| 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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| 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 |
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| Components optical property of CDOM in Lake Taihu based on three-dimensional excita-tion emission matrix fluorescence |
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HUANG Changchun, LI Yunmei, WANG Qiao, SHI Kun, JIN Xin, WANG Yanfei
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Key Laboratory of Virtual Geographic Environment, Ministry of Education, Nanjing Normal University, Nanjing 210046, P. R. China
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| 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 |
