Characteristics of Organic Carbon and Nitrogen in Antarctic Marine Sediments and Their Paleoclimatic Significance:A Case Study on the Amundsen Sea
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
为了更好地理解目前南极冰盖与气候的演化,以及为未来冰盖和气候变化的预测提供依据,通过对A11-02孔沉积物的有机碳、氮含量与稳定同位素值进行分析,结合粒度和地球化学元素等特征,探讨了中全新世以来西南极阿蒙森海沉积物有机质的来源及古气候意义.沉积物的δ13Corg值指示有机质主要为海源输入,陆源有机质贡献相对较少.通过分析沉积物总有机碳含量及海源有机质含量变化,结合粒度及元素的变化特征,认为中全新世以来研究区古生产力的变化主要与气候变化有关,进而识别出4 750～4 500 a BP、3 600～3 400 a BP、2 250～2 000 a BP和600～400 a BP 4个寒冷阶段.
To better understand the current evolution of the Antarctic ice sheet and climate,as well as to provide a basis fo future predictions of ice sheet and climate change,the organic carbon and nitrogen contents and stable isotope values of sediments from Hole A11-02 were analyzed,combined with the characteristics of grain size and geochemical elements,to explore the origin and paleoclimatic significance of organic matter in sediments from the Amundsen Sea,West Antarctic since the mid-Holocene.The δ13Corg value of the sediments indicates that the organic matter is mainly input from marine,and the contribution of terrestrial organic matter is relatively small.By analyzing the changes of sediment total organic carbon content and sea source organic matter content,combined with the variation characteristics of grain size and elements,it is believed that the change of paleoproductivity in the study area since the mid-Holocene is mainly related to climate change,and then it is identified that there are four cold stages at 4 750-4 500 a BP,3 600-3 400 a BP,2 250-2 000 a BP and 600-400 a BP.
the Amundsen Seaorganic carbon and nitrogensource of organic matterpaleoclimatethe mid-Holocenemarine geology
NETL
NSTL
万方数据
