[M-IS27] 大気電気学：気候変動に関連した大気電気現象

[MIS27-06] Thunderstorms and total lightning characteristics causing heavy precipitation in Japan

*DEBRUPA MONDAL¹、Yasuhide Hobara^1,2、Hiroshi Kikuchi² (1.Department of Computer and Network Engineering, The University of Electro-Communications、2.Center for Space Science and Radio Engineering, The University of Electro-Communications)

キーワード：Heavy precipitation events, X-band MP radar data, Total lightning

With the changing global climate, the frequency and severity of weather-related disasters (flash flood, tropical cyclones, hurricanes etc.) are on the rise. The annual number of days with >200 mm of rain is increasing in Japan, and scientists predict this long-term trend will continue steadily or may increase. Previous study (Ogawa et al, 2018) showed a positive correlation between time series of number of lightning strokes and ground precipitation volume. In this study, several isolated thunderstorm events with heavy precipitation have been analysed in detail. Japanese Total Lightning Network (JTLN) is used to study the lightning characteristics (occurrence, type of strokes, peak current etc.) from 16 stations for different extreme weather events. The full volume scan data from the X-band Multi Parameter radar (1-minute time resolution, 250 m spatial resolution, cover most part of Japan) are used to analyse heavy precipitation events reported in Japan. We are going to present and compare the spatio-temporal dependence of ground rainfall with precipitation characteristics at several different altitudes and lightning parameters around heavy precipitation.