比较了2000年夏季邻近珠江口的南海东北部海区海洋水色传感器SeaWiFS遥感与走航叶绿素a(Chla)的分布 ,着重对比在运用Ruddick的浑浊水体大气校正方法的条件下OC2,OC4和OCTSC的3种标准经验算法反演的SeaWiFS遥感Chla与实测Chla偏离的相对程度。结果表明 ,3种产品都能够反映Chla从近岸向远岸降低的空间分布特征 ,但从近岸到远岸划分3个子区域分别对遥感与走航Chla求均值比较的结果表明 ,OC4产品偏离实测Chla分布的程度明显小于其他2种产品。此外3种产品的Chla频率分布差异显著。这一结果可以为选择适用于该海域海洋环境变动研究的SeaWiFSChla标准产品提供参考This study compared SeaWiFS Chla derived from three standard empirical algorithms with ship measured Chla in the northeastern South China Sea in summer,2000.OC4,OC2and OCTSC were applied respectively to retrieve remote sensing Chla products after Ruddick atmospheric correction was done.By comparing the bias of average remote sensing Chla relative to average real Chla at three portions distributing from inshore to offshore regions,it was found that OC4product demonstrated the best among three products,with relative errors10%～32%lower than those produced by OC2and OCTSC for the coastal water adjacent to the estuarine water where Chla concentration was high and the other inˉterference matter such as color dissolved organic matter and suspended sediment were rich.OCTSC product appeared the worst in this region.It was thus suggested that SeaWiFS Chla retrieved by adopting Ruddick atmospheric correction and OC4standard empirical algorithm might be applicable to the investigation of marine environmental variability in the northeast South China Sea.国家863青年基金“近岸纳污海域高光谱现场探测系统”(2002AA639540) ;; 国家杰出青年基金“珠江三角洲及其邻近的南海北部海域中碳的生物地球化学循环研究”项目(49825111
