基于卫星遥感资料的海洋表层流场反演与估算

Sea surface flow field retrieval and estimation based on satellite remote sensing data

为解决实际海流资料探测困难,难以大范围有效获取的问题,利用2000～2008年卫星高度计资料和QuikSCAT卫星遥感风场资料,开展了全球海表地转流和Ekman流的反演估算;针对不同纬度地区(赤道和赤道以外地区)地转效应和海洋运动差异,引入不同的运动学模型和反演估算方案,反演得到0.5°×0.5°的逐周全球表层流产品.对比分析表明,卫星资料反演估算的海洋表层流场能较为客观、准确地表现实际海表流场的基本特征,进而为海洋热量和海洋物质输送等研究提供了可用的海流数据信息.

For solving the difficult problem of large scale sea current observation and corresponding data acquiresition,by using the satellite altimeter data and QuikSCAT satellite remote sensing wind data range from 2000~2008,the global sea surface flow field including geostrophic flow and Ekman flow were retrieved and estimated.Considering the difference of geostrophic efficiency and oceanic movement for different latitude region（near equator and out of equator area）,two different dynamic equations and estimation scheme are introduced for dealing with the problem,A set weekly global sea surface flow field gridding data of 0.5°×0.5°are obtained.The experimental results show that the sea surface flow field estimated by satellite remote sensing data can objectively,exactly describe the basic characters of actual sea surface flow field,and provide the information supporting for such research as marine heat and factors transportation.