Preliminary Results of Weather Radar Observations of Sakurajima Volcanic Smoke
Masayuki Maki*1, Masato Iguchi*2, Takeshi Maesaka*3, Takahiro Miwa*3, Toshikazu Tanada*3, Tomofumi Kozono*4, Tatsuya Momotani*5, Akihiko Yamaji*5, and Ikuya Kakimoto*6
*1Research and Education Center for Natural Hazards, Kagoshima University
1-21-40 Korimoto, Kagoshima 890-0065, Japan
*2Disaster Prevention Research Institute, Kyoto University, Kagoshima, Japan
*3National Research Institute for Earth Science and Disaster Prevention, Tsukuba, Japan
*4Graduate school, Tohoku University, Sendai, Japan
*5Japan Weather Agency, Tokyo, Japan
*6Mitsubishi Electric Co., Hyogo, Japan
Preliminary results of quantitative analysis of volcanic ash clouds observed over the Sakurajima volcano in Kagoshima, Japan, were obtained by using weather radar and surface instruments. The Ka-band Doppler radar observations showed the inner structure of a volcanic ash column every two minutes after an eruption. Operational X-band polarimetric radar provides information on three-dimensional ash fall amount distribution. The terminal fall velocity of ash particles was studied by using optical disdrometers, together with the main specifications of observation instruments.
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