Spatial distribution of air-sea CO 2 fluxes and the interhemispheric transport of carbon by the oceans
International audience The dominant processes controlling the magnitude and spatial distribution of the preindustrial air-sea flux of CO2 are atmosphere-ocean heat exchange and the biological pump, coupled with the direct influence of ocean circulation resulting from the slow timescale of air-sea CO...
Published in: | Global Biogeochemical Cycles |
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Online Access: | https://hal.science/hal-03120937 https://hal.science/hal-03120937/document https://hal.science/hal-03120937/file/1998GB900009.pdf https://doi.org/10.1029/1998GB900009 |
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ftuniversailles:oai:HAL:hal-03120937v1 2024-04-28T08:39:35+00:00 Spatial distribution of air-sea CO 2 fluxes and the interhemispheric transport of carbon by the oceans Murnane, R. Sarmiento, J. Le Quéré, C. Princeton University Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) 1999 https://hal.science/hal-03120937 https://hal.science/hal-03120937/document https://hal.science/hal-03120937/file/1998GB900009.pdf https://doi.org/10.1029/1998GB900009 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/1998GB900009 hal-03120937 https://hal.science/hal-03120937 https://hal.science/hal-03120937/document https://hal.science/hal-03120937/file/1998GB900009.pdf doi:10.1029/1998GB900009 info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-03120937 Global Biogeochemical Cycles, 1999, 13 (2), pp.287-305. ⟨10.1029/1998GB900009⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 1999 ftuniversailles https://doi.org/10.1029/1998GB900009 2024-04-04T17:35:12Z International audience The dominant processes controlling the magnitude and spatial distribution of the preindustrial air-sea flux of CO2 are atmosphere-ocean heat exchange and the biological pump, coupled with the direct influence of ocean circulation resulting from the slow timescale of air-sea CO2 gas exchange equilibration. The influence of the biological pump is greatest in surface outcrops of deep water, where the excess deep ocean carbon resulting from net remineralization can escape to the atmosphere. In a steady state other regions compensate for this loss by taking up CO2 to give a global net air-sea CO2 flux of zero. The predominant outcrop region is the Southern Ocean, where the loss to the atmosphere of biological pump CO2 is large enough to cancel the gain of CO 2 due to cooling. The influence of the biological pump on uptake of anthropogenic CO2 is small: a model including biology takes up 4.9% less than a model without it. Our model does not predict the large southward interhemispheric transport of CO2 that has been suggested by atmospheric carbon transport constraints. Article in Journal/Newspaper Southern Ocean Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Global Biogeochemical Cycles 13 2 287 305 |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Murnane, R. Sarmiento, J. Le Quéré, C. Spatial distribution of air-sea CO 2 fluxes and the interhemispheric transport of carbon by the oceans |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The dominant processes controlling the magnitude and spatial distribution of the preindustrial air-sea flux of CO2 are atmosphere-ocean heat exchange and the biological pump, coupled with the direct influence of ocean circulation resulting from the slow timescale of air-sea CO2 gas exchange equilibration. The influence of the biological pump is greatest in surface outcrops of deep water, where the excess deep ocean carbon resulting from net remineralization can escape to the atmosphere. In a steady state other regions compensate for this loss by taking up CO2 to give a global net air-sea CO2 flux of zero. The predominant outcrop region is the Southern Ocean, where the loss to the atmosphere of biological pump CO2 is large enough to cancel the gain of CO 2 due to cooling. The influence of the biological pump on uptake of anthropogenic CO2 is small: a model including biology takes up 4.9% less than a model without it. Our model does not predict the large southward interhemispheric transport of CO2 that has been suggested by atmospheric carbon transport constraints. |
author2 |
Princeton University Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
format |
Article in Journal/Newspaper |
author |
Murnane, R. Sarmiento, J. Le Quéré, C. |
author_facet |
Murnane, R. Sarmiento, J. Le Quéré, C. |
author_sort |
Murnane, R. |
title |
Spatial distribution of air-sea CO 2 fluxes and the interhemispheric transport of carbon by the oceans |
title_short |
Spatial distribution of air-sea CO 2 fluxes and the interhemispheric transport of carbon by the oceans |
title_full |
Spatial distribution of air-sea CO 2 fluxes and the interhemispheric transport of carbon by the oceans |
title_fullStr |
Spatial distribution of air-sea CO 2 fluxes and the interhemispheric transport of carbon by the oceans |
title_full_unstemmed |
Spatial distribution of air-sea CO 2 fluxes and the interhemispheric transport of carbon by the oceans |
title_sort |
spatial distribution of air-sea co 2 fluxes and the interhemispheric transport of carbon by the oceans |
publisher |
HAL CCSD |
publishDate |
1999 |
url |
https://hal.science/hal-03120937 https://hal.science/hal-03120937/document https://hal.science/hal-03120937/file/1998GB900009.pdf https://doi.org/10.1029/1998GB900009 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-03120937 Global Biogeochemical Cycles, 1999, 13 (2), pp.287-305. ⟨10.1029/1998GB900009⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/1998GB900009 hal-03120937 https://hal.science/hal-03120937 https://hal.science/hal-03120937/document https://hal.science/hal-03120937/file/1998GB900009.pdf doi:10.1029/1998GB900009 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/1998GB900009 |
container_title |
Global Biogeochemical Cycles |
container_volume |
13 |
container_issue |
2 |
container_start_page |
287 |
op_container_end_page |
305 |
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1797570548680622080 |