水体中有色可溶性有机物遥感在海岸带调查中的应用——以密西西比—阿查法拉亚海湾水域为例

REMOTE SENSING STUDY OF CHROMOPHORIC DISSOLVED ORGANIC MATTER IN AQUATIC ECOSYSTEMS AND ITS APPLICATION TO COASTAL SURVEY——A CASE FROM MISSISSIPPI-ATCHAFALAYA RIVER SYSTEM

有色可溶性有机物(CDOM)是溶解性有机物的重要组成部分,其光学行为和生物地球化学循环对水体生态系统有明显影响,是海岸带调查的重要指标。通过遥感方法监测水体CDOM的变化是海岸带环境动态监测的重要方法,介绍了CDOM遥感监测的原理及常用的遥感数据,并通过墨西哥湾西北部的密西西比—阿查法拉亚海湾水域系统进行CDOM光学性质季节性遥感调查实例,揭示了在海岸带地区,不同的季节、不同的水样深度条件下,CDOM的光学性质表现出的不同特性,其变化与盐度、溶解氧等的含量密切相关,是海岸带调查研究的重点。

Chromophoric dissolved organic matter （CDOM） is one of the important dissolved organic matters in coastal waters. As we know, the optical behavior and biogeochemical cycle of CDOM are closely related to aquatic ecosystem, and the optical properties of CDOM change with seasons and wa- ter depth in coastal waters,clue to the changes in salinity and DO concentration. It,therefore,could be used as an important indicator in coastal survey, and remote sensing is suggested as an important method for monitoring environmental changes in CDOM in sea water. This paper introduced the principle of the method and the remote sensing data commonly used for the purpose,taking the seasonal remote sensing survey of the optical properties of CDOM in Mississippi Atchafalaya river system as an example, and discussed their application potential in coastal researches.