Evaluation and Preprocess of Chinese Fengyun-3A Sea Surface Temperature Experimental Product for Data Assimilation  

作　　者：ZHOU Wei CHENG Yan-Jie WANG Su-Juan WANG Zai-Zhi 

机构地区：[1]Beijing Climate Center,National Climate Center,China Meteorological Administration (CMA) [2]National Satellite Meteorological Center,CMA

出　　处：《Atmospheric and Oceanic Science Letters》2013年第3期128-132,共5页大气和海洋科学快报（英文版）

基　　金：supported by the National Basic Research Program of China(973 Program,Grant Nos.2010CB951902 and 2011CB403505);the National Key Technologies R&D Program of China(Grant No.2009BAC51B03);the National Natural Science Foundation of China(Grant No.41106003)

摘　　要：Validated satellite-derived sea surface temperatures (SSTs) are widely used for climate monitoring and ocean data assimilation systems. In this study, the Fengyun-3A (FY-3A) SST experimental product is evaluated using Advanced Very High Resolution Radiometer (AVHRR)-merged and in situ SSTs. A comparison of AVHRR-merged SSTs reveals a negative bias of more than 2K in FY-3A SSTs in most of the tropical Pacific and low-latitude Indian and Atlantic Oceans. The error variance of FY-3A SSTs is estimated using three-way error analysis. FY-3A SSTs show regional error variance in global oceans with a maximum error variance of 2.2 K in the Pacific Ocean. In addition, a significant seasonal variation of error variance is present in FY-3A SSTs, which indicates that the quality of FY-3A SST could be improved by adjusting the parameters in the SST retrieval algorithm and by applying regional and seasonal algorithms, particularly in key areas such as the tropical Pacific Ocean. An objective analysis method is used to merge FY-3A SSTs with the drifter buoy data. The errors of FY-3A SSTs are decreased to-0.45K comparing with SST observations from GTSPP.Validated satellite-derived sea surface tem- peratures （SSTs） are widely used for climate monitoring and ocean data assimilation systems. In this study, the Fengyun-3A （FY-3A） SST experimental product is evalu- ated using Advanced Very High Resolution Radiometer （AVHRR）-merged and in situ SSTs. A comparison of AVHRR-merged SSTs reveals a negative bias of more than 2 K in FY-3A SSTs in most of the tropical Pacific and low-latitude Indian and Atlantic Oceans. The error variance of FY-3A SSTs is estimated using three-way er- ror analysis. FY-3A SSTs show regional error variance in global oceans with a maximum error variance of 2.2 K in the Pacific Ocean. In addition, a significant seasonal variation of error variance is present in FY-3A SSTs, which indicates that the quality of FY-3A SST could be improved by adjusting the parameters in the SST retrieval algorithm and by applying regional and seasonal algo- rithms, particularly in key areas such as the tropical Pa- cific Ocean. An objective analysis method is used to merge FY-3A SSTs with the drifter buoy data. The errors of FY-3A SSTs are decreased to -0.45K comparing with SST observations from GTSPP.

关 键 词：FY-3A SST satellite SST evaluation AVHRR-merged SST error analysis 

分 类 号：P732.1[天文地球—海洋科学]