Decadal variability of diatom productivity over the East China Sea Shelf

摘要：

　　Multiple proxies,including biogenic silica,Ba,Zn (i.e.bSiO2,Baex and Znex),and authigenic uranium (i.e.Uex),were determined in a sediment core to examine the decadal variability of diatom productivity over the East China Sea (ECS) Shelf.The contents of bSiO2 showed periodicities of 18 to 25 years during the past 200 years.The decadal variability of Baex,Znex and Uex fairly match the temporal pattern of bSiO2 though their tracking mechanism are very different,strongly supporting the decadal oscillation of diatom productivity in the ECS.Overall,the bSiO2 contents increased from 1850s to 1960s,however it decreased after 1960s,corresponding to the descended riverine silicate resulted from anthropogenic activities.These results suggested that the East China Sea has been affected by the Pacific Decadal Oscillation (PDO) in a manner similar to adjacent western North Pacific,but anthropogenic activities are changing its ecosystem to a scenario.

关键词： Decadal excess barium East China Sea paleoproductivity

作者: Weifeng Yang Min Chen

作者单位: State Key Laboratory of Marine Environmental Sciences, Xiamen University, Xiamen, China, 361005 College of Ocean and Earth Sciences, Xiamen University, Xiamen, China, 361005

会议类型: 国际会议

会议名称: The 17th Pacific -Asian Marginal Seas Meeting(第十七届太平洋与亚洲边缘海国际会议)

会议地点: 杭州

会议语种:英文

页码: 1067-1072

在线出版日期: 2013-04-23（万方平台首次上网日期，不代表论文的发表时间）