change and the carbon cycle?
Future climate change induced by atmospheric emissions of greenhouse gases is believed to have a large impact on the global carbon cycle. Several offline studies focusing either on the marine or on the terrestrial carbon cycle highlighted such potential effects. Two recent online studies, using ocea...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.506.836 2023-05-15T18:25:46+02:00 change and the carbon cycle? P. Friedlingstein J. -l. Dufresne P. M. Cox P. Rayner The Pennsylvania State University CiteSeerX Archives 2002 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.506.836 http://www.lmd.jussieu.fr/~jldufres/publi/2003/Friedlingstein.Dufresne.ea-tellus-2003.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.506.836 http://www.lmd.jussieu.fr/~jldufres/publi/2003/Friedlingstein.Dufresne.ea-tellus-2003.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.lmd.jussieu.fr/~jldufres/publi/2003/Friedlingstein.Dufresne.ea-tellus-2003.pdf text 2002 ftciteseerx 2016-01-08T09:24:56Z Future climate change induced by atmospheric emissions of greenhouse gases is believed to have a large impact on the global carbon cycle. Several offline studies focusing either on the marine or on the terrestrial carbon cycle highlighted such potential effects. Two recent online studies, using ocean–atmosphere general circulation models coupled to land and ocean carbon cycle models, in-vestigated in a consistent way the feedback between the climate change and the carbon cycle. These two studies used observed anthropogenic CO2 emissions for the 1860–1995 period and IPCC sce-narios for the 1995–2100 period to force the climate – carbon cycle models. The study from the Hadley Centre group showed a very large positive feedback, atmospheric CO2 reaching 980 ppmv by 2100 if future climate impacts on the carbon cycle, but only about 700 ppmv if the carbon cy-cle is included but assumed to be insensitive to the climate change. The IPSL coupled climate – carbon cycle model simulated a much smaller positive feedback: climate impact on the carbon cycle leads by 2100 to an addition of less than 100 ppmv in the atmosphere. Here we perform a detailed feedback analysis to show that such differences are due to two key processes that are still poorly constrained in these coupled models: first Southern Ocean circulation, which primarily controls the geochemical uptake of CO2, and second vegetation and soil carbon response to global warming. Our analytical analysis reproduces remarkably the results obtained by the fully coupled models. Also it allows us to identify that, amongst the two processes mentioned above, the latter (the land response to global warming) is the one that essentially explains the differences between the IPSL and the Hadley results. 1. Text Southern Ocean Unknown Southern Ocean |
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Future climate change induced by atmospheric emissions of greenhouse gases is believed to have a large impact on the global carbon cycle. Several offline studies focusing either on the marine or on the terrestrial carbon cycle highlighted such potential effects. Two recent online studies, using ocean–atmosphere general circulation models coupled to land and ocean carbon cycle models, in-vestigated in a consistent way the feedback between the climate change and the carbon cycle. These two studies used observed anthropogenic CO2 emissions for the 1860–1995 period and IPCC sce-narios for the 1995–2100 period to force the climate – carbon cycle models. The study from the Hadley Centre group showed a very large positive feedback, atmospheric CO2 reaching 980 ppmv by 2100 if future climate impacts on the carbon cycle, but only about 700 ppmv if the carbon cy-cle is included but assumed to be insensitive to the climate change. The IPSL coupled climate – carbon cycle model simulated a much smaller positive feedback: climate impact on the carbon cycle leads by 2100 to an addition of less than 100 ppmv in the atmosphere. Here we perform a detailed feedback analysis to show that such differences are due to two key processes that are still poorly constrained in these coupled models: first Southern Ocean circulation, which primarily controls the geochemical uptake of CO2, and second vegetation and soil carbon response to global warming. Our analytical analysis reproduces remarkably the results obtained by the fully coupled models. Also it allows us to identify that, amongst the two processes mentioned above, the latter (the land response to global warming) is the one that essentially explains the differences between the IPSL and the Hadley results. 1. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
P. Friedlingstein J. -l. Dufresne P. M. Cox P. Rayner |
spellingShingle |
P. Friedlingstein J. -l. Dufresne P. M. Cox P. Rayner change and the carbon cycle? |
author_facet |
P. Friedlingstein J. -l. Dufresne P. M. Cox P. Rayner |
author_sort |
P. Friedlingstein |
title |
change and the carbon cycle? |
title_short |
change and the carbon cycle? |
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change and the carbon cycle? |
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change and the carbon cycle? |
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change and the carbon cycle? |
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change and the carbon cycle? |
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2002 |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.506.836 http://www.lmd.jussieu.fr/~jldufres/publi/2003/Friedlingstein.Dufresne.ea-tellus-2003.pdf |
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Southern Ocean |
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Southern Ocean |
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Southern Ocean |
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http://www.lmd.jussieu.fr/~jldufres/publi/2003/Friedlingstein.Dufresne.ea-tellus-2003.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.506.836 http://www.lmd.jussieu.fr/~jldufres/publi/2003/Friedlingstein.Dufresne.ea-tellus-2003.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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