星载SSM/Ⅰ微波遥感渤海海冰的辐射特征分析
Monitoring regional sea ice of the Bohai Seaby SSM/I scattering indices
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摘要: 根据我国渤海区域星载微波遥感DMSPSSM/I1994～1996年的观察数据的研究,指出现有的星载微波遥感海冰的数据标定和验证TBI和OSI算法是不适用的.用22和85GHz的散射指数SI和19GHz的极化指数PI,讨论了渤海区域海冰的主要辐射特征,用矢量辐射传输理论数值模拟了SI、PI与海冰覆盖及其厚度变化的定量关系,用SI-PI图规划了渤海区域性海冰的识别方法,给出了渤海海冰的空间分布及其辐射特征的时间序列变化.Abstract: SSM/I data on the Bohai Sea of China from 1994 to 1996 have been studied.The sea ice algorithms of calibration/validation such as the brightness temperature index [AES/YORK TBI (Hollinger et al.,1992)] and ocean scattering index [OSI (Ferraro et al.,1996,The Bulletin of the American Meteorological Society,77 C5),891-905)] are not applicable to the detection of regional sea ice of mid-latitude Bohai Sea area.A method of the scattering index SI and polarization index PI to identify regional Bohai Sea ice is prerented.Numerical results of vector radiative transfer for a model a layer of sea ice over ocean simulate the relationship between SI/PI and sea ice depth,and others.It is employed to categorize the SI/PI indices for the detection of sea ice.
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Key words:
- SSM/I /
- Bohai Sea /
- scattering index
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Hollinger J P et al.DMSP SSM/I Calibration/Validation.The Naval Research Laboratory,Washington D.C.,Vol.2,Chap.10,1992 Ferraro R R et al.An eight year (1987-1994) time series of rainfall,clouds,water vapor,snow cover and sea ice derived from SSM/I measurements.The Bulletin of the American Meteorological Society,1996,77(5):891-905 Jin Yaqiu.Electromagnetic scattering modelling for quantitative remote sensing.World Scientific,Singapore,1994 金亚秋.电磁散射和热辐射的遥感理论.北京:科学出版社,1993 -
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