气候变化领域集成服务门户(CCPortal): Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments

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DOI	10.1038/s41467-020-20550-0
	Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments
	Faust J.C.; Tessin A.; Fisher B.J.; Zindorf M.; Papadaki S.; Hendry K.R.; Doyle K.A.; März C.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	Burial of organic material in marine sediments represents a dominant natural mechanism of long-term carbon sequestration globally, but critical aspects of this carbon sink remain unresolved. Investigation of surface sediments led to the proposition that on average 10-20% of sedimentary organic carbon is stabilised and physically protected against microbial degradation through binding to reactive metal (e.g. iron and manganese) oxides. Here we examine the long-term efficiency of this rusty carbon sink by analysing the chemical composition of sediments and pore waters from four locations in the Barents Sea. Our findings show that the carbon-iron coupling persists below the uppermost, oxygenated sediment layer over thousands of years. We further propose that authigenic coprecipitation is not the dominant factor of the carbon-iron bounding in these Arctic shelf sediments and that a substantial fraction of the organic carbon is already bound to reactive iron prior deposition on the seafloor. © 2021, The Author(s).
语种	英语
scopus关键词	arsenic; ferric hydroxide; ferric ion; ferric oxide; iron; manganese oxide; organic carbon; pore water; unclassified drug; water; authigenesis; biodegradation; carbon sequestration; chemical composition; microbial community; organic matter; porewater; precipitation (chemistry); sediment chemistry; Arctic Ocean; Article; Barents Sea; carbon sink; chemical bond; chemical composition; climate change; comparative study; continental shelf; controlled study; environmental change; environmental impact; marine environment; precipitation; sediment; total organic carbon; water analysis; Arctic Ocean; Barents Sea
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250789
作者单位	School of Earth and Environment, The University of Leeds, Leeds, United Kingdom; Department of Geology, Kent State University, Kent, OH, United States; Laboratoire Environnement Profond, Ifremer - Centre de Bretagne, Plouzané, France; School of Earth Sciences, University of Bristol, Bristol, United Kingdom
推荐引用方式 GB/T 7714	Faust J.C.,Tessin A.,Fisher B.J.,et al. Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments[J],2021,12(1).
APA	Faust J.C..,Tessin A..,Fisher B.J..,Zindorf M..,Papadaki S..,...&März C..(2021).Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments.Nature Communications,12(1).
MLA	Faust J.C.,et al."Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments".Nature Communications 12.1(2021).