Response of air‐sea carbon fluxes and climate to orbital forcing changes in the Community Climate System Model
[1] A global general circulation model coupled to an ocean ecosystem model is used to quantify the response of carbon fluxes and climate to changes in orbital forcing. Compared to the present‐day simulation, the simulation with the Earth’s orbital parameters from 115,000 years ago features significa...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.225.8566 2023-05-15T15:07:29+02:00 Response of air‐sea carbon fluxes and climate to orbital forcing changes in the Community Climate System Model M. Jochum S. Peacock K. Moore K. Lindsay The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.225.8566 http://www.cgd.ucar.edu/oce/markus/2009PA001856.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.225.8566 http://www.cgd.ucar.edu/oce/markus/2009PA001856.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cgd.ucar.edu/oce/markus/2009PA001856.pdf text ftciteseerx 2016-01-07T18:29:40Z [1] A global general circulation model coupled to an ocean ecosystem model is used to quantify the response of carbon fluxes and climate to changes in orbital forcing. Compared to the present‐day simulation, the simulation with the Earth’s orbital parameters from 115,000 years ago features significantly cooler northern high latitudes but only moderately cooler southern high latitudes. This asymmetry is explained by a 30 % reduction of the strength of the Atlantic Meridional Overturning Circulation that is caused by an increased Arctic sea ice export and a resulting fresheningoftheNorthAtlantic.Thestrongnorthernhigh‐latitude cooling and the direct insolation induced tropical warming lead to global shifts in precipitation and winds to the order of 10%–20%. These climate shifts lead to regional differences in air‐sea carbon fluxes of the same order. However, the differences in global net air‐sea carbon fluxes are small, which is due to several effects, two of which stand out: first, colder sea surface temperature leads to a more effective solubility pump but also to increased sea ice concentration which blocks air‐sea exchange, and second, the weakening of Southern Ocean winds that is predicted by some idealized studies occurs only in part of the basin, and is compensated by stronger winds in other parts. Text Arctic Sea ice Southern Ocean Unknown Arctic Southern Ocean |
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description |
[1] A global general circulation model coupled to an ocean ecosystem model is used to quantify the response of carbon fluxes and climate to changes in orbital forcing. Compared to the present‐day simulation, the simulation with the Earth’s orbital parameters from 115,000 years ago features significantly cooler northern high latitudes but only moderately cooler southern high latitudes. This asymmetry is explained by a 30 % reduction of the strength of the Atlantic Meridional Overturning Circulation that is caused by an increased Arctic sea ice export and a resulting fresheningoftheNorthAtlantic.Thestrongnorthernhigh‐latitude cooling and the direct insolation induced tropical warming lead to global shifts in precipitation and winds to the order of 10%–20%. These climate shifts lead to regional differences in air‐sea carbon fluxes of the same order. However, the differences in global net air‐sea carbon fluxes are small, which is due to several effects, two of which stand out: first, colder sea surface temperature leads to a more effective solubility pump but also to increased sea ice concentration which blocks air‐sea exchange, and second, the weakening of Southern Ocean winds that is predicted by some idealized studies occurs only in part of the basin, and is compensated by stronger winds in other parts. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
M. Jochum S. Peacock K. Moore K. Lindsay |
spellingShingle |
M. Jochum S. Peacock K. Moore K. Lindsay Response of air‐sea carbon fluxes and climate to orbital forcing changes in the Community Climate System Model |
author_facet |
M. Jochum S. Peacock K. Moore K. Lindsay |
author_sort |
M. Jochum |
title |
Response of air‐sea carbon fluxes and climate to orbital forcing changes in the Community Climate System Model |
title_short |
Response of air‐sea carbon fluxes and climate to orbital forcing changes in the Community Climate System Model |
title_full |
Response of air‐sea carbon fluxes and climate to orbital forcing changes in the Community Climate System Model |
title_fullStr |
Response of air‐sea carbon fluxes and climate to orbital forcing changes in the Community Climate System Model |
title_full_unstemmed |
Response of air‐sea carbon fluxes and climate to orbital forcing changes in the Community Climate System Model |
title_sort |
response of air‐sea carbon fluxes and climate to orbital forcing changes in the community climate system model |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.225.8566 http://www.cgd.ucar.edu/oce/markus/2009PA001856.pdf |
geographic |
Arctic Southern Ocean |
geographic_facet |
Arctic Southern Ocean |
genre |
Arctic Sea ice Southern Ocean |
genre_facet |
Arctic Sea ice Southern Ocean |
op_source |
http://www.cgd.ucar.edu/oce/markus/2009PA001856.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.225.8566 http://www.cgd.ucar.edu/oce/markus/2009PA001856.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766338979204956160 |