[A-AS01_30PM1] Extreme Weather in Cities

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

*JUNG Sung-a¹、MAKI Masayuki²、LEE Dong-in¹、KIM Ji-hyeon³、TSUCHIYA Shyuichi⁴ (1.Pukyong National University, Korea、2.Kagoshima University, Japan、3.Weather Radar Center, Korea、4.National Institute for Land and Infrastructure Management, Japan)

キーワード：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.