| Budget Amount *help |
¥35,230,000 (Direct Cost: ¥27,100,000、Indirect Cost: ¥8,130,000)
Fiscal Year 2021: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Fiscal Year 2020: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Fiscal Year 2019: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Fiscal Year 2018: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
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| Outline of Final Research Achievements |
An estimation method for surface heat flux during typhoons based on satellite observations has been developed. This has significantly improved estimation during typhoons compared to previous global products. The near-surface air-specific humidity required for estimation can be estimated closer to the center of the typhoon, and it is possible to better capture the characteristics of water vapor concentration near the center of the typhoon. It has become possible to estimate high wind speeds exceeding 30 m/s. The validity of the new method was confirmed by comparison with independent in situ observations. Surface heat fluxes were calculated based on these physical quantity estimates, and a surface flux data set during typhoons was constructed. This dataset makes it possible to quantitatively investigate the change in surface heat flux from the occurrence of a typhoon to its extinction.
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