摘要
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,将其分别与TAO观测和SCUD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。
The ocean surface currents were 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° x 0.5° ocean surface current product was reconstructed during the period 2000-2008 by combining the geostrophic current estimated from sea surface height with the Ekman current estimated from the wind stress. Particularly, weight function was introduced in calculating the Ekman current to eliminate the discontinuity near the 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. At last, the result showed that this innovatory method was effective.
出处
《海洋通报》
CAS
CSCD
北大核心
2012年第1期1-8,共8页
Marine Science Bulletin
基金
国家自然科学基金(41075045)
