Sensitivity analysis on the formation of secondary eyewall

2015 Fiscal Year Final Research Report

• Project/Area Number: 26800250
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: University of the Ryukyus
• Principal Investigator: Ito Kosuke 琉球大学, 理学部, 助教 (10634123)
• Research Collaborator: Takuya Kawabata 気象研究所, 予報研究部, 主任研究官 (80354447)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 台風強度 / 感度解析

Outline of Final Research Achievements

Tropical cyclones are often highly destructive. In this work, sensitivity analysis with a high-resolution nonhydrostatic atmospheric model and its adjoint model is conducted to elucidate the important factors on typhoon Bolaven's secondary eyewall formation (SEF) that influenced the rapid change of its intensity. As a result, the SEF is shown to be sensitive to a humidity profile in the lower atmosphere outside of the SEF region. The impact is verified by additional numerical experiments. These results are presented in several conferences such as American Meteorological Society Hurricane Conference.

Free Research Field

気象学