Abruptly attenuated carbon sequestration with Weddell Sea dense waters by 2100
Antarctic Bottom Water formation, such as in the Weddell Sea, is an efficient vector for carbon sequestration on time scales of centuries. Possible changes in carbon sequestration under changing environmental conditions are unquantified to date, mainly due to difficulties in simulating the relevant...
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ftpubmed:oai:pubmedcentral.nih.gov:9198026 2023-05-15T13:53:10+02:00 Abruptly attenuated carbon sequestration with Weddell Sea dense waters by 2100 Nissen, Cara Timmermann, Ralph Hoppema, Mario Gürses, Özgür Hauck, Judith 2022-06-14 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9198026/ https://doi.org/10.1038/s41467-022-30671-3 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9198026/ http://dx.doi.org/10.1038/s41467-022-30671-3 © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . CC-BY Nat Commun Article Text 2022 ftpubmed https://doi.org/10.1038/s41467-022-30671-3 2022-06-19T00:57:45Z Antarctic Bottom Water formation, such as in the Weddell Sea, is an efficient vector for carbon sequestration on time scales of centuries. Possible changes in carbon sequestration under changing environmental conditions are unquantified to date, mainly due to difficulties in simulating the relevant processes on high-latitude continental shelves. Here, we use a model setup including both ice-shelf cavities and oceanic carbon cycling and demonstrate that by 2100, deep-ocean carbon accumulation in the southern Weddell Sea is abruptly attenuated to only 40% of the 1990s rate in a high-emission scenario, while the rate in the 2050s and 2080s is still 2.5-fold and 4-fold higher, respectively, than in the 1990s. Assessing deep-ocean carbon budgets and water mass transformations, we attribute this decline to an increased presence of modified Warm Deep Water on the southern Weddell Sea continental shelf, a 16% reduction in sea-ice formation, and a 79% increase in ice-shelf basal melt. Altogether, these changes lower the density and volume of newly formed bottom waters and reduce the associated carbon transport to the abyss. Text Antarc* Antarctic Ice Shelf Sea ice Weddell Sea PubMed Central (PMC) Antarctic Weddell Weddell Sea Nature Communications 13 1 |
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Article Nissen, Cara Timmermann, Ralph Hoppema, Mario Gürses, Özgür Hauck, Judith Abruptly attenuated carbon sequestration with Weddell Sea dense waters by 2100 |
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description |
Antarctic Bottom Water formation, such as in the Weddell Sea, is an efficient vector for carbon sequestration on time scales of centuries. Possible changes in carbon sequestration under changing environmental conditions are unquantified to date, mainly due to difficulties in simulating the relevant processes on high-latitude continental shelves. Here, we use a model setup including both ice-shelf cavities and oceanic carbon cycling and demonstrate that by 2100, deep-ocean carbon accumulation in the southern Weddell Sea is abruptly attenuated to only 40% of the 1990s rate in a high-emission scenario, while the rate in the 2050s and 2080s is still 2.5-fold and 4-fold higher, respectively, than in the 1990s. Assessing deep-ocean carbon budgets and water mass transformations, we attribute this decline to an increased presence of modified Warm Deep Water on the southern Weddell Sea continental shelf, a 16% reduction in sea-ice formation, and a 79% increase in ice-shelf basal melt. Altogether, these changes lower the density and volume of newly formed bottom waters and reduce the associated carbon transport to the abyss. |
format |
Text |
author |
Nissen, Cara Timmermann, Ralph Hoppema, Mario Gürses, Özgür Hauck, Judith |
author_facet |
Nissen, Cara Timmermann, Ralph Hoppema, Mario Gürses, Özgür Hauck, Judith |
author_sort |
Nissen, Cara |
title |
Abruptly attenuated carbon sequestration with Weddell Sea dense waters by 2100 |
title_short |
Abruptly attenuated carbon sequestration with Weddell Sea dense waters by 2100 |
title_full |
Abruptly attenuated carbon sequestration with Weddell Sea dense waters by 2100 |
title_fullStr |
Abruptly attenuated carbon sequestration with Weddell Sea dense waters by 2100 |
title_full_unstemmed |
Abruptly attenuated carbon sequestration with Weddell Sea dense waters by 2100 |
title_sort |
abruptly attenuated carbon sequestration with weddell sea dense waters by 2100 |
publisher |
Nature Publishing Group UK |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9198026/ https://doi.org/10.1038/s41467-022-30671-3 |
geographic |
Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Ice Shelf Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Shelf Sea ice Weddell Sea |
op_source |
Nat Commun |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9198026/ http://dx.doi.org/10.1038/s41467-022-30671-3 |
op_rights |
© The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-022-30671-3 |
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Nature Communications |
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13 |
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