 赤道波 / 水蒸気 / 対流圏界層 / インドネシア / 巻雲 / 海大陸 |
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| Outline of Final Research Achievements |
We have investigated the dynamical field in the tropical tropopause layer (TTL) which works as a filter for a upper propagating wave and water vapor.
We confirmed using the NOAA OLR data and ERA-Interim data that the Walker circulation in the western hemisphere around the TTL could control the number of the equatorial Kelvin wave cases. We conducted the special sonde observation at Indonesia on December 2015. The vertical profiles of the water vapor and the dynamical fields indicate that the cirrus cloud appeared when the equatorial Kelvin wave caused good temperature condition for the cirrus appearance. In this time, the temperature inversion layer due to the equatorial Kelvin wave adjusts the cirrus cloud top. It is important that the Kelvin wave, one of the most frequently disturbance in the TTL could control the cirrus cloud.
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Report
(4 results)
Research Products
(18 results)
