###
气象:2017,43(3):348-353
本文二维码信息
码上扫一扫!
GPM双频降水测量雷达对降雪的探测能力分析
(1.中国科学院大气物理研究所中层大气与全球环境探测实验室,北京 100029 中国科学院大学, 北京 100049 国家卫星气象中心,北京 100081;2.中国气象局北京城市气象研究所,北京 100089;3.国家卫星气象中心,北京 100081)
Study of GPM Dual Frequency Radar in Detecting Snow
(1.Key Laboratory for Middle Atmosphere and Global Environmental Observation (LAGEO), Institute of Atmosphere Physics, Chinese Academy of Sciences, Beijing 100029 University of Chinese Academy of Sciences, Beijing 100049 National Satellite Meteorological Centre, Beijing 100081;2.Institute of Urban Meteorology, China Meteorological Administration, Beijing 100089;3.National Satellite Meteorological Centre, Beijing 100081)
摘要
图/表
参考文献
相似文献
本文已被:浏览 1079次   下载 1744
投稿时间:2016-05-10    修订日期:2016-08-03
中文摘要: 以双频降水测量雷达为主载荷的GPM卫星于2014年2月发射升空。由于轨道倾角以及仪器通道的设置,大大提升了对弱降水和降雪的探测能力。通过四次降雪个例,分析比较了双频降水测量雷达的三种扫描模式(Ku,KaMS和KaHS)对降雪探测能力的差异。结果表明:DPR相态产品和地面实际观测结果比较一致,固态降雪温度<-0.5℃并且降雪发生时的风暴顶高度大多<6 km。Ku波段雷达由于仪器灵敏度的大幅提高,对降雪的综合探测能力最强,而KaMS和KaHS也具有特定的作用。此外,为了保证衰减订正的精度,和非降雪部分的衰减相比,需要主要提高降雪衰减尤其是混合相态湿雪的衰减订正精度。
Abstract:The Global Precipitation Measurement (GPM) mission core observatory was launched in February 2014, carrying the dual frequency precipitation radar (DPR). The DPR consists of two radars with microwave 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 analyzed. 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 important, especially for wet snow.
文章编号:     中图分类号:    文献标志码:
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
引用文本:
吴琼,仰美霖,窦芳丽,2017.GPM双频降水测量雷达对降雪的探测能力分析[J].气象,43(3):348-353.
WU Qiong,YANG Meilin,DOU Fangli,2017.Study of GPM Dual Frequency Radar in Detecting Snow[J].Meteor Mon,43(3):348-353.