On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century
© The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Global Biogeochemical Cycles 29 (2015): 1451–1470, doi:10.1002/2015GB005140. We use a suite of eight ocean biogeochemical/ecological general circula...
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hdl.handle.net/1912/7656 |
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/7656 2023-05-15T18:24:54+02:00 On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century Hauck, Judith Volker, Chrisoph Wolf-Gladrow, Dieter A. Laufkötter, Charlotte Vogt, Meike Aumont, Olivier Bopp, Laurent Buitenhuis, Erik T. Doney, Scott C. Dunne, John P. Gruber, Nicolas Hashioka, Taketo John, Jasmin G. Le Quere, Corinne Lima, Ivan D. Nakano, Hideyuki Seferian, Roland Totterdell, Ian J. 2015-09-23 application/pdf https://hdl.handle.net/1912/7656 en_US eng John Wiley & Sons https://doi.org/10.1002/2015GB005140 Global Biogeochemical Cycles 29 (2015): 1451–1470 https://hdl.handle.net/1912/7656 doi:10.1002/2015GB005140 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Global Biogeochemical Cycles 29 (2015): 1451–1470 doi:10.1002/2015GB005140 Ocean carbon sink Export production CMIP5 Southern Annular Mode Polar carbon cycle Ecosystem model intercomparison Article 2015 ftwhoas https://doi.org/10.1002/2015GB005140 2022-05-28T22:59:27Z © The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Global Biogeochemical Cycles 29 (2015): 1451–1470, doi:10.1002/2015GB005140. We use a suite of eight ocean biogeochemical/ecological general circulation models from the Marine Ecosystem Model Intercomparison Project and Coupled Model Intercomparison Project Phase 5 archives to explore the relative roles of changes in winds (positive trend of Southern Annular Mode, SAM) and in warming- and freshening-driven trends of upper ocean stratification in altering export production and CO2 uptake in the Southern Ocean at the end of the 21st century. The investigated models simulate a broad range of responses to climate change, with no agreement on a dominance of either the SAM or the warming signal south of 44°S. In the southernmost zone, i.e., south of 58°S, they concur on an increase of biological export production, while between 44 and 58°S the models lack consensus on the sign of change in export. Yet in both regions, the models show an enhanced CO2 uptake during spring and summer. This is due to a larger CO2(aq) drawdown by the same amount of summer export production at a higher Revelle factor at the end of the 21st century. This strongly increases the importance of the biological carbon pump in the entire Southern Ocean. In the temperate zone, between 30 and 44°S, all models show a predominance of the warming signal and a nutrient-driven reduction of export production. As a consequence, the share of the regions south of 44°S to the total uptake of the Southern Ocean south of 30°S is projected to increase at the end of the 21st century from 47 to 66% with a commensurable decrease to the north. Despite this major reorganization of the meridional distribution of the major regions of uptake, the total uptake increases largely in line with the rising atmospheric CO2. Simulations with the MITgcm-REcoM2 model show that this is mostly driven by the strong increase of ... Article in Journal/Newspaper Southern Ocean Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Southern Ocean Global Biogeochemical Cycles 29 9 1451 1470 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Ocean carbon sink Export production CMIP5 Southern Annular Mode Polar carbon cycle Ecosystem model intercomparison |
spellingShingle |
Ocean carbon sink Export production CMIP5 Southern Annular Mode Polar carbon cycle Ecosystem model intercomparison Hauck, Judith Volker, Chrisoph Wolf-Gladrow, Dieter A. Laufkötter, Charlotte Vogt, Meike Aumont, Olivier Bopp, Laurent Buitenhuis, Erik T. Doney, Scott C. Dunne, John P. Gruber, Nicolas Hashioka, Taketo John, Jasmin G. Le Quere, Corinne Lima, Ivan D. Nakano, Hideyuki Seferian, Roland Totterdell, Ian J. On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century |
topic_facet |
Ocean carbon sink Export production CMIP5 Southern Annular Mode Polar carbon cycle Ecosystem model intercomparison |
description |
© The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Global Biogeochemical Cycles 29 (2015): 1451–1470, doi:10.1002/2015GB005140. We use a suite of eight ocean biogeochemical/ecological general circulation models from the Marine Ecosystem Model Intercomparison Project and Coupled Model Intercomparison Project Phase 5 archives to explore the relative roles of changes in winds (positive trend of Southern Annular Mode, SAM) and in warming- and freshening-driven trends of upper ocean stratification in altering export production and CO2 uptake in the Southern Ocean at the end of the 21st century. The investigated models simulate a broad range of responses to climate change, with no agreement on a dominance of either the SAM or the warming signal south of 44°S. In the southernmost zone, i.e., south of 58°S, they concur on an increase of biological export production, while between 44 and 58°S the models lack consensus on the sign of change in export. Yet in both regions, the models show an enhanced CO2 uptake during spring and summer. This is due to a larger CO2(aq) drawdown by the same amount of summer export production at a higher Revelle factor at the end of the 21st century. This strongly increases the importance of the biological carbon pump in the entire Southern Ocean. In the temperate zone, between 30 and 44°S, all models show a predominance of the warming signal and a nutrient-driven reduction of export production. As a consequence, the share of the regions south of 44°S to the total uptake of the Southern Ocean south of 30°S is projected to increase at the end of the 21st century from 47 to 66% with a commensurable decrease to the north. Despite this major reorganization of the meridional distribution of the major regions of uptake, the total uptake increases largely in line with the rising atmospheric CO2. Simulations with the MITgcm-REcoM2 model show that this is mostly driven by the strong increase of ... |
format |
Article in Journal/Newspaper |
author |
Hauck, Judith Volker, Chrisoph Wolf-Gladrow, Dieter A. Laufkötter, Charlotte Vogt, Meike Aumont, Olivier Bopp, Laurent Buitenhuis, Erik T. Doney, Scott C. Dunne, John P. Gruber, Nicolas Hashioka, Taketo John, Jasmin G. Le Quere, Corinne Lima, Ivan D. Nakano, Hideyuki Seferian, Roland Totterdell, Ian J. |
author_facet |
Hauck, Judith Volker, Chrisoph Wolf-Gladrow, Dieter A. Laufkötter, Charlotte Vogt, Meike Aumont, Olivier Bopp, Laurent Buitenhuis, Erik T. Doney, Scott C. Dunne, John P. Gruber, Nicolas Hashioka, Taketo John, Jasmin G. Le Quere, Corinne Lima, Ivan D. Nakano, Hideyuki Seferian, Roland Totterdell, Ian J. |
author_sort |
Hauck, Judith |
title |
On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century |
title_short |
On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century |
title_full |
On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century |
title_fullStr |
On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century |
title_full_unstemmed |
On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century |
title_sort |
on the southern ocean co2 uptake and the role of the biological carbon pump in the 21st century |
publisher |
John Wiley & Sons |
publishDate |
2015 |
url |
https://hdl.handle.net/1912/7656 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Global Biogeochemical Cycles 29 (2015): 1451–1470 doi:10.1002/2015GB005140 |
op_relation |
https://doi.org/10.1002/2015GB005140 Global Biogeochemical Cycles 29 (2015): 1451–1470 https://hdl.handle.net/1912/7656 doi:10.1002/2015GB005140 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1002/2015GB005140 |
container_title |
Global Biogeochemical Cycles |
container_volume |
29 |
container_issue |
9 |
container_start_page |
1451 |
op_container_end_page |
1470 |
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1766205927962181632 |