Depolarization of Microwaves by Hydrometeors in a Thunderstorm

Louis J. Battan Institute of Atmospheric Physics, The University of Arizona, Tucson

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John B. Theiss Institute of Atmospheric Physics, The University of Arizona, Tucson

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Abstract

Observations were made of the depolarization of 3-cm radar signals by hydrometeors in a thunderstorm. Observations of backscattered power and Doppler spectra were made at the same time. It was found that depolarizations ranged from about −12 to −24 db and were highly variable over distances of 500–1000 m. It is speculated that the large depolarizations were produced by wet ice particles resembling prolate spheroids.

Abstract

Observations were made of the depolarization of 3-cm radar signals by hydrometeors in a thunderstorm. Observations of backscattered power and Doppler spectra were made at the same time. It was found that depolarizations ranged from about −12 to −24 db and were highly variable over distances of 500–1000 m. It is speculated that the large depolarizations were produced by wet ice particles resembling prolate spheroids.

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