气象2017，Vol.43Issue(3)：348-353,6.DOI:10.7519/j.issn.1000-0526.2017.03.011
GPM双频降水测量雷达对降雪的探测能力分析
Study of GPM Dual-Frequency Radar in Detecting Snow
摘要
Abstract
The Global Precipitation Measurement (GPM)mission core observatory was launched in Febru-ary 2014,carrying the dual-frequency precipitation radar (DPR).The DPR consists of two radars with mi-crowave frequencies of Ka and Ku bands.DPR is expected to extend its ability to capture weak rain and snow in higher latitudes.In order to evaluate the ability of DPR in snow detection,four cases are ana-lyzed.As a result,particle phase products of DPR are consistence with the actual weather condition and the temperature of solid snow is lower than -0.5℃.What's more,the heights of most storm tops are lower than 6 km.By comparison,actual Ku-band radar detectability turns out to outperform the Ka band radar in identifying the existence of snow because of an obvious improvement of sensitivity.KaMS and KaHS are also useful.In order to improve snow retrieval,the attenuation correction of snow is very im-portant,especially for wet snow.关键词
GPM/双频降水测量雷达/降雪探测/粒子相态/路径衰减Key words
Global Precipitation Measurement (GPM)/dual-frequency precipitation radar (DPR)/snow detection/particle phase/path attenuation分类
天文与地球科学引用本文复制引用
吴琼,仰美霖,窦芳丽..GPM双频降水测量雷达对降雪的探测能力分析[J].气象,2017,43(3):348-353,6.基金项目
国家自然科学基金项目(41475030,61527805)和北京市自然科学基金(8172022)共同资助 （41475030,61527805）
