Japan Geoscience Union Meeting 2014

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International Session (Oral)

Symbol A (Atmospheric, Ocean, and Environmental Sciences) » A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS01_30AM2] Extreme Weather in Cities

Wed. Apr 30, 2014 11:00 AM - 12:40 PM 423 (4F)

Convener:*Masayuki Maki(ERCDP, Kagoshima University), Jun Matsumoto(Deaprtment of Geography, Tokyo Metropolitan University), Yoshinori Shoji(The Second Laboratory of Meteorological Satellite and Observation System Research Department, Meteorological Research Institute), Tsuyoshi Nakatani(National Research Institute for Earth Science and Disaster Prevention), Chair:Hirofumi Sugawara(National Defense Academy of Japan)

11:00 AM - 11:15 AM

[AAS01-07] Descending reflectivity core analysis by Ku-band radar

*Eiichi SATO1, Kenichi KUSUNOKI1, Chusei FUJIWARA1, Sadao SAITO1, Yoshinori SHOJI1 (1.Meteorological Research Institute)

Keywords:descending reflectivity core, Ku-band radar, fast scan radar, extreme weather

In order to observe extreme weather such as localized heavy rainfall, tornado etc., we installed a Ku-band radar in Musashino-shi, Tokyo in 2011. Since the radar can create a 3D volume scan per minute, we expect that the data observed by the radar will contribute to understanding mechanisms of such phenomena.In our research, we defined a cell as an area whose reflectivity is ≥ 25dBZ, and a core as a reflectivity peak in the cell. The procedures of the cell/core detection are as follows: 1) conversion from rθ data to xyz data, 2) cell detection by binarization and labeling, and 3) core detection by method of steepest descent(ascent).In this presentation, results of an automatic cell/core detection algorithm will be shown.