黄河口及邻近渤海海域悬浮体和沉积物中有机碳、氮的分布特征及其影响因素  

Distribution of Organic Carbon,Nitrogen in Suspended and Surface Sediments and Their Controlling Factors off the Huanghe(Yellow River) Mouth and the Nearby Bohai Sea

作　　者：乔淑卿[1] 石学法[1] 白亚之[1] 熊林芳[1] 朱爱美[1] 刘焱光[1] 方习生[1] 

机构地区：[1]海洋沉积与环境地质国家海洋局重点实验室国家海洋局第一海洋研究所,山东青岛266061

出　　处：《沉积学报》2011年第2期354-362,共9页Acta Sedimentologica Sinica

基　　金：国家自然科学基金项目(批准号:40806026);国家海洋局908专项项目(编号:908-02-02-05;908-02-01-04);国家海洋公益项目(编号:200805063);博士后基金项目资助

摘　　要：利用元素分析仪对2007年获取的黄河口及邻近渤海海域悬浮体和沉积物进行了有机碳、氮含量分析。结果表明,在同一站位有机碳大体上的分布为,表层沉积物中TOC含量≤底层悬浮体中POC含量<表层悬浮体中POC含量;依据表层沉积物中TOC、TN含量和悬浮体中POC的分布,研究区可划分为5个区,依次为莱州湾西部靠近黄河口区(Ⅰ和Ⅱ区)、莱州湾南部(Ⅲ区)、莱州湾东南部(Ⅳ区)和莱州湾北部(Ⅴ区)。Ⅰ区位于清8分汊口外,以POC、C/N值高和TOC、TN值低为特征;Ⅱ区位于现代黄河口近岸区域,以TOC、TN、C/N值高和POC值低为主要特征;Ⅲ、Ⅳ和Ⅴ区位于119.5°E以东的区域,这些区域POC值较高,而TOC、TN和C/N值较低。各区POC、TOC、TN的含量和分布主要受河流排放、排污口输入、海洋生物生产力和沉积动力环境的影响。A large-scale hydrological and sedimentological investigation was carried out off the Huanghe（Yellow River）mouth and the nearby Bohai Sea during August-September 2007.Approximately 227 suspended sediments and 245 surface sediments samples were selected to determine organic carbon and nitrogen contents using an elemental analysis instrument.The analyzed data show that the TOC content in surface sediment is lower than POC content in bottom suspended sediments and especially lower than that in surface suspended sediments in the same sampling stations. The study area can be classified into five provinces based on TOC,TN and POC data.ProvinceⅠlocated near the Qing8 outlet is characterized by higher POC content in suspended sediments,while lower TOC,TN contents and higher C/N values in surface sediments.In contrast,the POC contents in suspended sediments are lower,while TOC,TN contents and C/N values in surface sediments are higher in the provinceⅡ,which covers on both sides of the modern Huanghe mouth.ProvincesⅢ,ⅣandⅤare distributed east of 119.5°E,where the POC contents are higher,while TOC,TN contents and C/N values are lower.The results demonstrate that the contents of POC,TOC,TN and their distribution are mainly controlled by sources and sedimentary dynamic environment.

关 键 词：沉积物 黄河 渤海 悬浮体 有机质 物源 

分 类 号：P593[天文地球—地球化学]