Fingerprints of changes in the terrestrial carbon cycle in response to large reorganizations in ocean circulation
CO2 and carbon cycle changes in the land, ocean and atmosphere are investigated using the comprehensive carbon cycle-climate model NCAR CSM1.4-carbon. Ensemble simulations are forced with freshwater perturbations applied at the North Atlantic and Southern Ocean deep water formation sites under pre-i...
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Online Access: | https://doi.org/10.5194/cp-7-319-2011 http://www.clim-past.net/7/319/2011/cp-7-319-2011.pdf https://doaj.org/article/059b7fbca15e4fa7976e29d113dde156 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:059b7fbca15e4fa7976e29d113dde156 2023-05-15T17:29:41+02:00 Fingerprints of changes in the terrestrial carbon cycle in response to large reorganizations in ocean circulation A. Bozbiyik M. Steinacher F. Joos T. F. Stocker L. Menviel 2011-03-01 https://doi.org/10.5194/cp-7-319-2011 http://www.clim-past.net/7/319/2011/cp-7-319-2011.pdf https://doaj.org/article/059b7fbca15e4fa7976e29d113dde156 en eng Copernicus Publications doi:10.5194/cp-7-319-2011 1814-9324 1814-9332 http://www.clim-past.net/7/319/2011/cp-7-319-2011.pdf https://doaj.org/article/059b7fbca15e4fa7976e29d113dde156 undefined Climate of the Past, Vol 7, Iss 1, Pp 319-338 (2011) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2011 fttriple https://doi.org/10.5194/cp-7-319-2011 2023-01-22T17:50:52Z CO2 and carbon cycle changes in the land, ocean and atmosphere are investigated using the comprehensive carbon cycle-climate model NCAR CSM1.4-carbon. Ensemble simulations are forced with freshwater perturbations applied at the North Atlantic and Southern Ocean deep water formation sites under pre-industrial climate conditions. As a result, the Atlantic Meridional Overturning Circulation reduces in each experiment to varying degrees. The physical climate fields show changes qualitatively in agreement with results documented in the literature, but there is a clear distinction between northern and southern perturbations. Changes in the physical variables, in turn, affect the land and ocean biogeochemical cycles and cause a reduction, or an increase, in the atmospheric CO2 concentration by up to 20 ppmv, depending on the location of the perturbation. In the case of a North Atlantic perturbation, the land biosphere reacts with a strong reduction in carbon stocks in some tropical locations and in high northern latitudes. In contrast, land carbon stocks tend to increase in response to a southern perturbation. The ocean is generally a sink of carbon although large reorganizations occur throughout various basins. The response of the land biosphere is strongest in the tropical regions due to a shift of the Intertropical Convergence Zone. The carbon fingerprints of this shift, either to the south or to the north depending on where the freshwater is applied, can be found most clearly in South America. For this reason, a compilation of various paleoclimate proxy records of Younger Dryas precipitation changes are compared with our model results. The proxy records, in general, show good agreement with the model's response to a North Atlantic freshwater perturbation. Article in Journal/Newspaper North Atlantic Southern Ocean Unknown Southern Ocean Climate of the Past 7 1 319 338 |
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English |
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envir geo A. Bozbiyik M. Steinacher F. Joos T. F. Stocker L. Menviel Fingerprints of changes in the terrestrial carbon cycle in response to large reorganizations in ocean circulation |
topic_facet |
envir geo |
description |
CO2 and carbon cycle changes in the land, ocean and atmosphere are investigated using the comprehensive carbon cycle-climate model NCAR CSM1.4-carbon. Ensemble simulations are forced with freshwater perturbations applied at the North Atlantic and Southern Ocean deep water formation sites under pre-industrial climate conditions. As a result, the Atlantic Meridional Overturning Circulation reduces in each experiment to varying degrees. The physical climate fields show changes qualitatively in agreement with results documented in the literature, but there is a clear distinction between northern and southern perturbations. Changes in the physical variables, in turn, affect the land and ocean biogeochemical cycles and cause a reduction, or an increase, in the atmospheric CO2 concentration by up to 20 ppmv, depending on the location of the perturbation. In the case of a North Atlantic perturbation, the land biosphere reacts with a strong reduction in carbon stocks in some tropical locations and in high northern latitudes. In contrast, land carbon stocks tend to increase in response to a southern perturbation. The ocean is generally a sink of carbon although large reorganizations occur throughout various basins. The response of the land biosphere is strongest in the tropical regions due to a shift of the Intertropical Convergence Zone. The carbon fingerprints of this shift, either to the south or to the north depending on where the freshwater is applied, can be found most clearly in South America. For this reason, a compilation of various paleoclimate proxy records of Younger Dryas precipitation changes are compared with our model results. The proxy records, in general, show good agreement with the model's response to a North Atlantic freshwater perturbation. |
format |
Article in Journal/Newspaper |
author |
A. Bozbiyik M. Steinacher F. Joos T. F. Stocker L. Menviel |
author_facet |
A. Bozbiyik M. Steinacher F. Joos T. F. Stocker L. Menviel |
author_sort |
A. Bozbiyik |
title |
Fingerprints of changes in the terrestrial carbon cycle in response to large reorganizations in ocean circulation |
title_short |
Fingerprints of changes in the terrestrial carbon cycle in response to large reorganizations in ocean circulation |
title_full |
Fingerprints of changes in the terrestrial carbon cycle in response to large reorganizations in ocean circulation |
title_fullStr |
Fingerprints of changes in the terrestrial carbon cycle in response to large reorganizations in ocean circulation |
title_full_unstemmed |
Fingerprints of changes in the terrestrial carbon cycle in response to large reorganizations in ocean circulation |
title_sort |
fingerprints of changes in the terrestrial carbon cycle in response to large reorganizations in ocean circulation |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/cp-7-319-2011 http://www.clim-past.net/7/319/2011/cp-7-319-2011.pdf https://doaj.org/article/059b7fbca15e4fa7976e29d113dde156 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
Climate of the Past, Vol 7, Iss 1, Pp 319-338 (2011) |
op_relation |
doi:10.5194/cp-7-319-2011 1814-9324 1814-9332 http://www.clim-past.net/7/319/2011/cp-7-319-2011.pdf https://doaj.org/article/059b7fbca15e4fa7976e29d113dde156 |
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undefined |
op_doi |
https://doi.org/10.5194/cp-7-319-2011 |
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Climate of the Past |
container_volume |
7 |
container_issue |
1 |
container_start_page |
319 |
op_container_end_page |
338 |
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