Climatologic comparison of HadISST1 and TMI sea surface temperature datasets  

作　　者：WANG Yu LIU Peng LI TianYi FU YunFei 

机构地区：[1]Laboratory of Atmospheric Observation and Climatological Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China

出　　处：《Science China Earth Sciences》2011年第8期1238-1247,共10页中国科学（地球科学英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2010CB428601);the Special Funds for Public Welfare of China(Grant Nos.GYHY200906002,GYHY200906003);the Science and Technology Special Basic Research of the Ministry of Science and Technology(Grant No.2007FY110700);the Knowledge Innovation Program of the Chinese Academy of Sciences(Grant Nos.KZCX2-YW-Q11-04,KZCX2-EWQN507,KJCX2-YW-N25);the National Natural Science Foundation of China(Grant Nos.40730950,40805008)

摘　　要：Two monthly datasets of sea surface temperature (SST),TMI SST retrieved from satellite observations by Remote Sensing System and HadISST1 (Hadley Centre Sea-ice and Sea-surface Temperature Data Set Version 1) derived from in situ measurements by Hadley Centre,were compared on climatologic multiple time scales over tropical and subtropical areas from 1998 to 2006.Results indicate that there is a good consistency in the horizontal global distribution,with 1.0° resolution on multi-year and multi-season mean scales between the two datasets,and also in the time series of global mean SST anomalies.However,there are still some significant differences between the datasets.Generally,TMI SST is relatively higher than HadISST1.In addition,the differences between the two datasets show not only remarkable regionality,but also distinct seasonal variations.Moreover,the maximum departure occurs in summer,while theminimum takes place in autumn.For all seasons,over 30% of the regions in the Tropical and Subtropical areas have a difference of more than 0.3°C.EOF analysis of the SST anomaly field also shows that there are differences between the two datasets,where HadISST1 has more significant statistical characteristics than TMI SST.On the other hand,results show that the difference between the two datasets is related to the vertical structure of ocean temperatures,as well as other simultaneously retrieved parameters in TMI products,such as wind speed,water vapor,liquid cloud water and rain rates.In addition,large biases between HadISST1 and TMI SST are found in coastal regions,where TMI SST cannot be accurately retrieved because of polluted microwave signals.Two monthly datasets of sea surface temperature （SST）,TMI SST retrieved from satellite observations by Remote Sensing System and HadISST1 （Hadley Centre Sea-ice and Sea-surface Temperature Data Set Version 1） derived from in situ measurements by Hadley Centre,were compared on climatologic multiple time scales over tropical and subtropical areas from 1998 to 2006.Results indicate that there is a good consistency in the horizontal global distribution,with 1.0° resolution on multi-year and multi-season mean scales between the two datasets,and also in the time series of global mean SST anomalies.However,there are still some significant differences between the datasets.Generally,TMI SST is relatively higher than HadISST1.In addition,the differences between the two datasets show not only remarkable regionality,but also distinct seasonal variations.Moreover,the maximum departure occurs in summer,while theminimum takes place in autumn.For all seasons,over 30% of the regions in the Tropical and Subtropical areas have a difference of more than 0.3°C.EOF analysis of the SST anomaly field also shows that there are differences between the two datasets,where HadISST1 has more significant statistical characteristics than TMI SST.On the other hand,results show that the difference between the two datasets is related to the vertical structure of ocean temperatures,as well as other simultaneously retrieved parameters in TMI products,such as wind speed,water vapor,liquid cloud water and rain rates.In addition,large biases between HadISST1 and TMI SST are found in coastal regions,where TMI SST cannot be accurately retrieved because of polluted microwave signals.

关 键 词：sea surface temperature HadISST1 TMI EOF analysis 

分 类 号：P731.11[天文地球—海洋科学] TP311.13[自动化与计算机技术—计算机软件与理论]