The proportions and variations of the light absorption coefficients of major ocean color components in the East China Sea  

作　　者：LEI Hui PAN Delu BAI Yan TAO Bangyi SUN Jun ZHANG Lin ZHANG Xuan 

机构地区：[1]Zhejiang University,Hangzhou 310012,China [2]State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,State Oceanic Administration,Hangzhou 310012,China [3]Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China [4]Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China

出　　处：《Acta Oceanologica Sinica》2012年第2期45-61,共17页海洋学报（英文版）

基　　金：The National Basic Research Program ("973" Program) of China under contract No.2009CB421202;the National Natural Science Foundation of China under contract Nos 40976110 and 40706061;the National High Technology Research and Development Program ("863" Program) of China under contract No.2008AA09Z104

摘　　要：The East China Sea （ECS）, one of the largest continental seas, has dynamic hydrology and complex optical characteristics that make ocean color remote-sensing retrieval difficult. The distributions and proportions of the light absorption coefficients of major ocean color components based on two large-scale investigations in the ECS are presented, showing these features in typical summer and winter seasons. The absorption coefficient aCDOM, aNAp and aphy of colored dissolved organic matter, non-algal particle, and pigment of phytoplankton show a decreasing trend from the coast to the outer shelf. According to the aeDOM distribution at 440 nm, the Changjiang River plume shows an abnormal southeastward transport. An extremely high aNaP value patch at 440 nm is present in the middle coast. The chlorophyll-a-specific phytoplankton pigment absorption （a^hy） is much higher in winter than in summer, which may cause serious underestimated results when applying the averaged aphy into remote-sensing algorithms for chlorophyll concentration retrieval. The importance of phytoplankton size was evident in outer shelf waters. The absorption of aCDOM （440） is a dominant component accounting for over half of the total seawater absorption in summer. The aNAP（440） accounts for 64% of the absorption of the ECS coastal area in winter.The East China Sea （ECS）, one of the largest continental seas, has dynamic hydrology and complex optical characteristics that make ocean color remote-sensing retrieval difficult. The distributions and proportions of the light absorption coefficients of major ocean color components based on two large-scale investigations in the ECS are presented, showing these features in typical summer and winter seasons. The absorption coefficient aCDOM, aNAp and aphy of colored dissolved organic matter, non-algal particle, and pigment of phytoplankton show a decreasing trend from the coast to the outer shelf. According to the aeDOM distribution at 440 nm, the Changjiang River plume shows an abnormal southeastward transport. An extremely high aNaP value patch at 440 nm is present in the middle coast. The chlorophyll-a-specific phytoplankton pigment absorption （a^hy） is much higher in winter than in summer, which may cause serious underestimated results when applying the averaged aphy into remote-sensing algorithms for chlorophyll concentration retrieval. The importance of phytoplankton size was evident in outer shelf waters. The absorption of aCDOM （440） is a dominant component accounting for over half of the total seawater absorption in summer. The aNAP（440） accounts for 64% of the absorption of the ECS coastal area in winter.

关 键 词：absorption coefficient East China Sea colored dissolved organic matter non-algal particle 

分 类 号：P715.6[天文地球—海洋科学]