2010—2012年山西省降水地面雨滴谱特征对比

Comparison of the Precipitation Surface Raindrop Spectrum Characteristics during 2010 to 2012 inShanxi

利用2010—2012年OTTParsivel激光降水粒子谱仪在山西汾阳和方山两个站点观测的雨滴谱资料，分析了两地区对流性和层状性降水滴谱特征。结果表明：两地层状性降水发生的频率较大，对流性降水在方山的发生频率大于汾阳。对两类降水而言，不同地区的雨滴谱特征有所不同，方山地区降水的雨滴数浓度、液态含水量、平均雨强、雷达反射率均高于汾阳地区，汾阳和方山雨滴平均谱分布均呈单峰型，Gamma分布对层状性降水拟合效果优于对流性降水。两地对流性降水的μ-λ关系相差较小。

Using the raindrop spectrum data observed from OTT Parsivel precipitation particle spectrometer in Fenyang and Fangshan spots of Shanxi during 2010 to 2012, the convectional and layered precipitation droplet spectrum characteristics in two area are analyzed. The resuhs show： the layered precipitation had a higher frequency, and the occurrence frequency of convectional precipitation in Fangshan was greater than that in Fenyang. In different regions, the raindrop spectrum characteristics were different for both kinds of precipitation. Raindrop number concentration, liquid water content, average rainfall intensity and the radar reflectivity in Fangshan were higher than that in Fenyang area. The raindrop average spectrum distribution showed a single peak type in both area. The fitting efficiency of layered precipitation using the Gamma distribution was better than that of convectional precipitation. The difference about μ-λ relationship of convectional precipitation between two areas was not significant.