基于卫星遥感数据的全球表层流场反演重构

利用2000~2008年的卫星高度计资料和QuikSCAT风场资料，反演了全球的海表的地转流和Ekman流，将两者合成后生成了0．5°×0．5°的逐周全球表层流产品。在计算Ekman流的时候，引入了权重函数，改进了Lagerloef方法中Ekman流在25°S和25°N上的不连续问题。分析表明：卫星资料反演的流产品能够反映出海表流场的特征，将其分别于TAO观测和SGUD流产品进行定量化的比较显示，所得流产品具有较高的反演精度和可信度，说明改进的方法是有效的。

Ocean surface currents retrieval based on the satellite remote sensing data

The ocean surface currents are reconstructed from the satellite remote sensing data containing altimeter-derived sea surface height and QuikSCAT satellite-derived wind data. Based on the method proposed by Lagerloef, a global weekly 0.5°×0.5°ocean surface current product was obtained over the period 2000 - 2008 by combining the geostrophic currents estimated from sea surface height with Ekman current estimated from the wind stress. Particularly, weight functions were introduced when calculating the Ekman currents to eliminate the discontinuity near 25°S and 25°N. These satellite-derived currents have been compared with TAO current meter and the SCUD product, respectively. The comparison showed that satellite-derived currents not only could capture the characteristics of ocean surface currents but also had high accuracy and reliability. The result showed that this innovatory method was effective.