Structure and Evolution of Southern Ocean Mesocyclones Using Multiple Satellite Systems

拟议的项目是一项研究，通过结合特殊传感器微波/成像仪(SSM/I)数据、TIROS业务垂直探测仪(TOVS)数据和基于卫星的雷达高度计数据来确定南大洋中气旋的气象特征，并与欧洲中期天气预报中心(ECMWF)的分析一起验证这些特征。这是印第安纳大学和华盛顿大学的联合项目。该项目将使用对风、大气湿度和热参数的卫星观测，这些参数将应用于以前通过卫星图像分析确定和编目的中气旋。分析中将包括对SSM/I算法在反演地表风速和湿度参数方面的性能的评估。对于1992年南半球冬季，将包括从欧洲遥感卫星(ERS-1)散射计获得的风向信息。这些中气旋发生的大尺度环境将通过与ECMWF天气分析中的诊断变量场进行比较来研究。该项目的预期成果是建立一个南大洋中气旋演变的概念和统计模式。这是将极地低压过程纳入业务数值分析和预报方案，并确定它们在大气一般环流中的作用的必要的第一步。

The proposed project is a study to determine the meteorological characteristics of Southern Ocean mesocyclones by combining Special Sensor Microwave/Imager (SSM/I) data, TIROS Operational Vertical Sounder (TOVS) data, and satellite-based radar altimeter data for selected case studies of mesoscale cyclone occurrences, and validating these characteristics with European Center for Medium-Range Weather Forecasts (ECMWF) analyses. It is a joint project of Indiana University and the University of Washington. The project will use retrieved satellite observations of winds, atmospheric moisture, and thermal parameters that will be applied to mesocyclones previously identified and catalogued from satellite image analyses. Included in the analyses will be an evaluation of the performance of SSM/I algorithms in retrieving surface winds and moisture parameters. For the austral winter of 1992 wind vector information obtained from the European Remote Sensing satellite (ERS-1) scatterometer will be included. The large-scale environment in which these mesocyclones occur will be studied by comparison with fields of diagnostic variables taken from the ECMWF synoptic analyses. The expected result of this project is the development of a conceptual and statistical model of Southern Ocean mesocyclone evolution. This is a necessary first step toward the inclusion of polar low processes in operational numerical analysis and prediction schemes, and the determination of their role in the general circulation of the atmosphere.