山西省不同地区雨滴谱的统计特征  

Statistical characteristics of raindrop size distribution in different regions of Shanxi

作　　者：杨俊梅[1,2] 陈宝君[3] 韩永翔[1] 李培仁[2] 

机构地区：[1]南京信息工程大学中国气象局气溶胶-云-降水重点开放实验室,南京210044 [2]山西省人工降雨防雹办公室,太原030002 [3]南京大学大气科学学院,南京210023

出　　处：《气象科学》2016年第1期88-95,共8页Journal of the Meteorological Sciences

基　　金：国家自然科学基金资助项目(41175118);公益性行业(气象)科研专项(GYHY201306040;GYHY201306065)

摘　　要：利用2010—2012年OTT Parsivel激光降水粒子谱仪在山西省6个地区观测的雨滴谱资料,调查了不同地区对流性和层状性降水滴谱特征。结果表明:对两类降水而言,山区降水强度大于平原地区,且山区降水广义截距参数N_w和质量加权平均直径Dm均大于平原地区。两种地形层状性和对流性降水的雨滴平均谱分布均呈明显单峰型,两种降水的峰值直径分别为0.56 mm和0.94 mm,对流性降水雨滴谱明显比层状谱宽。Gamma分布较好的拟合了平均谱,统计了对流性降水Gamma分布参数μ-λ关系。此外,对N_w-R、D_m-R以及Z-R关系也进行了研究。By using the raindrop size distribution data of six regions in Shanxi province from the OTT Parsivel laser precipitation particle spectrometer from 2010 to 2012,the characteristics of convective and stratiform raindrop size distribution in different areas are studied. Results show that the rainfall intensity,the generalized intercept parameter（ N_w） and mass-weighted mean diameter（ Dm） of raindrops in mountainous area are much greater than those in flat area. The raindrop size distribution of these two types of precipitation shows obvious unimodal distribution and their peak diameters are 0. 94 mm and 0. 56 mm.The Gamma distribution is fit better for average spectra. The shape（ μ）-slope（ λ） relationship of the Gamma distribution is also derived for convective rain. Besides,Z-R,N_w-R and D_m-R relationships are also analyzed.

关 键 词：降水 雨滴谱 μ-λ关系 Z-R关系 山西 

分 类 号：P426.6[天文地球—大气科学及气象学]