Data/hora: 09/06/2024 08:33:29

Provedor de dados: | 5
País: | France
Título: | Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments
Autores: | Faust, Johan C.; Tessin, Allyson; Fisher, Ben J.; Zindorf, Mark Sebastian; Papadaki, Sonia; Hendry, Katharine R.; Doyle, Katherine A.; März, Christian.
Data: | 2021-12
Ano: | 2021
Palavras-chave: | Carbon cycle; Geochemistry.
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.
Tipo: | Text
Idioma: | Inglês

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/

Editor: | Springer Science and Business Media LLC
Formato: | application/pdf
Fonte: | Nature Communications (2041-1723) (Springer Science and Business Media LLC), 2021-12 , Vol. 12 , N. 1 , P. 275 (9p.)

Fonte:

info:eu-repo/semantics/openAccess

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