A multi-model study on the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century
The Southern Ocean is one of the key regions for global carbon uptake and it is under discussion how physical changes will alter its CO2 balance both directly and indirectly through changes in biological production. Here we analyse a suite of eight RCP8.5 model simulations until 2100 from the MAREMI...
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EGU General Assembly 2015
2015
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ftawi:oai:epic.awi.de:37831 2024-09-15T18:37:01+00:00 A multi-model study on the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century Hauck, Judith Völker, Christoph Wolf-Gladrow, Dieter Laufkötter, Charlotte Vogt, Meike Aumont, Olivier Bopp, Laurent Buitenhuis, Erik Doney, Scott Dunne, John Gruber, Nicolas Hashioka, Taketo John, Jasmin Le Quéré, Corinne Lima, Ivan Nakano, Hideyuki Séférian, Roland Totterdell, Ian 2015-04-16 application/pdf https://epic.awi.de/id/eprint/37831/ https://epic.awi.de/id/eprint/37831/1/EGU2015-12225.pdf https://hdl.handle.net/10013/epic.45429 https://hdl.handle.net/10013/epic.45429.d001 unknown EGU General Assembly 2015 https://epic.awi.de/id/eprint/37831/1/EGU2015-12225.pdf https://hdl.handle.net/10013/epic.45429.d001 Hauck, J. orcid:0000-0003-4723-9652 , Völker, C. orcid:0000-0003-3032-114X , Wolf-Gladrow, D. orcid:0000-0001-9531-8668 , Laufkötter, C. , Vogt, M. , Aumont, O. , Bopp, L. , Buitenhuis, E. , Doney, S. , Dunne, J. , Gruber, N. , Hashioka, T. , John, J. , Le Quéré, C. , Lima, I. , Nakano, H. , Séférian, R. and Totterdell, I. (2015) A multi-model study on the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century , EGU General Assembly 2015, Vienna, 12 April 2015 - 17 April 2015 . hdl:10013/epic.45429 EPIC3EGU General Assembly 2015, Vienna, 2015-04-12-2015-04-17Vienna, EGU General Assembly 2015 Conference notRev 2015 ftawi 2024-06-24T04:12:21Z The Southern Ocean is one of the key regions for global carbon uptake and it is under discussion how physical changes will alter its CO2 balance both directly and indirectly through changes in biological production. Here we analyse a suite of eight RCP8.5 model simulations until 2100 from the MAREMIP and CMIP5 model intercomparison projects on changes in export production and CO2 uptake. We explore how the counter-acting effects of stronger winds ("SAM signal", less stratification) and global warming (more stratification) affect CO2 fluxes in different models and different regions of the Southern Ocean. The models simulate a broad range of responses with no agreement on the dominance of the SAM or global warming signal or on nutrient or light as the dominant drivers for changes in export production. There is agreement on an increase in export production south of 58◦S and on a nutrient-driven decrease of export production in the region 30-44◦S (global warming signal). Based on a box-model, we can identify the most important drivers for the future CO2 uptake in the Southern Ocean where the pure increase of atmospheric CO2 has the largest effect, followed by the enhanced biological production and the larger effect of biological production on CO2 uptake at higher Revelle factor. The enhanced upwelling of carbon-rich deep water, and the effects of warming on the CO2 solubility and faster gas-exchange at higher wind-speeds are less important. Conference Object Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The Southern Ocean is one of the key regions for global carbon uptake and it is under discussion how physical changes will alter its CO2 balance both directly and indirectly through changes in biological production. Here we analyse a suite of eight RCP8.5 model simulations until 2100 from the MAREMIP and CMIP5 model intercomparison projects on changes in export production and CO2 uptake. We explore how the counter-acting effects of stronger winds ("SAM signal", less stratification) and global warming (more stratification) affect CO2 fluxes in different models and different regions of the Southern Ocean. The models simulate a broad range of responses with no agreement on the dominance of the SAM or global warming signal or on nutrient or light as the dominant drivers for changes in export production. There is agreement on an increase in export production south of 58◦S and on a nutrient-driven decrease of export production in the region 30-44◦S (global warming signal). Based on a box-model, we can identify the most important drivers for the future CO2 uptake in the Southern Ocean where the pure increase of atmospheric CO2 has the largest effect, followed by the enhanced biological production and the larger effect of biological production on CO2 uptake at higher Revelle factor. The enhanced upwelling of carbon-rich deep water, and the effects of warming on the CO2 solubility and faster gas-exchange at higher wind-speeds are less important. |
format |
Conference Object |
author |
Hauck, Judith Völker, Christoph Wolf-Gladrow, Dieter Laufkötter, Charlotte Vogt, Meike Aumont, Olivier Bopp, Laurent Buitenhuis, Erik Doney, Scott Dunne, John Gruber, Nicolas Hashioka, Taketo John, Jasmin Le Quéré, Corinne Lima, Ivan Nakano, Hideyuki Séférian, Roland Totterdell, Ian |
spellingShingle |
Hauck, Judith Völker, Christoph Wolf-Gladrow, Dieter Laufkötter, Charlotte Vogt, Meike Aumont, Olivier Bopp, Laurent Buitenhuis, Erik Doney, Scott Dunne, John Gruber, Nicolas Hashioka, Taketo John, Jasmin Le Quéré, Corinne Lima, Ivan Nakano, Hideyuki Séférian, Roland Totterdell, Ian A multi-model study on the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century |
author_facet |
Hauck, Judith Völker, Christoph Wolf-Gladrow, Dieter Laufkötter, Charlotte Vogt, Meike Aumont, Olivier Bopp, Laurent Buitenhuis, Erik Doney, Scott Dunne, John Gruber, Nicolas Hashioka, Taketo John, Jasmin Le Quéré, Corinne Lima, Ivan Nakano, Hideyuki Séférian, Roland Totterdell, Ian |
author_sort |
Hauck, Judith |
title |
A multi-model study on the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century |
title_short |
A multi-model study on the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century |
title_full |
A multi-model study on the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century |
title_fullStr |
A multi-model study on the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century |
title_full_unstemmed |
A multi-model study on the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century |
title_sort |
multi-model study on the southern ocean co2 uptake and the role of the biological carbon pump in the 21st century |
publisher |
EGU General Assembly 2015 |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/37831/ https://epic.awi.de/id/eprint/37831/1/EGU2015-12225.pdf https://hdl.handle.net/10013/epic.45429 https://hdl.handle.net/10013/epic.45429.d001 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
EPIC3EGU General Assembly 2015, Vienna, 2015-04-12-2015-04-17Vienna, EGU General Assembly 2015 |
op_relation |
https://epic.awi.de/id/eprint/37831/1/EGU2015-12225.pdf https://hdl.handle.net/10013/epic.45429.d001 Hauck, J. orcid:0000-0003-4723-9652 , Völker, C. orcid:0000-0003-3032-114X , Wolf-Gladrow, D. orcid:0000-0001-9531-8668 , Laufkötter, C. , Vogt, M. , Aumont, O. , Bopp, L. , Buitenhuis, E. , Doney, S. , Dunne, J. , Gruber, N. , Hashioka, T. , John, J. , Le Quéré, C. , Lima, I. , Nakano, H. , Séférian, R. and Totterdell, I. (2015) A multi-model study on the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century , EGU General Assembly 2015, Vienna, 12 April 2015 - 17 April 2015 . hdl:10013/epic.45429 |
_version_ |
1810481069650083840 |