利用三维荧光光谱（EEMs）结合平行因子分析（PARAFAC）, 研究了东海夏、 秋两季溶解有机物（DOM）的荧光组分特征, 并对其种类、 分布和来源进行了分析和讨论。 共识别出三个荧光组分, 分别为类蛋白荧光组分C1（235, 280/330）、 陆源或海源类腐殖质组分C2(255, 330/400)以及陆源类腐殖质组分C3（275, 360/480）。 两个类腐殖质组分C2和C3之间呈显著正相关, 表明他们有相同的来源或在结构上存在某种联系。 三组分在两个季节不同水层的分布总体呈现近岸高, 远海低的特点。 各组分与叶绿素a和盐度的关系表明调查海域的DOM受现存浮游植物的直接影响很小, 夏季长江输入是长江口三组分的重要来源, 而秋季受长江输入的影响减弱。 本研究显示了三维荧光与平行因子分析相结合在海洋溶解有机物的研究中具有很好的应用前景。

Using excitation-emission matrix spectrum(EEMs) combined with parallel factor analysis(PARAFAC) examine the fluorescent components feature of dissolved organic matter (DOM) sampled from East China Sea in the summer and autumn was examined. The type, distribution and origin of the fluorescence dissolved organic matter were also discussed. Three fluorescent components were identified by PARAFAC, including protein-like component C1(235, 280/330), terrestrial or marine humic-like component C2(255, 330/400) and terrestrial humic-like component C3(275, 360/480). The good linearity of the two humic-like components showed the same source or some relationship between the chemical constitutions. As a whole, the level of the fluorescence intensity in coastal ocean was higher than that of the open ocean in different water layers in two seasons. The relationship of three components with chlorophyll-a and salinity showed the DOM in the study area is almost not influenced by the living algal matter, but the fresh water outflow of the Yangtze River might be the source of them in the Yangtze River estuary in Summer. From what has been discussed above, we can draw the conclusion that the application of EEM-PARAFAC modeling will exert a profound influence upon the research of the dissolved organic matter.