Response of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials
Atmospheric CO2 levels during interglacials prior to the Mid-Brunhes Event (MBE, ĝ1/4 ĝ€-430ĝ€-kaĝ€†BP) were around 40ĝ€-ppm lower than after the MBE. The reasons for this difference remain unclear. A recent hypothesis proposed that changes in oceanic circulation, in response to different external f...
Published in: | Climate of the Past |
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Language: | English |
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2018
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Online Access: | https://research.vu.nl/en/publications/d2b1293c-74be-43c2-828e-8b1be4bf7b27 https://doi.org/10.5194/cp-14-239-2018 https://hdl.handle.net/1871.1/d2b1293c-74be-43c2-828e-8b1be4bf7b27 http://www.scopus.com/inward/record.url?scp=85042850204&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85042850204&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/d2b1293c-74be-43c2-828e-8b1be4bf7b27 2024-10-13T14:08:00+00:00 Response of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials Bouttes, Nathaelle Swingedouw, Didier Roche, Didier M. Sanchez-Goni, Maria F. Crosta, Xavier 2018-03-02 https://research.vu.nl/en/publications/d2b1293c-74be-43c2-828e-8b1be4bf7b27 https://doi.org/10.5194/cp-14-239-2018 https://hdl.handle.net/1871.1/d2b1293c-74be-43c2-828e-8b1be4bf7b27 http://www.scopus.com/inward/record.url?scp=85042850204&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85042850204&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Bouttes , N , Swingedouw , D , Roche , D M , Sanchez-Goni , M F & Crosta , X 2018 , ' Response of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials ' , Climate of the Past , vol. 14 , no. 2 , pp. 239-253 . https://doi.org/10.5194/cp-14-239-2018 /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2018 ftvuamstcris https://doi.org/10.5194/cp-14-239-2018 2024-09-26T14:52:10Z Atmospheric CO2 levels during interglacials prior to the Mid-Brunhes Event (MBE, ĝ1/4 ĝ€-430ĝ€-kaĝ€†BP) were around 40ĝ€-ppm lower than after the MBE. The reasons for this difference remain unclear. A recent hypothesis proposed that changes in oceanic circulation, in response to different external forcings before and after the MBE, might have increased the ocean carbon storage in pre-MBE interglacials, thus lowering atmospheric CO2. Nevertheless, no quantitative estimate of this hypothesis has been produced up to now. Here we use an intermediate complexity model including the carbon cycle to evaluate the response of the carbon reservoirs in the atmosphere, ocean and land in response to the changes of orbital forcings, ice sheet configurations and atmospheric CO2 concentrations over the last nine interglacials. We show that the ocean takes up more carbon during pre-MBE interglacials in agreement with data, but the impact on atmospheric CO2 is limited to a few parts per million. Terrestrial biosphere is simulated to be less developed in pre-MBE interglacials, which reduces the storage of carbon on land and increases atmospheric CO2. Accounting for different simulated ice sheet extents modifies the vegetation cover and temperature, and thus the carbon reservoir distribution. Overall, atmospheric CO2 levels are lower during these pre-MBE simulated interglacials including all these effects, but the magnitude is still far too small. These results suggest a possible misrepresentation of some key processes in the model, such as the magnitude of ocean circulation changes, or the lack of crucial mechanisms or internal feedbacks, such as those related to permafrost, to fully account for the lower atmospheric CO2 concentrations during pre-MBE interglacials. Article in Journal/Newspaper Ice Ice Sheet permafrost Vrije Universiteit Amsterdam (VU): Research Portal Climate of the Past 14 2 239 253 |
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Vrije Universiteit Amsterdam (VU): Research Portal |
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English |
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/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Bouttes, Nathaelle Swingedouw, Didier Roche, Didier M. Sanchez-Goni, Maria F. Crosta, Xavier Response of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Atmospheric CO2 levels during interglacials prior to the Mid-Brunhes Event (MBE, ĝ1/4 ĝ€-430ĝ€-kaĝ€†BP) were around 40ĝ€-ppm lower than after the MBE. The reasons for this difference remain unclear. A recent hypothesis proposed that changes in oceanic circulation, in response to different external forcings before and after the MBE, might have increased the ocean carbon storage in pre-MBE interglacials, thus lowering atmospheric CO2. Nevertheless, no quantitative estimate of this hypothesis has been produced up to now. Here we use an intermediate complexity model including the carbon cycle to evaluate the response of the carbon reservoirs in the atmosphere, ocean and land in response to the changes of orbital forcings, ice sheet configurations and atmospheric CO2 concentrations over the last nine interglacials. We show that the ocean takes up more carbon during pre-MBE interglacials in agreement with data, but the impact on atmospheric CO2 is limited to a few parts per million. Terrestrial biosphere is simulated to be less developed in pre-MBE interglacials, which reduces the storage of carbon on land and increases atmospheric CO2. Accounting for different simulated ice sheet extents modifies the vegetation cover and temperature, and thus the carbon reservoir distribution. Overall, atmospheric CO2 levels are lower during these pre-MBE simulated interglacials including all these effects, but the magnitude is still far too small. These results suggest a possible misrepresentation of some key processes in the model, such as the magnitude of ocean circulation changes, or the lack of crucial mechanisms or internal feedbacks, such as those related to permafrost, to fully account for the lower atmospheric CO2 concentrations during pre-MBE interglacials. |
format |
Article in Journal/Newspaper |
author |
Bouttes, Nathaelle Swingedouw, Didier Roche, Didier M. Sanchez-Goni, Maria F. Crosta, Xavier |
author_facet |
Bouttes, Nathaelle Swingedouw, Didier Roche, Didier M. Sanchez-Goni, Maria F. Crosta, Xavier |
author_sort |
Bouttes, Nathaelle |
title |
Response of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials |
title_short |
Response of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials |
title_full |
Response of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials |
title_fullStr |
Response of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials |
title_full_unstemmed |
Response of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials |
title_sort |
response of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials |
publishDate |
2018 |
url |
https://research.vu.nl/en/publications/d2b1293c-74be-43c2-828e-8b1be4bf7b27 https://doi.org/10.5194/cp-14-239-2018 https://hdl.handle.net/1871.1/d2b1293c-74be-43c2-828e-8b1be4bf7b27 http://www.scopus.com/inward/record.url?scp=85042850204&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85042850204&partnerID=8YFLogxK |
genre |
Ice Ice Sheet permafrost |
genre_facet |
Ice Ice Sheet permafrost |
op_source |
Bouttes , N , Swingedouw , D , Roche , D M , Sanchez-Goni , M F & Crosta , X 2018 , ' Response of the carbon cycle in an intermediate complexity model to the different climate configurations of the last nine interglacials ' , Climate of the Past , vol. 14 , no. 2 , pp. 239-253 . https://doi.org/10.5194/cp-14-239-2018 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-14-239-2018 |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
2 |
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239 |
op_container_end_page |
253 |
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1812814574268710912 |