Institutional Repository of Key Laboratory of Marine Ecology & Environmental Sciences, CAS
|Place of Conferral||北京|
|Keyword||三维荧光光谱 平行因子分析 有色溶解有机物 沉积物|
|Other Abstract|| 三维荧光光谱结合平行因子分析法（EEMs-PARAFAC）是目前研究海洋有色溶解有机物（CDOM）的最有效手段之一，本文利用此方法对黄东海海域水体及沉积物中的CDOM进行了研究，同时结合季节特点和温盐情况，分析了它们的组分构成，来源，分布情况等特点。|
（3）冬季黄海的沉积物样品在分离间隙水，提取水萃有机物和碱萃有机物之后，与对应站位的底层水样品分别建立了4个PARAFAC模型。对底层水的CDOM，以及沉积物的PDOM,WEOM和AEOM进行分析，得到的各组分波长有红移的趋势，且类腐殖化特征逐渐增强的特点。同一模型得到的相同属性的组分间来源相近，而不同模型得到的类色氨酸组分之间没有显著相关性，说明底层水有机物与PDOM之间的非耦合性。沉积物有机物SOM与沉积物水萃有机物WEOM之间呈现一定程度的相关性。底层水，PDOM,WEOM和AEOM之间的HIX和BIX的差异体现了其中有机物的腐殖化程度的不同和“新旧”差异。; EEMs-PARAFAC is currently one of the most effective research means to study marine CDOM. This study used this method to research CDOM of water and the sediment of the Yellow-East Sea, combined with integrated seasonal characteristics and the condition of the temperature and salinity of that area, its component constituting, source, seasonal feature and distribution pattern were analyzed.
(1) Four components were obtained by analysis of spring North Yellow Sea: Humic-like components C1（260,315/425）and C2（295,355/490）; protein-like components C3（275/310）and C4（230,290/345), which showed that they shared some similarities in origin and structure, and the same type components had more similar origins. Four fluorescent components and the total fluorescence intensity distributing features at both horizontal and vertical directions indicate that CDOM at the near shore side had a noticeable and combined impact by terrestrial input, coastal currents and ocean water masses. HIX and BIX also showed that CDOM were more impacted by terrigenous sources, while the sea side were more impacts by biological activity.
(2) Using PARAFAC model to analyses samples of the Yellow-East Sea and 4 components were found: the humic-like C1(260,310/415nm) and C3(295，360/500), the protein-like C1（280，335）and C4（270/310）. The horizontal and vertical distribution of total florescent intensity showed a high similarity between the source of humic-like and protein-like components and at the same time showed the source of CDOM could be impacted by terrigenous input, also collective effected by coastal currents and water mass movements. HIX and BIX showed inversed distribution, which meant CDOM had higher degree of humification at coastal area, while had higher level of autogenous production at sea side.
(3) The PDOM, WEOM and AEOM of Yellow Sea sediment samples and the bottom water samples were respectively established for 4 PARAFAC models. The characterizing of CDOM in bottom water and the PDOM, WEOM and AEOM of sediments showed the wavelengths of components had the trend of red shift and the humus feature were gradually enhanced. The same property components which came from the same model had the similar sources, while there was no significant correlation between the tryptophan components from the different models, which showed the non-coupling between the CDOM of bottom water and PDOM. SOM and WEOM showed a certain degree of correlation. The differences of HIX and BIX between the bottom water, PDOM, WEOM and AEOM reflected the difference level of humification degree and their “freshness”.
|First Author Affilication||Key Laboratory of Marine Ecology & Environmental Sciences, CAS|
|药怡良. 黄东海水体及沉积物中有色溶解有机物的研究[D]. 北京. 中国科学院大学,2016.|
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