Retrieving Microphysical Properties and Air Motion of Cirrus Clouds Based on the Doppler Moments Method Using Cloud Radar  

作　　者：仲凌志 刘黎平 邓敏 周秀骥 

机构地区：[1]National Meteorological Information Center [2]State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences [3]Department of Atmospheric Science,University of Wyoming

出　　处：《Advances in Atmospheric Sciences》2012年第3期611-622,共12页大气科学进展（英文版）

基　　金：the National Natural Science Foundation of China (Grant No. 40975014);the basic scientific and operational project "observation and retrieval of microphysical parameters with multiple wavelength radars"

摘　　要：Radar parameters including radar reflectivity, Doppler velocity, and Doppler spectrum width were obtained from Doppler spectrum moments. The Doppler spectrum moment is the convolution of both the particle spectrum and the mean air vertical motion. Unlike strong precipitation, the motion of particles in cirrus clouds is quite close to the air motion around them. In this study, a method of Doppler moments was developed and used to retrieve cirrus cloud microphysical properties such as the mean air vertical velocity, mass-weighted diameter, effective particle size, and ice content. Ice content values were retrieved using both the Doppler spectrum method and classic Z-IWC （radar reflectivity-ice water content） relationships; however, the former is a more reasonable method.Radar parameters including radar reflectivity, Doppler velocity, and Doppler spectrum width were obtained from Doppler spectrum moments. The Doppler spectrum moment is the convolution of both the particle spectrum and the mean air vertical motion. Unlike strong precipitation, the motion of particles in cirrus clouds is quite close to the air motion around them. In this study, a method of Doppler moments was developed and used to retrieve cirrus cloud microphysical properties such as the mean air vertical velocity, mass-weighted diameter, effective particle size, and ice content. Ice content values were retrieved using both the Doppler spectrum method and classic Z-IWC （radar reflectivity-ice water content） relationships; however, the former is a more reasonable method.

关 键 词：RADAR CLOUD Doppler moments microphysical properties 

分 类 号：P412.15[天文地球—大气科学及气象学]