13 October 2008 Seasonal variation of absorption spectral characteristics of CDOM and de-pigmented particles in East China Sea
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Abstract
The Colored Dissolved Organic Materials (CDOM) and the de-pigmented particles are the main components affecting the ocean colors in China coastal waters (which are commonly considered as the Case II waters). Understanding of their spectral characteristics is very important to develop the regional bio-optical algorithms for ocean color remote sensing. The coastal water in East China Sea (ECS) is influenced by the terrestrial materials especially the Yangtze River outflow, which has high dissolved organic and suspended materials concentration and complex particles composition. In this paper, we analyze the in situ datasets collected in four seasons between 2006 and 2007 in ECS, and get the spectral absorption models of CDOM and de-pigmented particles. The distributions of absorption coefficients of CDOM ( ) and de-pigmented particles ( ) show a decreasing trend from coastal water to the off-shore waters, which is influenced mainly by the Yangtze River outflow and coastal currents with remarkable seasonal variation in ESC. The maxima of adp CDOM a dp a dp is very high and even up to 90 m-1 level in estuary waters that it will apparently influence the retrieval of CDOM. The frequency of slops of the exponential spectrum of de-pigmented particles obeys the Gaussian distribution and it has good relationships with the absorption coefficient especially in the near-shore areas. The optical characteristics in ECS will give feasible reference to the further development of regional bio-optical algorithms.
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Hui Lei, Hui Lei, Yan Bai, Yan Bai, Haiqing Huang, Haiqing Huang, Delu Pan, Delu Pan, Zhihua Mao, Zhihua Mao, "Seasonal variation of absorption spectral characteristics of CDOM and de-pigmented particles in East China Sea", Proc. SPIE 7105, Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2008, 71050R (13 October 2008); doi: 10.1117/12.799707; https://doi.org/10.1117/12.799707
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