Deglacial bottom water warming intensified Arctic methane seepage in the NW Barents Sea
Abstract Changes in the Arctic climate-ocean system can rapidly impact carbon cycling and cryosphere. Methane release from the seafloor has been widespread in the Barents Sea since the last deglaciation, being closely linked to changes in pressure and bottom water temperature. Here, we present a pos...
Published in: | Communications Earth & Environment |
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2021
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crspringernat:10.1038/s43247-021-00264-x 2023-05-15T14:31:46+02:00 Deglacial bottom water warming intensified Arctic methane seepage in the NW Barents Sea El bani Altuna, Naima Rasmussen, Tine Lander Ezat, Mohamed Mahmoud Vadakkepuliyambatta, Sunil Groeneveld, Jeroen Greaves, Mervyn 2021 http://dx.doi.org/10.1038/s43247-021-00264-x https://www.nature.com/articles/s43247-021-00264-x.pdf https://www.nature.com/articles/s43247-021-00264-x en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Communications Earth & Environment volume 2, issue 1 ISSN 2662-4435 General Earth and Planetary Sciences General Environmental Science journal-article 2021 crspringernat https://doi.org/10.1038/s43247-021-00264-x 2022-01-04T07:33:07Z Abstract Changes in the Arctic climate-ocean system can rapidly impact carbon cycling and cryosphere. Methane release from the seafloor has been widespread in the Barents Sea since the last deglaciation, being closely linked to changes in pressure and bottom water temperature. Here, we present a post-glacial bottom water temperature record (18,000–0 years before present) based on Mg/Ca in benthic foraminifera from an area where methane seepage occurs and proximal to a former Arctic ice-sheet grounding zone. Coupled ice sheet-hydrate stability modeling shows that phases of extreme bottom water temperature up to 6 °C and associated with inflow of Atlantic Water repeatedly destabilized subsurface hydrates facilitating the release of greenhouse gasses from the seabed. Furthermore, these warming events played an important role in triggering multiple collapses of the marine-based Svalbard-Barents Sea Ice Sheet. Future warming of the Atlantic Water could lead to widespread disappearance of gas hydrates and melting of the remaining marine-terminating glaciers. Article in Journal/Newspaper arctic methane Arctic Barents Sea Foraminifera* Ice Sheet Sea ice Svalbard Svalbard-Barents Sea Ice sheet Springer Nature (via Crossref) Arctic Barents Sea Svalbard Communications Earth & Environment 2 1 |
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Open Polar |
collection |
Springer Nature (via Crossref) |
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crspringernat |
language |
English |
topic |
General Earth and Planetary Sciences General Environmental Science |
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General Earth and Planetary Sciences General Environmental Science El bani Altuna, Naima Rasmussen, Tine Lander Ezat, Mohamed Mahmoud Vadakkepuliyambatta, Sunil Groeneveld, Jeroen Greaves, Mervyn Deglacial bottom water warming intensified Arctic methane seepage in the NW Barents Sea |
topic_facet |
General Earth and Planetary Sciences General Environmental Science |
description |
Abstract Changes in the Arctic climate-ocean system can rapidly impact carbon cycling and cryosphere. Methane release from the seafloor has been widespread in the Barents Sea since the last deglaciation, being closely linked to changes in pressure and bottom water temperature. Here, we present a post-glacial bottom water temperature record (18,000–0 years before present) based on Mg/Ca in benthic foraminifera from an area where methane seepage occurs and proximal to a former Arctic ice-sheet grounding zone. Coupled ice sheet-hydrate stability modeling shows that phases of extreme bottom water temperature up to 6 °C and associated with inflow of Atlantic Water repeatedly destabilized subsurface hydrates facilitating the release of greenhouse gasses from the seabed. Furthermore, these warming events played an important role in triggering multiple collapses of the marine-based Svalbard-Barents Sea Ice Sheet. Future warming of the Atlantic Water could lead to widespread disappearance of gas hydrates and melting of the remaining marine-terminating glaciers. |
format |
Article in Journal/Newspaper |
author |
El bani Altuna, Naima Rasmussen, Tine Lander Ezat, Mohamed Mahmoud Vadakkepuliyambatta, Sunil Groeneveld, Jeroen Greaves, Mervyn |
author_facet |
El bani Altuna, Naima Rasmussen, Tine Lander Ezat, Mohamed Mahmoud Vadakkepuliyambatta, Sunil Groeneveld, Jeroen Greaves, Mervyn |
author_sort |
El bani Altuna, Naima |
title |
Deglacial bottom water warming intensified Arctic methane seepage in the NW Barents Sea |
title_short |
Deglacial bottom water warming intensified Arctic methane seepage in the NW Barents Sea |
title_full |
Deglacial bottom water warming intensified Arctic methane seepage in the NW Barents Sea |
title_fullStr |
Deglacial bottom water warming intensified Arctic methane seepage in the NW Barents Sea |
title_full_unstemmed |
Deglacial bottom water warming intensified Arctic methane seepage in the NW Barents Sea |
title_sort |
deglacial bottom water warming intensified arctic methane seepage in the nw barents sea |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1038/s43247-021-00264-x https://www.nature.com/articles/s43247-021-00264-x.pdf https://www.nature.com/articles/s43247-021-00264-x |
geographic |
Arctic Barents Sea Svalbard |
geographic_facet |
Arctic Barents Sea Svalbard |
genre |
arctic methane Arctic Barents Sea Foraminifera* Ice Sheet Sea ice Svalbard Svalbard-Barents Sea Ice sheet |
genre_facet |
arctic methane Arctic Barents Sea Foraminifera* Ice Sheet Sea ice Svalbard Svalbard-Barents Sea Ice sheet |
op_source |
Communications Earth & Environment volume 2, issue 1 ISSN 2662-4435 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s43247-021-00264-x |
container_title |
Communications Earth & Environment |
container_volume |
2 |
container_issue |
1 |
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1766305309741023232 |