부산대학교 도서관

Numerical simulation of brightness temperatures of the Advanced Microwave Scanning Radiometer 2 (AMSR2) over the sea ice-open ocean-atmosphere system is fulfilled for non-precipitating conditions using a database of atmospheric meteorological parameter profiles, model profiles of cloud liquid water and published experimental data for sea ice emissivities. The results of numerical experiment show that polarization difference (PD) at high frequency channels can help to discriminate between the sea ice and sea water. At that high wind speeds and optically thick atmospheres lead to misinterpretation of sea ice basing on the only PD values. This complicates sea ice concentration retrievals under bad weather conditions, associated with high winds and atmospheres with high values of total atmospheric absorption. In this study we use numerical simulation results to define the weather limits of applicability of the current sea ice concentration algorithms based on satellite passive microwave PD measurements.