中文摘要：

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．

英文摘要：

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. 709%（PC1）, 18. 685% （PC2）, 16. 914% （PC3）, 16.62% （PC4）, 15. 514% （PC5） and 12. 558% （PC6） , respectively. The value of absorption 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 according to the fluorophores types： terrestrial dominate style, leaning-terrestrial dominate style, leaning-autochthonous dominate style and autochthonous dominate style.