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A new approach to modeling ice crystal aggregates and its implications for radar remote sensing

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3 Author(s)
Giovanni Botta ; Department of Meteorology at The Pennsylvania State University, USA ; Kültegin Aydin ; Johannes Verlinde

Backscattering cross sections of model ice crystal aggregates are computed at 35.6 GHz using the generalized multiparticle Mie (GMM) method and compared against a commonly used equivalent dielectric model (also referred to as the “soft sphere” or the “bulk” model). It is shown that the bulk model underestimates the backscattering cross sections by 7 to 20 dB over aggregate sizes from 3 to 19 mm. This raises concerns about using bulk models for the interpretation of millimeter wave radar measurements of ice clouds and snow.

Published in:

Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International

Date of Conference:

25-30 July 2010