日本地球惑星科学連合2019年大会

講演情報

[J] 口頭発表

セッション記号 M (領域外・複数領域) » M-IS ジョイント

[M-IS27] 大気電気学:大気電気学研究の自然災害軽減への応用

2019年5月28日(火) 09:00 〜 10:30 202 (2F)

コンビーナ:芳原 容英(電気通信大学 大学院情報理工学研究科)、鴨川 仁(東京学芸大学教育学部物理学科)、座長:森本 健志

09:45 〜 10:00

[MIS27-04] 日本国内での豪雨に伴う雷放電を用いた降水量の推定

*小川 哲也1芳原 容英1岩崎 博之2Stan Heckman3Michael Stock3 (1.電気通信大学大学院、2.群馬大学、3.EarthNetworks)

キーワード:雷、トータル雷、極端気象

In this study, we examined the relationship between total lightning (TL) and heavy rainfall in high spatio-time resolution by using 37 severe thunderstorms in Japan. TL is continuously monitored by the Japanese Total Lightning Network (JTLN) deployed by UEC and operated jointly by UEC and EarthNetworks, whilst high spatio-temporal precipitation data is obtained by eXtended Rader Information Network (XRAIN) operated by Ministry of Land, Infrastructure, Transport and Tourism in Japan. As a result, positive linear relation with rather high cross correlation (r2 ~ 0.54 between TL and Precipitation Volume (PV) [m3] has been obtained. The cross correlation between TL and PV is much higher than that for cloud-to-ground lightning (CG) and PV. Although the slope of linear relation (TL vs. PV) varies depending on heavy rain events, TL can be promising tool to estimate severe rainfall.