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Volume 29 Issue 3

May  2012

Article Contents
Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2012 >  29(3): 611-622

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

  • 1.

    National Meteorological Information Center, Beijing 100081,State Key Laboratory of Severe Weather，Chinese Academy of Meteorological Sciences, Beijing 100081,State Key Laboratory of Severe Weather，Chinese Academy of Meteorological Sciences, Beijing 100081,Department of Atmospheric Science, University of Wyoming, Laramie, WY 82071, USA,State Key Laboratory of Severe Weather，Chinese Academy of Meteorological Sciences, Beijing 100081


doi: 10.1007/s00376-011-0112-x

  • 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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    • Manuscript History

    Manuscript received: 10 May 2012
    Manuscript revised: 10 May 2012
    通讯作者: 陈斌, bchen63@163.com
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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

    • 1. National Meteorological Information Center, Beijing 100081,State Key Laboratory of Severe Weather，Chinese Academy of Meteorological Sciences, Beijing 100081,State Key Laboratory of Severe Weather，Chinese Academy of Meteorological Sciences, Beijing 100081,Department of Atmospheric Science, University of Wyoming, Laramie, WY 82071, USA,State Key Laboratory of Severe Weather，Chinese Academy of Meteorological Sciences, Beijing 100081
    • Manuscript received: 2012-05-10
    • Manuscript revised: 2012-05-10

    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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