AMSR-E的C/X双波段垂直极化亮温反演海面盐度

Retrieveof Sea Surface Salinity by AMSR-E C/X Dual Band Vertical Polarization Brightness Temperature

利用星载传感器观测数据反演的大气海洋参数进行综合研究是物理海洋学等海洋学科获取信息的重要手段。特别是全球尺度精细化的海面盐度信息,只有通过卫星观测才能有效获得。星载微波辐射计能够获取低频波段的亮温数据,具有一定的海面盐度反演能力。使用AMSR-E的C/X双波段垂直极化亮温数据和AMSR-E的L2b产品反演亚马孙河口海区和中国黄海东海海区的海面盐度,并将反演结果与WOA09气候态盐度数据进行比较。实验表明:使用星载微波辐射计的C/X双波段垂直极化亮温能够有效获得河口区域海面盐度的变化趋势,反演精度约为1.5psu,具有一定的应用价值,为将来我国盐度卫星的数据处理提供一定的帮助。

The comprehensive study of oceanic parameters retrieved from the data observed by spaceborne sensors is a major method to obtain information in the field of physical oceanography.Especially the global scale of sea surface salinity in high resolution,only spaceborne sensors can be effectively used to retrieve.Spaceborne microwave radiometer can obtain the brightness temperature data on low frequency bands which have certain ability to retrieve sea surface salinity.Using AMSR-E C/X dual band vertically polarized brightness temperature data and AMSR-E L2 bdata as auxiliary to retrieve sea surface salinity in the Amazon River estuary and the Yellow Sea East China Sea（especially Yangtze River estuary）.The experiments compare retrieval results with woa09 climatological data and indicate that using the C/X dual band vertical brightness temperature can effectively obtain the trend changes of the sea surface salinity in the estuary area.The accuracy of retrieval results is about 1.5psu,which has a certain application value.The experiment could provide some helpful information for China salinity satellite data processing of the Salinity Satellite Mission in China in future.