Relating the composition of continental margin surface sediments from the Ross Sea to the Amundsen Sea, West Antarctica, to modern environmental conditions

doi:10.13679/j.advps.2021.0005

IOCAS-IR

	Relating the composition of continental margin surface sediments from the Ross Sea to the Amundsen Sea, West Antarctica, to modern environmental conditions
	WANG Jiakai ; LI Tiegang; TANG Zheng ; XIONG Zhifang ; LIU Yanguang ; CHEN Zhihua ; CHANG Fengming
发表期刊	Advances in Polar Science
ISSN	1674-9928
	2022-03-15
出版年	2022
卷号	v.33;No.86 期号:01 页码:62-77
文献类型	CNKI期刊论文
摘要	Investigating the multiple proxies involving productivity,organic geochemistry,and trace element (TE) enrichment in surface sediments could be used as paleoenvironment archives to gain insights into past and future environmental conditions changes.We present redox-sensitive TEs (Mn,Ni,Cu,U,P,Mo,Co,V,Zn,and Cd),productivity-related proxies (total organic carbon and opal),and total nitrogen and CaCO_(3 )contents of bulk surface sediments of this area.The productivity proxies from the shelf and coastal regions of the Ross and the Amundsen seas showed that higher productivity was affiliated with an area of nutrient-rich deep water upwelling.The upwelling of weakly corrosive deep water may be beneficial for preserving CaCO_(3,)while highly corrosive dense water,if it forms on the shelf near the coastal region (coastal polynya),could limit the preservation of CaCO_3in modern conditions.There were no oxic or anoxic conditions in the study area,as indicated by the enrichment factors of redox-sensitive TEs (Mn,Co,and U).The enrichment factor of Cd,which is redox-sensitive,indicated suboxic redox conditions in sediment environments because of high primary productivity and organic matter preservation/decomposition.The enrichment factors of other redox-sensitive TEs (P,Ni,Cu,V,and Zn) and the correlations between the element/Ti ratio with productivity and nutrient proxies indicated that the organic matter decomposed,and there was massive burial of phytoplankton biomass.There was variation in the enrichment,such that sediments were enriched in P,Mo,and Zn,but depleted in Ni,Cu,and V.
关键词	redox nutrient productivity shelf and coastal region offshore of Ruppert and Hobbs coasts Ross Sea Amundsen Sea
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A010;A011;
CNKI专题名称	海洋学;地质学;
分类号	P736.21
收录类别	中科院核心 ; 中科院扩展
语种	英文;
DOI	10.13679/j.advps.2021.0005
资助项目(基金）	financially supported by National Polar Special Program “Impact and Response of Antarctic Seas to Climate Change” (Grant nos. IRASCC 01-03-02 and 02-03) ; supported by the Basic Scientific Fund for National Public Research Institutes of China (Grant no. 2019Q09) ; the National Natural Science Foundation of China (Grant nos. 41976080 and 41406220)
引用统计
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/187476
专题	中国科学院海洋研究所
作者单位	1.KeyLaboratoryofMarineGeologyandEnvironment,InstituteofOceanology,ChineseAcademyofSciences 2.UniversityofChineseAcademyofSciences 3.KeyLaboratoryofMarineGeologyandMetallogeny,FirstInstituteofOceanography,MinistryofNaturalandResources 4.LaboratoryforMarineGeology,QingdaoNationalLaboratoryforMarineScienceandTechnology
推荐引用方式 GB/T 7714	WANG Jiakai,LI Tiegang,TANG Zheng,et al. Relating the composition of continental margin surface sediments from the Ross Sea to the Amundsen Sea, West Antarctica, to modern environmental conditions. 2022.