大洋河河口海域有色溶解性有机物的光学特性及遥感反演模型

有色溶解性有机物(CDOM)在河口混合过程中近似呈保守行为,可作为水团运动的示踪剂.基于2009年5月6日大洋河河口海域水体调查的实测数据,对该区域CDOM光学特性及遥感反演模型进行了研究,结果表明:研究区域CDOM主要来自河流输入,成分相对较稳定,属于典型的近岸二类水体区域;波长275～295 nm的光谱斜率和波长4...

The optical properties and remote sensing retrieval model of chromophoric dissolved organic matter in the Dayang Estuary

Chromophoric dissolved organic matter (CDOM) shows an approximate conservative behavior during estuary mixing, and can be used as the tracer of water mass movement.On the basis of the waters measured data in the Dayang Estuary on 6 May 2009, the optical properties and remote sensing retrieval model of CDOM were analyzed.The results show that CDOM mainly comes from terrigenous input in the study area, and its composition is relatively stable, so the study area belongs coastal Case II water region; a spectral slope S_g(275~295) and an absorption coefficient a_g(400) all have indicative effect on the relative size of the CDOM molecular mass; CDOM exhibits a conservative mixing behavior, with the injection of freshwater in rivers, diffusion, water salinity increases, the high concentration CDOM from the river is diluted, so CDOM concentration decreases, meanwhile the high percentage of macromolecular humic acid contained the river water reduces, correspondingly, the high percentage of small molecular fulvic acid contained the ocean increases, so the S_g and M values increase; the performance of the model based on R_rs(531)/R_rs(551) sensitive band is the best, the coefficient of determination up to 0.84, so this model can be used as remote sensing retrieval model of CDOM in the Dayang Estuary.