运用Sea WiFS遥感数据探测中国东部沿海悬浮泥沙浓度的研究

Remote sensing of suspended sediments in China east coastal waters from SeaWiFS data

本文利用海洋水色卫星SeaStar/SeaWiFS数据,建立了中国东部沿海悬浮泥沙浓度定量模式。首先介绍了SeaWiFS海洋水色遥感探测器所具有的优点。其次,针对NASA开发的处理SeaWiFS数据的软件(SeaDAS)运用于中国东部沿海这一高浓度泥沙含量区域所出现的问题,提出了新的大气校正方法,并运用于计算中国东部沿海悬浮泥沙浓度。通过与SeaDAS已有方法进行比较,认为根据文中所提出的新的大气校正方法计算所得的中国东部沿海悬浮泥沙浓度分布层次清晰,结果也较为合理。

With the development of remote sensing technique in the last 2 decades, space sensors can be applied to detect suspended material by measuring the spectra of water-leaving radiance. The data of SeaWiFS （Sea-Viewing Wide Field-of-View Sensor）, installed on SeaStar, has been used to obtain SSC （ suspended .sediment concentration） of more complex and turbid coastal waters in China. First, the major advantages of SeaWiFS are introduced. Second, in view of the problems of the SeaDAS algorithm applying in China＇s coastal waters, the new atmospheric correction algorithms are discussed and developed. Then SSC of China east coastal waters is obtained by using new algorithms. Finally, the advantages of the new algorithms are presented by the compar ison of the results from the different algorithms.