摘要
黄色物质是海洋水色三组分之一。本文回顾了黄色物质定义的演变历史及其来源研究,描述了表征黄色物质光学特性的两个参数(吸收系数和比例系数S),概括了吸收系数研究的两种数学模型,即190—250nm区间的高斯模型和250—650nm区间的指数模型。高斯模型为化学方法研究黄色物质的分子结构提供了有力帮助,指数模型为光学特性和遥感应用提供了便利条件。本文提供了S值的三种数学模拟方法,结果表明带有背景参数的非线性回归方法确定S值可使平均值增加13%,相应的标准偏差降低72%。而且黄色物质的吸收系数同荧光线性关系很强。吸收系数不仅是黄色物质光学特性的表征,而且还是黄色物质遥感的基础。根据遥感器的不同特点总结了CZCS、SeaW iFS、MER IS、MOD IS、GLI等遥感器的黄色物质反演模型,展望了黄色物质遥感的未来。
CDOM is one of the three-components of ocean color. The research of CDOM has been made for several decades, this article reviews the development history of CDOMS definition and the investigation of sources. Absorption coefficient and S are two important parameters. Two models for absorption by CDOM are the Exponential model （250-650nm） and Gaussian model （190-250nm）. Gaussian model offers a deeper understanding of chemical interaction affecting CDOM molecular structure while Exponential model is acceptable for optical modeling and remote sensing applications. There are three methods to calculate S parameter, and non-linear regression with background parameter is the one . That provides the best fit and makes the average of S with 13% improvement and the standard deviation with 72% reduction. Furthermore there is a strong linear relation between the absorption coefficient and the fluorescence. Absorption coefficient is not only the optical properties of CDOM but the base of remote sensing. This article summarizes several kinds of retrieval equations such as those for SeaWiFS, MERIS, MODIS and GLI color sensors. The retrievals of color sensors have different characteristics and difficulties, so the remote sensing of CDOM is expected to be more exact in the future.
出处
《遥感学报》
EI
CSCD
北大核心
2006年第6期949-954,共6页
NATIONAL REMOTE SENSING BULLETIN
基金
国家863计划项目(编号:2001AA636020
2004AA604150)
908专项908-02-03-01资助
关键词
黄色物质
吸收系数
S
遥感模型
CDOM
absorption coefficient
S
remote sensing model
