气象Issue(5)：612-618,7.DOI:10.7519/j.issn.1000-0526.2014.05.012
鄂西北两次强降雪的滴谱特征和积雪深度预估方法
Droplet Spectrum Characteristics and Depth Forecast Method of Two Snowstorms in Northwest of Hubei
摘要
Abstract
The droplet spectrum variation characteristics and snow depth forecast of the two snowstorms in 14-15 December 2010 and 20-22 January 2012 are studied by using Thies Clima laser precipitation moni-tor (TCLPM)and artificial observation data from Danjiangkou Station.The results show that:(1 )the TCLPM can automatically identify the precipitation phase state.Combined with surface artificial dense ob-servations,the temperature higher than 0.7℃ is for precipitation phase state,less than 0.7℃ is for sleet, below -0.5℃ is for pure snow.At the same time,when the surface temperature is below 0.5℃,snow begins to accumulate.The surface wind speeds in the two processes are relatively slow,conducive to snow accumulation on the ground;(2)the TCLPM can monitor the variation of droplet spectrum characteristics of heavy snowfall weather,the echo intensity (Z),average diameter (Dm ),water content (W ),snowfall particle number concentration (N)which increases with the enhancement of snowfall intensity.During the two snowstorm events,there are different levels of positive correlations among Dm ,Z,N,W and VSD, better correlation between W andVSD,respectively reaching 0.844 and 0.926;(3)Selecting the first-or-der fitting snow particles in water content W and surface snow rate,the snow rate forecast equation is de-rived compare surface snow rate forecast (VSDF)in the pure snow stage and the surface snow depth fore-casts (SDF)to VSD,SD retrieved with the observation data by TCLPM it is found that they are very close,indicating this method can be used to estimate VSD and SD on the surface snow rate and snow depth,which can reflect the main time period with quick increase of surface snow.关键词
Thies Clima激光雨滴谱(TCLPM)/强降雪天气/积雪速率/积雪速率预估Key words
Thies Clima laser precipitation monitor (TCLPM)/snowstorm/rate of snowfall/forecast rate of snowfall分类
天文与地球科学引用本文复制引用
李德俊,熊守权,柳草,万霞,袁正腾,王慧娟..鄂西北两次强降雪的滴谱特征和积雪深度预估方法[J].气象,2014,(5):612-618,7.基金项目
公益性行业（气象）科研专项（GYHY201306040-05和 GYHY201206025）、湖北省气象局科技发展基金项目（2011Y06和2013Z04）及湖北省气象服务中心自立课题（201201）共同资助 （）
