%0 Journal Article %T 基于三维荧光和平行因子分析法的太湖水体CDOM组分光学特征 %T Components optical property of CDOM in Lake Taihu based on three-dimensional excita-tion emission matrix fluorescence %A 黄昌春 %A 李云梅 %A 王桥 %A 施坤 %A 金鑫 %A 王彦飞 %A HUANG,Changchun %A LI,Yunmei %A WANG,Qiao %A SHI,Kun %A JIN,Xin %A WANG,Yanfei %J 湖泊科学 %J Journal of Lake Sciences %@ 1003-5427 %V 22 %N 3 %D 2010 %P 375-382 %K CDOM;三维荧光光谱;荧光基团;平行因子分析;太湖 %K CDOM;3DEEM;fluorophores;parallel factor analysis;Lake Taihu %X 基于2008年11月份太湖全湖69个样点的CDOM三维荧光光谱数据,将平行因子分析法与现有荧光基团相结合,确定CDOM的组成成分及其荧光光谱特征,进一步分析其动力学机制.太湖CDOM荧光基团主要是类腐殖质,其类蛋白质组分可能主要来源于太湖水体生物残骸;同时,类腐殖质荧光发射波长随着荧光强度的增加向长波方向移动,存在"红移"效应.利用平行因子分析法可以将三维荧光矩阵分解为6个主成分,这6种成分可以解释92.48%的变量,平均贡献率分别是PCI占19.709%,PC2占18.685%,PC3占16.914%、PC4占16.62%、PC5占15.514%、PC6占12.558%.275nm处的吸收系数肩值除去受陆源类腐殖质影响外,影响其大小的主要是峰N,其次是峰M;而影响该肩值形状的主要是峰A和N,其次是峰T和M.根据荧光基团的类别,太湖CDOM源类型可以分为四类:①陆源主导类型;②偏陆源主导类型;③偏海源主导类型;④海源主导类型. %X Parallel factor analysis and known fluorophores were used to characterize and identify the components of CDOM,and the dynamics of CDOM was analyzed further based on the Three-Dimensional Excitation Emission Matrix Fluorescence Spectroscopy (3DEEM) of CDOM measured on Nov. 2008 in lake Taihu. Humic-like matter was the mainly fluorophores of CDOM. The source of Protein-like maybe the debris of aquatic organism. The emit wavelength of Humic-like moved to the long wavelength with the in- crease of fluorescence intensity, namely, the "Red Shift" effect. The 3DEEM can be decomposed to six primary components by the parallel factor analysis, and six components can explain 92.48% variation, and the average contribution of six primary components to 3DEEM were 19.7090/(PC1),18. 685%(PC2),16. 914(PC3),16. 62%(PC4),l5. 514%(PC5)and 12.5580/(PC6),respectively. The value of abso lion shoulder in the 275nm was mainly affected by peak N,following peak M. The main influencing factors of its shape was peak A and N, then peak T and M. The source of CDOM can be divided into Four styles accord-ing to the tluorophores types; terrestrial dominate style, leaning-terrestrial dominate style, leaning-autochthonous dominate style and autochthonous dominate style. %R 10.18307/2010.0309 %U http://www.jlakes.org/ch/reader/view_abstract.aspx %1 JIS Version 3.0.0