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主要目的是评估TMI(TRMM Microwave Imager)的海表温度产品在中国南海的适用性。主要方法是将TMI海温数据分别与实测Argo海温数据和MODIS海温数据相匹配,并计算产品准确度,分析影响因素。评估结果表明:匹配数据的线性关系显著,TMI海温数据与Argo海温数据相比,标准误差为0.66℃,平均偏差-0.08℃,与MODIS数据相比,标准误差为0.58℃,平均偏差0.15℃。评估结果略差于TMI产品在全球范围的准确度(0.57℃)。分析讨论得出,影响反演误差的主要因素有大气衰减、降雨衰减、海面风干扰等。
The main objective is to assess the applicability of TMI (TRMM Microwave Imager) sea surface temperature products in the South China Sea. The main method is to match the TMI sea temperature data with the measured Argo sea temperature data and the MODIS sea temperature data respectively, and calculate the product accuracy and analyze the influencing factors. The results showed that the matching data had significant linear relationship. The standard deviation of TMI sea temperature data was 0.66 ℃ and the average deviation was -0.08 ℃ compared with Argo sea temperature data. Compared with MODIS data, the standard error was 0.58 ℃ and the average deviation was 0.15 ℃. The results of the assessment are slightly worse than the global accuracy of TMI products (0.57 ° C). According to the analysis and discussion, the main factors affecting the inversion error are atmospheric attenuation, rainfall attenuation and surface wind disturbance.