Temporal and Spatial Properties of Raindrop Size Distributions within the Stratiform precipitation Cloud Based on the Doppler Velocity Spectrum of L-band Wind Profiler
With the vertical point power spectral density distribution of 1320 MHz wind profiler,the raindrop size distributions(RSDs) and microphysical parameters is studied within the scope of 700-3300m height during the stratiform precipitation region in Huayin,Shanxi on May 14,2009.In this rain event,the number concentrations altitude of large size raindrops appear close relationship with ground rainfall intensity.The higher number concentration of larger particles in the initial precipitation is in the lowest height but appears in highest altitude in the later stage.The decreasing of the larger and smaller particles number concentration is caused by breakup of the larger raindrop and evaporation of the smaller raindrop,also the medium raindrops number concentration increases with the decreasing of altitude.In this Stratiform precipitation with weak convection,the relationship between reflectivity and liquid water content in the precipitation cloud calculated by the raindrop size distribution is Z=1.69×104M1.5,the relationship between reflectivity and rain intensity is Z=256I1.4 which is between stratiform cloud and convective cloud.The slope factor of the Gamma function has close relationship with precipitation intensity,and the number concentration of larger raindrop and the precipitation intensity are positive correlation.
Wind Profiler Radar power spectral density distribution (Doppler velocity spectrum) Raindrop size dirtributions retrieving Gamma function Precipitation cloud parameters
Zheng Ruan Ge Runsheng Bin Lingen Ming Hu Ma JianLi
State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Science, Beijing 100081 ;N Northwest Regional Air Traffic Management Bureau of CAAC,710000 Beijing Weather Modification Office,Beijing 10086
国际会议
北京
英文
186-200
2013-03-27（万方平台首次上网日期，不代表论文的发表时间）