Polarimetric Radar Observation Operator for a Cloud Model with Spectral Microphysics

A. Ryzhkov Cooperative Institute for Mesoscale Meteorological Studies, University of Oklahoma, and National Severe Storms Laboratory, Norman, Oklahoma

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M. Pinsky Department of Atmospheric Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel

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A. Pokrovsky Department of Atmospheric Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel

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A. Khain Department of Atmospheric Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel

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Abstract

The radar observation operator for computation of polarimetric radar variables from the output of numerical cloud models is described in its most generic form. This operator is combined with the Hebrew University of Jerusalem cloud model with spectral microphysics. The model contains 7 classes of hydrometeors and each class is represented by size distribution functions in 43 size bins. The performance of the cloud model and radar observation operator has been evaluated for the case of a hailstorm in Oklahoma on 2 February 2009. It is shown that the retrieved fields of polarimetric radar variables at C and S microwave bands are generally consistent with results of observations. The relationship between microphysical and polarimetric signatures is illustrated.

Corresponding author address: Prof. Alexander Khain, Department of Atmospheric Sciences, The Hebrew University of Jerusalem, Givat Ram, 91904 Jerusalem, Israel. E-mail: khain@vms.huji.ac.il

Abstract

The radar observation operator for computation of polarimetric radar variables from the output of numerical cloud models is described in its most generic form. This operator is combined with the Hebrew University of Jerusalem cloud model with spectral microphysics. The model contains 7 classes of hydrometeors and each class is represented by size distribution functions in 43 size bins. The performance of the cloud model and radar observation operator has been evaluated for the case of a hailstorm in Oklahoma on 2 February 2009. It is shown that the retrieved fields of polarimetric radar variables at C and S microwave bands are generally consistent with results of observations. The relationship between microphysical and polarimetric signatures is illustrated.

Corresponding author address: Prof. Alexander Khain, Department of Atmospheric Sciences, The Hebrew University of Jerusalem, Givat Ram, 91904 Jerusalem, Israel. E-mail: khain@vms.huji.ac.il
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