日本地球惑星科学連合2019年大会

講演情報

[E] 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-AS02] 台風研究の新展開~過去・現在・未来

2019年5月30日(木) 13:45 〜 15:15 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:金田 幸恵(名古屋大学宇宙地球環境研究所)、和田 章義(気象研究所台風・災害気象研究部)、伊藤 耕介(琉球大学)、宮本 佳明(慶應義塾大学 環境情報学部)

[AAS02-P03] Moisture Budget Analysis for Hurricane Precipitation on Texas

*飯塚 聡1酒井 直樹1 (1.防災科学技術研究所)

キーワード:ハリケーン ハービー、降水、水蒸気収支

In August 2017, Hurricane Harvey brought the unprecedented amount of rainfall and catastrophic flooding on the Houston metropolitan area, as it stagnated near the coast of Texas for several days after its decline to a tropical storm intensity. The present study compares the moisture budget for rainfall associated with Harvey with those of past hurricanes making landfall on Texas. It seems that the high pressure over the west coast region of the US, along with the meandering of the subtropical jet starting from the periphery of Hawaii and toward the south in Texas, stagnated Hurricane Harvey around the coast of Texas for several days. The meandering of the subtropical jet toward the south in Texas also caused the largest convergence of moisture advected from the Gulf of Mexico efficiently over Texas, although the accompanied high pressure was not extraordinary event. Therefore, it is suggested that surrounding meteorological conditions can greatly affect rainfall related to tropical cyclones.