日本地球惑星科学連合2018年大会

講演情報

[EE] ポスター発表

セッション記号 A (大気水圏科学) » A-AS 大気科学・気象学・大気環境

[A-AS03] 最新の大気科学:台風研究の新展開~過去・現在・未来

2018年5月23日(水) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:中野 満寿男(海洋研究開発機構)、和田 章義(気象研究所台風研究部)、金田 幸恵(名古屋大学宇宙地球環境研究所、共同)、伊藤 耕介(琉球大学)

[AAS03-P07] Statistical Characteristics of Rainfalls of Typhoons Affecting Taiwan and Simulations of Typhoon Nepartak (2016)

*Jian-Liang Wang1Jheng-Kai Chen1Yu-Ching Lin1Ming-Da Tsai1Ing-Jiunn Su2 (1.Dept. of Environmental Information and Engineering, CCIT, National Defense Univ., Taiwan、2.Dept. of Electrical and Electronic Engineering, CCIT, National Defense Univ., Taiwan)

キーワード:4th-Track Typhoon, WRF Numerical Simulation, Microphysics Scheme

For typhoons affecting Taiwan in the past 100 plus years (1911-2016), the tracks have been divided into 9 categories by the Central Weather Bureau. Among those categories, typhoons along the 4th track, coming from the Pacific Ocean, crossing South Taiwan, and moving westward or northwestward afterwards, often brought tremendous rainfalls and caused catastrophic damages in the mountainous areas or along rivers in south Taiwan, e.g., Typhoons Fanapi (2010) and Nepartak (2016). For the purpose of disaster mitigation, it is desired to know the rainfall patterns associated with the 4th-track typhoons. Firstly, this study examined the qualitative statistical characteristics for the 4th-track typhoons in the past 20 years. It was shown that the location of peak accumulated rainfall was in the east of Taiwan before landfall and moved to the south of Taiwan afterwards for the 4th-track typhoons. Secondly, Typhoon Nepartak (2016) was simulated as a case study using the WRF model to examine the sensitivities of typhoon track, intensity, and rainfall pattern to microphysics schemes. Six different microphysics schemes have been tested. Among them, the Thompson aerosol-aware scheme has the closest simulated rainfall patterns and accumulated rainfall peaks compared with observations. However, the choice of microphysics schemes has little impacts on the typhoon’s track and intensity. In this paper, the impacts of microphysics schemes on rainfall patterns have been closely examined and the results will be shown and discussed in details of comparisons among different microphysics schemes in the conference.