Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments
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 carbo...
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ftleedsuniv:oai:eprints.whiterose.ac.uk:168725 2023-05-15T14:25:40+02:00 Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments Faust, JC Tessin, A Fisher, BJ Zindorf, M Papadaki, S Hendry, KR Doyle, KA Maerz, C 2021-01-12 text https://eprints.whiterose.ac.uk/168725/ https://eprints.whiterose.ac.uk/168725/7/s41467-020-20550-0.pdf en eng Springer Nature https://eprints.whiterose.ac.uk/168725/7/s41467-020-20550-0.pdf Faust, JC orcid.org/0000-0001-8177-7097 , Tessin, A, Fisher, BJ orcid.org/0000-0001-7113-2818 et al. (5 more authors) (2021) Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments. Nature Communications, 12. 275. ISSN 2041-1723 cc_by_4 CC-BY Article NonPeerReviewed 2021 ftleedsuniv 2023-01-30T22:34:59Z 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. Article in Journal/Newspaper Arctic Arctic Barents Sea White Rose Research Online (Universities of Leeds, Sheffield & York) Arctic Barents Sea |
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Open Polar |
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White Rose Research Online (Universities of Leeds, Sheffield & York) |
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ftleedsuniv |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Faust, JC Tessin, A Fisher, BJ Zindorf, M Papadaki, S Hendry, KR Doyle, KA Maerz, C |
spellingShingle |
Faust, JC Tessin, A Fisher, BJ Zindorf, M Papadaki, S Hendry, KR Doyle, KA Maerz, C Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments |
author_facet |
Faust, JC Tessin, A Fisher, BJ Zindorf, M Papadaki, S Hendry, KR Doyle, KA Maerz, C |
author_sort |
Faust, JC |
title |
Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments |
title_short |
Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments |
title_full |
Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments |
title_fullStr |
Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments |
title_full_unstemmed |
Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments |
title_sort |
millennial scale persistence of organic carbon bound to iron in arctic marine sediments |
publisher |
Springer Nature |
publishDate |
2021 |
url |
https://eprints.whiterose.ac.uk/168725/ https://eprints.whiterose.ac.uk/168725/7/s41467-020-20550-0.pdf |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Arctic Barents Sea |
genre_facet |
Arctic Arctic Barents Sea |
op_relation |
https://eprints.whiterose.ac.uk/168725/7/s41467-020-20550-0.pdf Faust, JC orcid.org/0000-0001-8177-7097 , Tessin, A, Fisher, BJ orcid.org/0000-0001-7113-2818 et al. (5 more authors) (2021) Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments. Nature Communications, 12. 275. ISSN 2041-1723 |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
_version_ |
1766298116588306432 |