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引用本文:黄昌春,李云梅,王桥,施坤,金鑫,王彦飞.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.湖泊科学,2010,22(3):375-382. DOI:10.18307/2010.0309
HUANG Changchun,LI Yunmei,WANG Qiao,SHI Kun,JIN Xin,WANG Yanfei.Components optical property of CDOM in Lake Taihu based on three-dimensional excita-tion emission matrix fluorescence. J. Lake Sci.2010,22(3):375-382. DOI:10.18307/2010.0309
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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
黄昌春, 李云梅, 王桥, 施坤, 金鑫, 王彦飞
南京师范大学虚拟地理环境教育部重点实验室, 南京 210046
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.
关键词:  CDOM  三维荧光光谱  荧光基团  平行因子分析  太湖
DOI:10.18307/2010.0309
分类号:
基金项目:国家十一五科技支撑计划项目(2008BAC34B05);江苏省2008年度普通高校研究生科研创新计划项目(CX08B_015Z);国家自然科学基金项目(40971215);江苏省2009年度普通高校研究生科研创新计划(CX09B-301Z);南师大优秀博士论文培养计划项目(1243211601036)联合资助
Components optical property of CDOM in Lake Taihu based on three-dimensional excita-tion emission matrix fluorescence
HUANG Changchun, LI Yunmei, WANG Qiao, SHI Kun, JIN Xin, WANG Yanfei
Key Laboratory of Virtual Geographic Environment, Ministry of Education, Nanjing Normal University, Nanjing 210046, P. R. China
Abstract:
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.
Key words:  CDOM  3DEEM  fluorophores  parallel factor analysis  Lake Taihu
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