遥感海表温度（SST）现场验证新方法

项目名称： 遥感海表温度（SST）现场验证新方法

项目编号： No.41276182

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 陈楚群

作者单位： 中国科学院南海海洋研究所

项目金额： 92万元

中文摘要： 海表温度（SST）是海洋最重要的物理参数之一。SST在海气相互作用、全球气候变化、中尺度海洋过程、水团和海洋生态环境等研究、海洋数值模拟、近岸热污染评价等许多领域具有广泛应用价值。卫星热红外遥感技术经过数十年的发展，已经成为海表温度探测的重要手段。由于受大气层的干扰，卫星遥感数据需先经过大气校正，再利用反演算法估算SST。为了评价卫星遥感SST的反演精度，须进行现场验证。目前的验证方法是以现场单点观测（船或浮标观测）SST来验证遥感SST。卫星遥感获得的值是某像元区域内SST的平均值，与现场单点测量SST在空间上根本不匹配，无法达到验证的目的。本研究提出新的验证方法，以高精度热成像仪(温度分辨率为0.03K，探测误差1%)速获取与卫星同步的条带状SST资料来验证卫星遥感SST，极大地提高验证资料与卫星数据之间的空间匹配性，改进验证效果,进而对卫星热红外遥感SST反演算法进行评价。

中文关键词： 热红外遥感；皮温；皮温测量仪；现场验证；海面温度

英文摘要： Sea Surface Temperature (SST) is one of the important physical parameters of oceans. SST has been widely applied on many research fields, such as air-sea interaction, global weather change, mesoscale marine processes, water mass, marine ecological environment, ocean numeric model, detection of coastal thermal pollution. After several decades development, satellite remote sensing technique has become a dominant method for SST investigation. The satellite thermal data should be atmospherically corrected before applied to retrieve SST. In order to assess the accuracy of the remotely-sensed SST, in-situ SST data should be employed for validation. In present method of validation, the in-situ SST value from a point is used to validate the remotely-senseed SST which is the mean value of the pixel's area. The two SST values don't match spatially, and this kind validation don't make sense and cannot be convinced. In this research, a new method for validation was proposed. A thermal imager with 0.03K temperature resolution,1% error and 640*480 pixels was used to collect the in-situ SST, the average value of SST from the zone detected by the thermal imager will be used for validation. It will greatly enhence the spatial matching between the in-situ SST and remote sensing SST. It will certainly improve the validation. The

英文关键词： Thermal Remote Sensing；Skin Temperature；Buoyant Equiepment for Skin Temperature (BEST)；In-Situ Validation；Sea Surface Temperature (SST)