Ice water content and reflectivity retrieval from cirrus clouds using millimeter-wave radar and in-situ ice crystal airborne data.

摘要

Data collected in March 2000 during the Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Cloud Intensive operational period (Cloud IOP) at the Cloud and Radiation Testbed (CART) site in Lamont, Oklahoma was used to retrieve the equivalent reflectivity factor (Ze) and ice water content (IWC) of cirrus clouds. It was found that the effect of the shape was negligible at 33 GHz, but was significant at 95 GHz. Also, ice water content (IWC) was calculated for both sensors using variable density models for the ice crystals. I WC-Ze relationships for the three densities used in this investigation were obtained at 33 GHz. The IWC-Z e relationship obtained using Brown and Francis [1995] density, resulted the most reliable (the shape, and the low variability in the discrete values). (Abstract shortened by UMI.)