On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century, links to supplementary material
We use a suite of eight ocean biogeochemical/ecological general circulation models from the MAREMIP and CMIP5 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 alteri...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.849079 2023-05-15T18:24:55+02:00 On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century, links to supplementary material Hauck, Judith Völker, Christoph Wolf-Gladrow, Dieter A Laufkötter, Charlotte Vogt, Meike Aumont, Olivier Bopp, Laurent Buitenhuis, Erik Theodoor Doney, Scott C Dunne, John Gruber, Nicolas Hashioka, Taketo John, Jasmin Le Quéré, Corinne Lima, Ivan D Nakano, Hideyuki Séférian, Roland Totterdell, Ian J 2015-09-03 text/tab-separated-values, 27 data points https://doi.pangaea.de/10.1594/PANGAEA.849079 https://doi.org/10.1594/PANGAEA.849079 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.849079 https://doi.org/10.1594/PANGAEA.849079 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hauck, Judith; Völker, Christoph; Wolf-Gladrow, Dieter A; Laufkötter, Charlotte; Vogt, Meike; Aumont, Olivier; Bopp, Laurent; Buitenhuis, Erik Theodoor; Doney, Scott C; Dunne, John; Gruber, Nicolas; Hashioka, Taketo; John, Jasmin; Le Quéré, Corinne; Lima, Ivan D; Nakano, Hideyuki; Séférian, Roland; Totterdell, Ian J (2015): On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century. Global Biogeochemical Cycles, 29(9), 1451-1470, https://doi.org/10.1002/2015GB005140 File content Uniform resource locator/link to file Uniform resource locator/link to image Dataset 2015 ftpangaea https://doi.org/10.1594/PANGAEA.849079 https://doi.org/10.1002/2015GB005140 2023-01-20T09:06:16Z We use a suite of eight ocean biogeochemical/ecological general circulation models from the MAREMIP and CMIP5 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 ona 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 CO 2 (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 atmospheric CO2, with the climate-driven changes of natural CO2 exchange offsetting that trend only to a limited degree (~10%) and with negligible impact of climate effects on anthropogenic CO2 uptake when integrated over a full annual cycle south of 30° S. Dataset Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Southern Ocean |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
File content Uniform resource locator/link to file Uniform resource locator/link to image |
spellingShingle |
File content Uniform resource locator/link to file Uniform resource locator/link to image Hauck, Judith Völker, Christoph Wolf-Gladrow, Dieter A Laufkötter, Charlotte Vogt, Meike Aumont, Olivier Bopp, Laurent Buitenhuis, Erik Theodoor Doney, Scott C Dunne, John Gruber, Nicolas Hashioka, Taketo John, Jasmin Le Quéré, Corinne Lima, Ivan D Nakano, Hideyuki Séférian, Roland Totterdell, Ian J On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century, links to supplementary material |
topic_facet |
File content Uniform resource locator/link to file Uniform resource locator/link to image |
description |
We use a suite of eight ocean biogeochemical/ecological general circulation models from the MAREMIP and CMIP5 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 ona 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 CO 2 (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 atmospheric CO2, with the climate-driven changes of natural CO2 exchange offsetting that trend only to a limited degree (~10%) and with negligible impact of climate effects on anthropogenic CO2 uptake when integrated over a full annual cycle south of 30° S. |
format |
Dataset |
author |
Hauck, Judith Völker, Christoph Wolf-Gladrow, Dieter A Laufkötter, Charlotte Vogt, Meike Aumont, Olivier Bopp, Laurent Buitenhuis, Erik Theodoor Doney, Scott C Dunne, John Gruber, Nicolas Hashioka, Taketo John, Jasmin Le Quéré, Corinne Lima, Ivan D Nakano, Hideyuki Séférian, Roland Totterdell, Ian J |
author_facet |
Hauck, Judith Völker, Christoph Wolf-Gladrow, Dieter A Laufkötter, Charlotte Vogt, Meike Aumont, Olivier Bopp, Laurent Buitenhuis, Erik Theodoor Doney, Scott C Dunne, John Gruber, Nicolas Hashioka, Taketo John, Jasmin Le Quéré, Corinne Lima, Ivan D Nakano, Hideyuki Séférian, 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, links to supplementary material |
title_short |
On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century, links to supplementary material |
title_full |
On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century, links to supplementary material |
title_fullStr |
On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century, links to supplementary material |
title_full_unstemmed |
On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century, links to supplementary material |
title_sort |
on the southern ocean co2 uptake and the role of the biological carbon pump in the 21st century, links to supplementary material |
publisher |
PANGAEA |
publishDate |
2015 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.849079 https://doi.org/10.1594/PANGAEA.849079 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Supplement to: Hauck, Judith; Völker, Christoph; Wolf-Gladrow, Dieter A; Laufkötter, Charlotte; Vogt, Meike; Aumont, Olivier; Bopp, Laurent; Buitenhuis, Erik Theodoor; Doney, Scott C; Dunne, John; Gruber, Nicolas; Hashioka, Taketo; John, Jasmin; Le Quéré, Corinne; Lima, Ivan D; Nakano, Hideyuki; Séférian, Roland; Totterdell, Ian J (2015): On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century. Global Biogeochemical Cycles, 29(9), 1451-1470, https://doi.org/10.1002/2015GB005140 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.849079 https://doi.org/10.1594/PANGAEA.849079 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.849079 https://doi.org/10.1002/2015GB005140 |
_version_ |
1766205931711889408 |