Estimation of the Atmospheric Microwave Radiation Parameters in Tropical Cyclones from the AMSR2 Measurement Data

Abstract

In this study we use numerical modeling of the atmosphere-ocean system microwave radiation to estimate the atmospheric upwelling and downwelling radiation along with its optical thickness at the frequencies of the Advanced Scanning Microwave Radiometer 2 (AMSR2) using the values of the total atmospheric water vapor content (WVC) and total cloud liquid water content (CLW). Numerical modeling is based on the solution of the radiation transfer equation under approximations of microwave range. Calculations are done for the database of the atmospheric parameter profiles complemented with the model profiles of cloud liquid water content. The results of model calculations allow parameterizing the atmospheric radiation parameters as functions of WVC and CLW, which can be retrieved from the AMSR2 measurement data under various conditions including Tropical Cyclones (TCs). These atmospheric parameters can be further used to derive the oceanic response to high winds, associated with TCs, from the AMSR2 data.