二类水体水色遥感的主要进展与发展前景  

PROGRESS AND PROSPECT OF OCEAN COLOR REMOTE SENSING IN CASE 2 WATERS

作　　者：任敬萍[1] 赵进平[2] 

机构地区：[1]中国科学院海洋研究所,山东青岛266071 [2]国家海洋局第二海洋研究所,浙江杭州310012

出　　处：《地球科学进展》2002年第3期363-371,共9页Advances in Earth Science

基　　金：山东省青年基金项目"SeaWiFS资料监测海岸带生态环境的应用研究"(编号 :Q98E0 113 8);中国科学院知识创新工程项目"近海海洋动力过程的遥感分析与应用研究"(编号 :KZCX2 2 0 2 )资助

摘　　要：Ⅱ类水体水色遥感是海洋水色遥感的难点和热点。针对Ⅱ类水体的光谱特性和海洋现象的特点 ,综述了水色卫星传感器在光谱波段配置、辐射探测性能和时空分辨率等方面的设计要求与技术进步。从水色遥感资料反演的两大关键技术———大气校正和生物光学算法两个方面 ,概述了Ⅱ类水体水色反演算法的研究现状和发展方向。根据我国近海的水体特点 。case 1 waters and case 2 waters are different water types defined by optical characteristics. case 1 water is clear, open ocean water, and case 2 is generally coastal, higher productivity, turbid water. Ocean color in case 2 waters is influenced by three major components of the water, namely phytoplankton pigment, suspended sediment and yellow substance. case 2 waters are more complex than case 1 waters in their composition and optical properties. To date, remote sensing of ocean color has focused largely on case 1 waters. It has been demonstrated that the standard algorithms in use today for chlorophyll retrieval from satellite data work well in case 1 waters, but they often break down in case 2 waters. With the advent of the new sensors and the emergence of the new algorithm in parallel, better interpretation of ocean color in case 2 waters are under intensive investigation. Technical requirements for ocean color measurements are reviewed first according to the spectral signatures and ocean processes in case 2 waters. The minimum requirements for ocean color sensors designed for case 1 applications are introduced. Ocean color sensors for case 2 waters must meet all the requirements for case 1 waters, as well as the special requirements for case 2 waters. ①In the visible domain, additional spectral channels are required for the measurement of chlorophyll fluorescence, suspended sediment, yellow substance and shallow bottom reflectance. In the near infrared region, one or more additional channels are required for atmospheric correction over shallow or turbid coastal waters because of the non zero water leaving radiance beyond 700 nm. ②Because the range of remote sensing reflectance in case 2 waters is larger than in case 1 waters, the sensitivity and signal to noise ratio must be increased. In addition, ocean color sensors must not saturate over clouds or the coast, so very high dynamic range is required. ③More temporal resolution and more spatial resolution are required to monitor the dynamical

关 键 词：水色遥感 Ⅱ类水体 反演算法 

分 类 号：P71[天文地球—海洋科学]