| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments
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| Autores: |
Faust, Johan C.
Tessin, Allyson
Fisher, Ben J.
Zindorf, Mark Sebastian
Papadaki, Sonia
Hendry, Katharine R.
Doyle, Katherine A.
März, Christian
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| Data: |
2021-12
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| Ano: |
2021
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| Palavras-chave: |
Carbon cycle
Geochemistry
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| Resumo: |
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.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00675/78755/80923.pdf
https://archimer.ifremer.fr/doc/00675/78755/80924.pdf
https://archimer.ifremer.fr/doc/00675/78755/80925.pdf
https://archimer.ifremer.fr/doc/00675/78755/80926.pdf
https://archimer.ifremer.fr/doc/00675/78755/80927.xlsx
DOI:10.1038/s41467-020-20550-0
https://archimer.ifremer.fr/doc/00675/78755/
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| Editor: |
Springer Science and Business Media LLC
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| Formato: |
application/pdf
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| Fonte: |
Nature Communications (2041-1723) (Springer Science and Business Media LLC), 2021-12 , Vol. 12 , N. 1 , P. 275 (9p.)
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| Direitos: |
info:eu-repo/semantics/openAccess
restricted use
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