Horizontal transport of sea spray droplets intensifying tropical cyclones
| Project/Area Number |
16K13884
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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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 | University of the Ryukyus |
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Principal Investigator |
ITO Kosuke 琉球大学, 理学部, 助教 (10634123)
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| Research Collaborator |
TAKAGAKI Naohisa 兵庫県立大学, 工学部, 助教
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 台風 / 波しぶき / 数値モデル / 急発達 |
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| Outline of Final Research Achievements |
Conventional models assume that surface evaporation depends on local physical variables. However, sea spray droplets can remain suspended in the air for several minutes before evaporating under humid conditions in a tropical cyclone (TC). Therefore, spray-mediated evaporation could occur about a few kilometers away from the spray genesis location according to a boundary layer inflow toward the TC center. Because the TC intensity depends on the location in which the evaporation occurs, we conducted a numerical simulation with an idealized atmospheric model that can consider both droplet flight duration and evaporation timescale. As expected, the minimum sea level pressure of a violent TC decreased became strong on the order of 10 hPa in a quasi-steady state and intensification rate became large when the transport of sea spray droplets was incorporated.
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Report
(3 results)
Research Products
(11 results)
