辽河口秋季有色溶解有机物的光谱特征研究

研究辽河口2013年秋季有色溶解有机物（CDOM）的吸收光谱和三维荧光光谱特征。采用PARAFAC分析得到两种类腐殖质组分C2235（310）nm/390 nm]和C3230（265、360）nm/445 nm]，以及两种类蛋白质组分C1225（280）nm/330 nm]和C4（250 nm/305 nm）。在河口混合过程中，两种类腐殖质组分呈保守行为，两种类蛋白质组分呈不保守行为；CDOM吸收系数a（355）结果表明，研究区域CDOM含量总体上由河到海逐渐降低，陆源径流输入是CDOM的主要来源。a（355）与类腐殖质组分的显著正相关关系表明，类腐殖质荧光团与CDOM发色团之间在来源和结构上存在紧密的联系。

Spectral characteristics of chromophoric dissolved organic matter in Liaohe River estuary in autumn

Absorption spectroscopy and fluorescence excitation-emission matrix spectroscopy (EEMs) of chromophoric dissolved organic matter (CDOM) were studied in Liaohe River estuary in autumn 2013.Parallel factor analysis was applied andresults show that four fluorescent components were detected in Liaohe River estuary in Autumn,2013,which included two humic-like components,(C2 (235 (310) nm/390 nm) and C3 (230 (265,360) nm/445 nm)),and two protein-like components,(C1 (225 (280) nm/330 nm) and C4 (250 nm/305 nm)).The two humic-like components behaved conservatively in the whole estuary,while the two protein-like components were non-conservative at the same time.Based on the a(355) data,the concentration of CDOM generally decreased from the river to the sea.And CDOM was primarily contributed by terrestrial discharge.The significant positive relationship between a(355) and humic-like components suggested that humic-like fluorophores and chromophores of CDOM had similar source and structure.