Does Arctic warming reduce preservation of organic matter in Barents Sea sediments?
Over the last few decades, the Barents Sea experienced substantial warming, an expansion of relatively warm Atlantic water and a reduction in sea ice cover. This environmental change forces the entire Barents Sea ecosystem to adapt and restructure and therefore changes in pelagic–benthic coupling, o...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Online Access: | http://dro.dur.ac.uk/31705/ http://dro.dur.ac.uk/31705/1/31705.pdf https://doi.org/10.1098/rsta.2019.0364 |
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:31705 2023-05-15T14:58:33+02:00 Does Arctic warming reduce preservation of organic matter in Barents Sea sediments? Faust, Johan C. Stevenson, Mark A. Abbott, Geoffrey D. Knies, Jochen Tessin, Allyson Mannion, Isobel Ford, Ailbe Hilton, Robert Peakall, Jeffrey März, Christian 2020-10 application/pdf http://dro.dur.ac.uk/31705/ http://dro.dur.ac.uk/31705/1/31705.pdf https://doi.org/10.1098/rsta.2019.0364 unknown Royal Society dro:31705 issn:1364-503X issn: 1471-2962 doi:10.1098/rsta.2019.0364 http://dro.dur.ac.uk/31705/ https://doi.org/10.1098/rsta.2019.0364 http://dro.dur.ac.uk/31705/1/31705.pdf Philosophical transactions of the Royal Society A : mathematical, physical and engineering sciences, 2020, Vol.378(2181), pp.20190364 [Peer Reviewed Journal] Article PeerReviewed 2020 ftunivdurham https://doi.org/10.1098/rsta.2019.0364 2020-09-10T22:22:26Z Over the last few decades, the Barents Sea experienced substantial warming, an expansion of relatively warm Atlantic water and a reduction in sea ice cover. This environmental change forces the entire Barents Sea ecosystem to adapt and restructure and therefore changes in pelagic–benthic coupling, organic matter sedimentation and long-term carbon sequestration are expected. Here we combine new and existing organic and inorganic geochemical surface sediment data from the western Barents Sea and show a clear link between the modern ecosystem structure, sea ice cover and the organic carbon and CaCO3 contents in Barents Sea surface sediments. Furthermore, we discuss the sources of total and reactive iron phases and evaluate the spatial distribution of organic carbon bound to reactive iron. Consistent with a recent global estimate we find that on average 21.0 ± 8.3 per cent of the total organic carbon is associated to reactive iron (fOC-FeR) in Barents Sea surface sediments. The spatial distribution of fOC-FeR, however, seems to be unrelated to sea ice cover, Atlantic water inflow or proximity to land. Future Arctic warming might, therefore, neither increase nor decrease the burial rates of iron-associated organic carbon. However, our results also imply that ongoing sea ice reduction and the associated alteration of vertical carbon fluxes might cause accompanied shifts in the Barents Sea surface sedimentary organic carbon content, which might result in overall reduced carbon sequestration in the future. Article in Journal/Newspaper Arctic Barents Sea Sea ice Durham University: Durham Research Online Arctic Barents Sea Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378 2181 20190364 |
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Open Polar |
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Durham University: Durham Research Online |
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ftunivdurham |
language |
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description |
Over the last few decades, the Barents Sea experienced substantial warming, an expansion of relatively warm Atlantic water and a reduction in sea ice cover. This environmental change forces the entire Barents Sea ecosystem to adapt and restructure and therefore changes in pelagic–benthic coupling, organic matter sedimentation and long-term carbon sequestration are expected. Here we combine new and existing organic and inorganic geochemical surface sediment data from the western Barents Sea and show a clear link between the modern ecosystem structure, sea ice cover and the organic carbon and CaCO3 contents in Barents Sea surface sediments. Furthermore, we discuss the sources of total and reactive iron phases and evaluate the spatial distribution of organic carbon bound to reactive iron. Consistent with a recent global estimate we find that on average 21.0 ± 8.3 per cent of the total organic carbon is associated to reactive iron (fOC-FeR) in Barents Sea surface sediments. The spatial distribution of fOC-FeR, however, seems to be unrelated to sea ice cover, Atlantic water inflow or proximity to land. Future Arctic warming might, therefore, neither increase nor decrease the burial rates of iron-associated organic carbon. However, our results also imply that ongoing sea ice reduction and the associated alteration of vertical carbon fluxes might cause accompanied shifts in the Barents Sea surface sedimentary organic carbon content, which might result in overall reduced carbon sequestration in the future. |
format |
Article in Journal/Newspaper |
author |
Faust, Johan C. Stevenson, Mark A. Abbott, Geoffrey D. Knies, Jochen Tessin, Allyson Mannion, Isobel Ford, Ailbe Hilton, Robert Peakall, Jeffrey März, Christian |
spellingShingle |
Faust, Johan C. Stevenson, Mark A. Abbott, Geoffrey D. Knies, Jochen Tessin, Allyson Mannion, Isobel Ford, Ailbe Hilton, Robert Peakall, Jeffrey März, Christian Does Arctic warming reduce preservation of organic matter in Barents Sea sediments? |
author_facet |
Faust, Johan C. Stevenson, Mark A. Abbott, Geoffrey D. Knies, Jochen Tessin, Allyson Mannion, Isobel Ford, Ailbe Hilton, Robert Peakall, Jeffrey März, Christian |
author_sort |
Faust, Johan C. |
title |
Does Arctic warming reduce preservation of organic matter in Barents Sea sediments? |
title_short |
Does Arctic warming reduce preservation of organic matter in Barents Sea sediments? |
title_full |
Does Arctic warming reduce preservation of organic matter in Barents Sea sediments? |
title_fullStr |
Does Arctic warming reduce preservation of organic matter in Barents Sea sediments? |
title_full_unstemmed |
Does Arctic warming reduce preservation of organic matter in Barents Sea sediments? |
title_sort |
does arctic warming reduce preservation of organic matter in barents sea sediments? |
publisher |
Royal Society |
publishDate |
2020 |
url |
http://dro.dur.ac.uk/31705/ http://dro.dur.ac.uk/31705/1/31705.pdf https://doi.org/10.1098/rsta.2019.0364 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Barents Sea Sea ice |
genre_facet |
Arctic Barents Sea Sea ice |
op_source |
Philosophical transactions of the Royal Society A : mathematical, physical and engineering sciences, 2020, Vol.378(2181), pp.20190364 [Peer Reviewed Journal] |
op_relation |
dro:31705 issn:1364-503X issn: 1471-2962 doi:10.1098/rsta.2019.0364 http://dro.dur.ac.uk/31705/ https://doi.org/10.1098/rsta.2019.0364 http://dro.dur.ac.uk/31705/1/31705.pdf |
op_doi |
https://doi.org/10.1098/rsta.2019.0364 |
container_title |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
378 |
container_issue |
2181 |
container_start_page |
20190364 |
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1766330687878594560 |