南极地区SSM/I微波辐射计亮温时间序列分析  

Time series analysis of SSM/I microwave radiometer brightness temperature in Antarctica

作　　者：程晓[1] 张艳梅[2] 李震[1] 邵芸[1] 

机构地区：[1]中国科学院遥感应用研究所遥感科学国家重点实验室,北京100101 [2]中国地震局分析预报中心,北京100036

出　　处：《水科学进展》2005年第2期268-273,共6页Advances in Water Science

基　　金：中国科学院知识创新工程前沿领域资助项目(CX020006)~~

摘　　要：简单介绍了微波辐射的原理与应用现状,利用美国国防气象卫星计划DMSP F系列卫星携带的SSM/I辐射计南极地区极投影网格亮温数据进行了分析与处理。结合微波亮温等温线图和南极等高线图分析了南极地区亮温分布的特点。选取8个特征区域,对1992-2000年的日亮温数据进行了时间序列分析,分析了冰盖和冰架的亮温特性、季节和年度变化、短期波动等特征。研究表明南极大陆外围冰架和南极半岛地区的亮温呈增高趋势,而内陆冰盖地区则保持相对稳定;揭示了近年来随全球气候的变暖,南极冰架和南极半岛的融化正在加剧的趋势。The principles and the application of microwave radiometer are briefly introduced before the DMSP F-series satellite SSM/I data over the antarctic ice sheet are analyzed. The microwave brightness temperature (Tb) isoline, combined with the topographic contour line of ice sheet, interprets the characteristic of brightness temperature distribution in Antarctica. Time series (1992-2000), daily SSM/I Tb data from eight specific study regions are analyzed to understand the characteristic of Tb, seasonal and interannual changes and the sudden fluctuation over the different Antarctic ice caps and ice shelves. The research implies that the Tb value of the coastal ice shelves and the Antarctic Peninsula are increasing rapidly, while the inland ice sheet keeps stable. It is concluded that the surrounding ice shelves and Antarctic Peninsula are in increasing melting due to global warming.

关 键 词：SSM/I 微波辐射计 亮温 时间序列分析 冰盖 南极 

分 类 号：P343.63[天文地球—水文科学]