3种不同卫星遥感海温产品在南海台风过程中的差异对比

Comparison of three satellite-derived SST products during typhoon processes in the South China Sea

针对3种不同卫星遥感海温产品(CRW SST、OSTIA SST和RSS SST)在不同台风影响期间对南海海域海表温度的表征能力进行了对比和评估。研究表明:3种卫星遥感产品均能捕捉到台风影响时海域海表温度的时空变化特征,CRW SST和OSTIA SST产品反映的南海海域海表温度时空特征变化的差异较小(均方根误差为0.22,相关系数为0.97),而RSS SST产品在台风过境后的局部海域显示出更大幅度的降温;CRW SST、OSTIA SST和RSS SST产品与浮标观测数据的均方根误差分别为1.27℃、1.32℃和1.00℃。结果表明,与其他两种卫星遥感海表温度产品相比,RSS SST产品更能反映台风过境期间南海海域海表温度的变化特征。

Three sets of satellite-derived SST products(CRW SST,OSTIA SST and RSS SST)are compared and evaluated during typhoon processes in the South China Sea.The results show that all three products can capture the spatial-temporal variation of SST in typhoon-affected sea area. The difference between the CRW and OSTIAproducts is small (root mean square error is 0.22 ℃, correlation coefficient is 0.97), and the local SST in the RSSproduct decreases significantly after typhoon process. The root mean square errors of the CRW, OSTIA and RSSproducts with respect to buoy data are 1.27 ℃, 1.32 ℃ and 1.00 ℃, respectively. In summary, the RSS productperforms best on SST variance during typhoon processes in the South China Sea.