日本地球惑星科学連合2014年大会

講演情報

インターナショナルセッション(口頭発表)

セッション記号 A (大気海洋・環境科学) » A-AS 大気科学・気象学・大気環境

[A-AS01_30PM1] Extreme Weather in Cities

2014年4月30日(水) 14:15 〜 15:45 423 (4F)

コンビーナ:*真木 雅之(鹿児島大学地域防災教育研究センター)、松本 淳(首都大学東京大学院都市環境科学研究科地理環境科学専攻)、小司 禎教(気象研究所気象衛星・観測システム研究部第2研究室)、中谷 剛(独立行政法人 防災科学技術研究所)、座長:真木 雅之(鹿児島大学地域防災教育研究センター)

15:00 〜 15:15

[AAS01-P02_PG] Development of high resolution spatio-temporal precipitation data using a network of polarimetric X-band radars in Japan

ポスター講演3分口頭発表枠

*KIM Yu-ra1LEE Dong-in1JEONG Jong-hoon1MAKI Masayuki2 (1.Department of Environmental Atmospheric Sciences, Pukyong National University、2.Department of Research and Education Center for Natural Hazards, Kagoshima University)

キーワード:convective cell, X-band polarimetric radar, high resolution precipitation data

Localized convective precipitation develops rapidly in a very short time and is conducive to extreme local rainfall amount. The X-band polarimetric radar is useful to analyze the convective precipitation because it can provide us polarimetric radar parameters which are useful to understand microphysical process in the precipitation. However, the radar observation has some limitations in detecting initial stage of rapidly developing convective cell; the radar volume scan strategy adopted in operational radar is 5 minute interval which is not enough for measuring rapidly developing convective precipitation. To detect the early stage of convective cell, we developed the algorithm which is based on the interpolation method both in space and time. The algorithm reproduces higher resolution spatio-temporal volumetric data using the operational network of four X-band polarimetric radars. The mosaic of multiple radars could be benefit for increased sampling into a certain volume. In addition, different scan strategy at each radar also improve spatio-temporal resolution. The algorithm is applied to radar data of convective precipitations observed in Kanto area in 2012. The new volumetric data can recognize more detail about echo which developed rapidly and detect the first appearance of convective echo at upper layer. Early detection of convective precipitation at upper layer can be useful for nowcasting or very short-term forecasting.