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黄东海水体及沉积物中有色溶解有机物的研究
药怡良1,2
学位类型硕士
导师赵卫红
2016-05-13
学位授予单位中国科学院大学
学位授予地点北京
学位专业海洋生态学
关键词三维荧光光谱 平行因子分析 有色溶解有机物 沉积物
其他摘要    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。
     (1)春季北黄海海域的海水样品通过平行因子分析最终得到了4个荧光组分:类腐殖荧光组分C1(260,315/425)和C2(295,355/490)、类蛋白荧光组分C3(275/310)和C4(230,290/345)。4种组分在来源或者结构上都有一定的联系,且同类型的荧光组分间,来源更为相近。总荧光强度及四组分的荧光强度在水平和垂直方向上总体都呈现近岸高,远海降低的趋势,结合荧光指数来看,总体上显示出近岸受陆源输入影响较大,而离岸较远区域海洋生源特征更加明显的特点。       
    (2)PARAFAC模型对冬季黄东海海水样品分析后,得到了4个组分:类腐殖质荧光组分C1(260,310/415nm)、C3(295,360/500),类蛋白荧光组分C1(280,335)和C4(270/310)。同类型的组分间分别具有较高的相似性说明同类型组分的来源和结构更相近。总荧光强度和四组分的水平和垂直分布体现了CDOM既受到陆源输入的影响,又受到沿岸流系,以及海洋水团运动的共同作用。HIX和BIX的分布呈现反变关系,说明沿岸区域CDOM腐殖化程度更高,而向海一侧,CDOM腐殖化程度降低且有更多的海洋自生源产出。
    (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”.
 
 
学科领域地球科学
语种中文
文献类型学位论文
条目标识符http://ir.qdio.ac.cn/handle/337002/112502
专题海洋生态与环境科学重点实验室
作者单位1.中科院海洋研究所海洋生态与环境科学重点实验室
2.中国科学院大学
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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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