Forward and backward scattering properties of the melting layer of precipitation

Wei Zhang

doi:10.1117/12.2297735

1 October 1991 Forward and backward scattering properties of the melting layer of precipitation

Wei Zhang

Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 15760M (1991) https://doi.org/10.1117/12.2297735
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland

Abstract

The melting layer is assumed to be composed of spherical melting snow particles. Size distribution and average dielectric constant are used to characterize the melting snow particles. Both the size distribution and the dielectric constant are found to be connected with the physical and meteorological parameters. The cross sections, the albedo, and the effective reflectivity factor are computed in a frequency range of 1-100 GHz by using the Mie scattering for five size distributions and rain rates below 12.5 mm/h. Numerical results show that the difference between the melting layer attenuation and the attenuation of an equal path length in rain with the drop size distribution that results from the melting is at maximum around 25 GHz. It has also been seen that the peak of the effective reflectivity factor is disappeared in the melting layer when the frequency is higher than 70 GHz.

Citation Download Citation

Wei Zhang "Forward and backward scattering properties of the melting layer of precipitation", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15760M (1 October 1991); https://doi.org/10.1117/12.2297735

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