气象2017，Vol.43Issue(12)：1473-1486,14.DOI:10.7519/j.issn.1000-0526.2017.12.003
毫米波云雷达冻雨-降雪微物理和动力特征分析
Microphysics and Dynamic Characteristic Analysis of Freezing Rain and Snow Observed by Millimeter-Wave Radar
摘要
Abstract
The refinement research of the vertical structure of freezing rain and snow is very lacking.To carry out this kind of research,in this paper we extract reflectivity factor and velocity spectrum width as well as the skewness which can reflect phase state of precipitation particles originally from spectrum data observed by vertical point of Ka-band millimeter-wave radar.After obtaining the falling velocity of precipitation particles through rising air speed,and the mean particles radius in the vertical direction,we analyze the changes in the liquid water content and ice water content in the vertical structure as well as the changes of the particles combined with sounding data and several parameters in the falling process.The results show that echo characteristic of freezing rain is uneven lamellar structure,while the snow's filar detailed structure is obvious.The initial mean radius of precipitation particles of freezing rain and snow fall distributes separately near 40 and 120 mm.From the initial precipitation particles to quickly coagulating and forming big particles,freezing raindrops need to go through about 0.2 km in the process.The cloud top is 0.1 km higher than the top of liquid water content and ice water content.The water content within the higher range is small,and the parameters reflecting the change of particles in vertical structure are consistent.关键词
毫米波云雷达/冻雨/降雪/微物理/动力特征Key words
millimeter-wave radar/freezing rain/snow/microphysics/dynamic characteristics分类
天文与地球科学引用本文复制引用
王柳柳,刘黎平,余继周,王志锐,郑佳锋,王瑾..毫米波云雷达冻雨-降雪微物理和动力特征分析[J].气象,2017,43(12):1473-1486,14.基金项目
国家自然科学基金项目(41675023)、公益性行业(气象)科研专项(GYHY201306051)和黔省专合字[2011]11号共同资助 （41675023）
