Sensitivity of TMI brightness temperatures to hydrometeor profiles in precipitating cloud

Wenying He; Hongbin Chen

doi:10.1117/12.619746

12 May 2005 Sensitivity of TMI brightness temperatures to hydrometeor profiles in precipitating cloud

Wenying He, Hongbin Chen

Proceedings Volume 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies; (2005) https://doi.org/10.1117/12.619746
Event: Optical Technologies for Atmospheric, Ocean, and Environmental Studies, 2004, Beijing, China

Abstract

A study on sensitivity of TMI brightness temperatures (Tbs) to the different vertical profiles of hydrometeor in precipitating cloud has been made by using a microwave radiative transfer model VDISORT. The different hydrometeor profiles are obtained from the simulations of precipitating convective cloud by means of a sophisticated meso-scale meteorological model MM5. The results show that at high frequency scattering effect of ice crystal and graupel are stronger than that of snow among the ice phase hydrometeors. When changing the ice phase water content the corresponding scattering coefficient has significant change however the extinction coefficient with obvious change is found only for changing ice crystal content. The analyses show that the Tbs at TMI high frequency calculated by the VDISORT model are very sensitive to the ice crystal concentration and much less sensitive to the snow and graupel concentrations. In addition comparison of measured and calculated TMI Tbs indicates that the MM5 might produce too much snow and less ice crystal content in the convective cloud for medium or heavy rainfall.

Citation Download Citation

Wenying He and Hongbin Chen "Sensitivity of TMI brightness temperatures to hydrometeor profiles in precipitating cloud", Proc. SPIE 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies, (12 May 2005); https://doi.org/10.1117/12.619746

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