MONITORING REGIONAL SEA-ICE OF CHINA BOHAI SEA BY SSM I SCATTERING INDEXES/

The Specific Sensor Microwave/Imager (SSM/I) data over China's Bohai S ea from 1994 to 1996 has been studied. Some empirical algorithms of da ta calibration/validation for sea ice, such as the method of the Atmos pheric Environment Science/York University temperature brightness inde x (AES/YORK TBI) and ocean scattering index (OSI), are not well applic able to detection of regional sea ice such as the midlatitude Bohai Se a area. This paper presents a method of the scattering index (SI) and polarization index (PI) to identify regional Bohai Sea ice. Numerical results of vector radiative transfer for a model of a layer of sea ice over ocean simulate the relationship between SI's/PI's and sea ice de pth and other variations. It is employed to categorize the graph of SI 's/PI's for detection of sea ice.