Climate model response from the Geoengineering Model
[1] Solar geoengineering—deliberate reduction in the amount of solar radiation retained by the Earth—has been proposed as a means of counteracting some of the climatic effects of anthropogenic greenhouse gas emissions. We present results from Experiment G1 of the Geoengineering Model Intercomparison...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1030.5137 2023-05-15T15:07:27+02:00 Climate model response from the Geoengineering Model The Pennsylvania State University CiteSeerX Archives 2013 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1030.5137 http://kaares.ulapland.fi/home/hkunta/jmoore/pdfs/kravitz_jgrd50646.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1030.5137 http://kaares.ulapland.fi/home/hkunta/jmoore/pdfs/kravitz_jgrd50646.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://kaares.ulapland.fi/home/hkunta/jmoore/pdfs/kravitz_jgrd50646.pdf text 2013 ftciteseerx 2016-10-30T00:11:42Z [1] Solar geoengineering—deliberate reduction in the amount of solar radiation retained by the Earth—has been proposed as a means of counteracting some of the climatic effects of anthropogenic greenhouse gas emissions. We present results from Experiment G1 of the Geoengineering Model Intercomparison Project, in which 12 climate models have simulated the climate response to an abrupt quadrupling of CO2 from preindustrial concentrations brought into radiative balance via a globally uniform reduction in insolation. Models show this reduction largely offsets global mean surface temperature increases due to quadrupled CO2 concentrations and prevents 97 % of the Arctic sea ice loss that would otherwise occur under high CO2 levels but, compared to the preindustrial climate, leaves the tropics cooler (0.3K) and the poles warmer (+0.8K). Annual mean precipitation minus evaporation anomalies for G1 are less than 0.2mmday1 in magnitude over 92 % of the globe, but some tropical regions receive less precipitation, in part due to increased moist static stability and suppression of convection. Global average net primary productivity increases by 120 % in G1 over simulated preindustrial levels, primarily from CO2 fertilization, but also in part due to reduced plant heat stress compared to a high CO2 world with no geoengineering. All models show that uniform solar geoengineering in G1 cannot simultaneously return regional and global temperature and hydrologic cycle intensity to preindustrial levels. Text Arctic Sea ice Unknown Arctic |
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[1] Solar geoengineering—deliberate reduction in the amount of solar radiation retained by the Earth—has been proposed as a means of counteracting some of the climatic effects of anthropogenic greenhouse gas emissions. We present results from Experiment G1 of the Geoengineering Model Intercomparison Project, in which 12 climate models have simulated the climate response to an abrupt quadrupling of CO2 from preindustrial concentrations brought into radiative balance via a globally uniform reduction in insolation. Models show this reduction largely offsets global mean surface temperature increases due to quadrupled CO2 concentrations and prevents 97 % of the Arctic sea ice loss that would otherwise occur under high CO2 levels but, compared to the preindustrial climate, leaves the tropics cooler (0.3K) and the poles warmer (+0.8K). Annual mean precipitation minus evaporation anomalies for G1 are less than 0.2mmday1 in magnitude over 92 % of the globe, but some tropical regions receive less precipitation, in part due to increased moist static stability and suppression of convection. Global average net primary productivity increases by 120 % in G1 over simulated preindustrial levels, primarily from CO2 fertilization, but also in part due to reduced plant heat stress compared to a high CO2 world with no geoengineering. All models show that uniform solar geoengineering in G1 cannot simultaneously return regional and global temperature and hydrologic cycle intensity to preindustrial levels. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
title |
Climate model response from the Geoengineering Model |
spellingShingle |
Climate model response from the Geoengineering Model |
title_short |
Climate model response from the Geoengineering Model |
title_full |
Climate model response from the Geoengineering Model |
title_fullStr |
Climate model response from the Geoengineering Model |
title_full_unstemmed |
Climate model response from the Geoengineering Model |
title_sort |
climate model response from the geoengineering model |
publishDate |
2013 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1030.5137 http://kaares.ulapland.fi/home/hkunta/jmoore/pdfs/kravitz_jgrd50646.pdf |
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Arctic |
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Arctic |
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Arctic Sea ice |
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Arctic Sea ice |
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http://kaares.ulapland.fi/home/hkunta/jmoore/pdfs/kravitz_jgrd50646.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1030.5137 http://kaares.ulapland.fi/home/hkunta/jmoore/pdfs/kravitz_jgrd50646.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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