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_30PM1] Extreme Weather in Cities

Wed. Apr 30, 2014 2:15 PM - 3:45 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:Masayuki Maki(ERCDP, Kagoshima University)

2:30 PM - 2:45 PM

[AAS01-14] Statistical Analysis of Large Drop Occurrence and Its Effect on Drop Size Distribution

*Sung-a JUNG1, Masayuki MAKI2, Dong-in LEE1, Ji-hyeon KIM3, Shyuichi TSUCHIYA4 (1.Pukyong National University, Korea, 2.Kagoshima University, Japan, 3.Weather Radar Center, Korea, 4.National Institute for Land and Infrastructure Management, Japan)

Keywords:large drop, DSD, 2DVD

A large data set of raindrop size distribution (DSD) measured by 2-Dimensional Video Distrometer (2DVD) on 12 locations in Japan is analyzed using the truncated modified gamma DSD model and the normalized gamma DSD model. The present study seeks to: 1) explore the general properties of DSD observed at Kanto, Hokuriku, Nagoya, Kinki and Kyushu in Japan; 2) find the governing parameters of DSD models in different geographycal and seasonal regime; 3) statistics of big drops occurrence and instrinsic shape of the DSD with extremely large drops; 4) find relationships between DSD parameters such as the shape and slope parameters, the generalized intercept parameter and volume-weighted mean diameter, and etc. The present study on stratistical analysis of DSD provide us information which is nesessary to understand big drop microphysics and precipitation.