Retrieving microphysical properties and air motion of cirrus clouds based on the doppler moments method using cloud radar |
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| Authors: | ZHONG Lingzhi LIU Liping DENG Min ZHOU Xiuji |
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| Institution: | 1 National Meteorological Information Center,Beijing 100081 2 State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences,Beijing 100081 3 Department of Atmospheric Science,University of Wyoming,Laramie,WY 82071,USA |
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| Abstract: | 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. |
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| Keywords: | radar cloud Doppler moments microphysical properties |
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