多源星载辐射计SST数据对比分析

基于2018年4种红外辐射计(MODIS-Aqua,MODIS-Terra,VIIRS和AVHRR)的SST数据和3种微波辐射计(GMI,WindSat和AMSR2)的SST数据,分析了7种星载辐射计SST数据的全球覆盖情况,利用Argo数据对7种辐射计SST数据进行了真实性检验,并开展了微波产品、红外产品和Argo的交叉比对分析。结果表明:VIIRS SST数据的覆盖率、有效覆盖天数均高于MODIS-Aqua、MODIS-Terra和AVHRR;AMSR2微波辐射计SST数据的覆盖率和有效覆盖天数均高于GMI和WindSat;4种红外辐射计SST数据与Argo浮标数据的平均偏差在-0.27~0℃,均方根误差小于0.76℃,其中VIIRS数据质量最好;3种微波辐射计SST数据与Argo浮标数据的平均偏差在-0.04~0.22℃,均方根误差小于0.88℃,其中AMSR2绝对偏差、标准偏差和均方根误差均小于其他2个微波辐射计数据。AMSR2和VIIRS的SST数据交叉对比发现,AMSR2与APDRC Argo、VIIRS与APDRC Argo的平均偏差分别小于0.15和-0.20℃,标准偏差分别小于0.52和0.60℃;AMSR2与VIIRS平均偏差在-0.23~-0.10℃,标准偏差小于0.41℃,两者具有较高的一致性。

Comparation Analysis of SST Data From Multi-source Satellite Radiometer

Based on the SST data from four satellite infrared radiometers (MODIS-Aqua, MODIS-Terra, VIIRS, AVHRR) and three microwave radiometers (GMI, WindSat, AMSR2) in 2018, the global ocean spatio temporal coverage of these space borne radiometer SST data was analyzed, followed by the comparison between satellite-derived (microwave and infrared) SST and Argo in situ measured ones. The results show that, the higher SST spatio-temporal coverage is achieved by VIIRS compared to MODIS-Aqua, MODIS-Terra and AVHRR. For the microwave radiometer observation, AMSR2 has the higher spatio temporal coverage than GMI and WindSat. The average SST deviation between the four infrared radiometers and the Argo buoy measurement is between -0.27-0 ^°C, and the root mean square error (RMSE) is less than 0.76 ^°C; VIIRS SST exhibits the best quality. The average deviation between the three microwave radiometers and the Argo measurement ranges from -0.04 ^°C to 0.22 ^°C, and the RMSE is less than 0.88 ^°C. The absolute deviation, standard deviation and RMSE of AMSR2 SST are lower than those of the other two microwave radiometers. The average (standard) deviation of AMSR2 and VIIRS SST with respect to the Argo measurement is less than 0.15 ^°C (0.52 ^°C) and -0.20 ^°C (0.60 ^°C), respectively. High consistency between AMSR2 and VIIRS SST is found, indicated by the average deviation ranging from -0.23 ^°C to -0.10 ^°C and the standard deviation of less than 0.41 ^°C.