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Absorption and scattering of microwaves by falling snow |
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| Authors: | Petr Chylek Julius Zhan R. G. Pinnich |
| Affiliation: | (1) Atmospheric Science Program Departments of Physics and Oceanography, Dalhousie University, B3H 3J5 Halifax, Nova Scotia, Canada;(2) Department of Physics, University of Oklahoma, 73039 Norman, Oklahoma;(3) Atmospheric Science Laboratory, White Sands Missile Range, 88002, New Mexico;(4) Department of Atmospheric Science, State University of New York, Albany, New York |
| Abstract: | Fluffy snow flakes are modeled by a polydispersion of hexagonal plates for which analytical expressions for absorption and scattering coefficients are derived using the anomalous diffraction approximation. Comparison with results obtained using the dipole superposition method demonstrates that the accuracy of the anomalous diffraction approximation is within 15%. We also show that replacement of hexagonal plates by equal volume or equal surface area spheres leads to large errors in both scattering and extinction cross sections. |
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