| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Rapid deepening mechanism of an extremely intense tropical cyclone was studied by using a high-resolution cloud resolving model with a horizontal resolution of a few kilometers that can represent the inner-core structures and processes of the tropical cyclone.
First, we conducted numerical simulations of Typhoon Ida (1958), an extremely intense typhoon with a minimum central pressure of 877 hPa. Extremely rapid deepening of the maximum central pressure drop exceeding 90 hPa/24h was successfully simulated. The model-resolution sensitivity experiments revealed that only the cloud-resolving 2km model could reproduce the maximum intensity and intensification rate of Typhoon Ida since the model could produce the convective activity around the storm core region.
We further investigated future changes of an extremely intense tropical cyclone. The results suggest that the maximum intensity and intensification rate of an extremely intense typhoon will increase in the future warmer climate.
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