气候变化领域集成服务门户(CCPortal): Enrichment of Trace Metals (V, Cu, Co, Ni, and Mo) in Arctic Sediments—From Siberian Arctic Shelves to the Basin

CCPortal

DOI	10.1029/2020JC016960
	Enrichment of Trace Metals (V, Cu, Co, Ni, and Mo) in Arctic Sediments—From Siberian Arctic Shelves to the Basin
	Li L.; Wang X.; Ren Y.; Su H.; Hu L.; Yang G.; Li Z.; Bosin A.A.; Astakhov A.S.; Chen J.; Liu Y.; Shi X.
发表日期	2021
ISSN	21699275
卷号	126 期号:4
英文摘要	With 50% of the Arctic Ocean is consisted of continental shelves, extensive shelf-basin exchange processes exist here and plays a key role in regulating the biogeochemical recycling process of trace metals in the Arctic region. In this study, short sediment cores were collected along three transects from Siberian-Chukchi shelves to adjacent slope/basin areas. An increasing trend was found for the bulk concentrations of several metals (V, Cu, Co, Ni, and Mo) from shelf to slope/basin cores with increasing water depth. Sequential extraction experiments indicated that the Fe/Mn oxide fractions increased significantly from shelf (9%–21%) to basin cores (24%–76%) for Cu, Co, Ni, and V, while the organic/sulfide phase remained significant (∼40%) for Mo. In addition, the observed dissolved metal concentrations in porewater indicated the remobilization of Fe, Mn, and Mo from shelf sediment, while V was always removed from water to the sediment, both on the shelf or in the slope/basin. Overall, in combination with the statistical analysis, we proposed that metals are transported from shelves to the central Arctic and are scavenged mainly by Mn oxides from the water column, which results in the enrichment of metals in slope/basin sediment. With the climate change, such transport and accumulation mechanism may be intensified over time, slowly leading the Arctic sediment to be a more and more important sink for those metals. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Arctic sediments; Chukchi Sea; East Siberian shelf; metal speciation; trace metals; vanadium
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186394
作者单位	Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch Academy of Science, Vladivostok, Russian Federation
推荐引用方式 GB/T 7714	Li L.,Wang X.,Ren Y.,等. Enrichment of Trace Metals (V, Cu, Co, Ni, and Mo) in Arctic Sediments—From Siberian Arctic Shelves to the Basin[J],2021,126(4).
APA	Li L..,Wang X..,Ren Y..,Su H..,Hu L..,...&Shi X..(2021).Enrichment of Trace Metals (V, Cu, Co, Ni, and Mo) in Arctic Sediments—From Siberian Arctic Shelves to the Basin.Journal of Geophysical Research: Oceans,126(4).
MLA	Li L.,et al."Enrichment of Trace Metals (V, Cu, Co, Ni, and Mo) in Arctic Sediments—From Siberian Arctic Shelves to the Basin".Journal of Geophysical Research: Oceans 126.4(2021).