Climate response to imposed solar radiation reductions in high latitudes
With human-induced climate change leading to amplified warming in high latitudes, mitigation alone is unlikely to be rapid enough to prevent significant, even irreversible, impacts. Model simulations in which solar insolation was arbitrarily reduced poleward of 51, 61, or 71° latitude in one or both...
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ftdoajarticles:oai:doaj.org/article:8b42262a18e545c690368dd13748b29c 2023-05-15T18:18:45+02:00 Climate response to imposed solar radiation reductions in high latitudes M. C. MacCracken H.-J. Shin K. Caldeira G. A. Ban-Weiss 2013-09-01T00:00:00Z https://doi.org/10.5194/esd-4-301-2013 https://doaj.org/article/8b42262a18e545c690368dd13748b29c EN eng Copernicus Publications http://www.earth-syst-dynam.net/4/301/2013/esd-4-301-2013.pdf https://doaj.org/toc/2190-4979 https://doaj.org/toc/2190-4987 2190-4979 2190-4987 doi:10.5194/esd-4-301-2013 https://doaj.org/article/8b42262a18e545c690368dd13748b29c Earth System Dynamics, Vol 4, Iss 2, Pp 301-315 (2013) Science Q Geology QE1-996.5 Dynamic and structural geology QE500-639.5 article 2013 ftdoajarticles https://doi.org/10.5194/esd-4-301-2013 2022-12-31T09:48:16Z With human-induced climate change leading to amplified warming in high latitudes, mitigation alone is unlikely to be rapid enough to prevent significant, even irreversible, impacts. Model simulations in which solar insolation was arbitrarily reduced poleward of 51, 61, or 71° latitude in one or both hemispheres not only cooled those regions, but also drew energy from lower latitudes, exerting a cooling influence over much of the particular hemisphere in which the reduction was imposed. The simulations, conducted using the National Center for Atmospheric Research's CAM3.1 atmospheric model coupled to a slab ocean, indicated that high-latitude reductions in absorbed solar radiation have a significantly larger cooling influence than solar reductions of equivalent magnitude spread evenly over the Earth. This amplified influence occurred primarily because concentrated high-latitude reductions in solar radiation led to increased sea ice fraction and surface albedo, thereby amplifying the energy deficit at the top of the atmosphere as compared to the response for an equivalent reduction in solar radiation spread evenly over the globe. Reductions in incoming solar radiation in one polar region (either north or south) resulted in increased poleward energy transport during that hemisphere's cold season and shifted the Inter-Tropical Convergence Zone (ITCZ) away from that pole, whereas comparable solar reductions in both polar regions resulted in increased poleward energy transport, but tended to leave the ITCZ approximately in place. Together, these results suggest that, until emissions reductions are sufficient to limit the warming influence of increasing greenhouse gas concentrations, polar reductions in solar radiation, if they could be efficiently and effectively implemented, warrant further research as an approach to moderating the early stages of both high-latitude and global warming. Article in Journal/Newspaper Sea ice Directory of Open Access Journals: DOAJ Articles Earth System Dynamics 4 2 301 315 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
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Science Q Geology QE1-996.5 Dynamic and structural geology QE500-639.5 |
spellingShingle |
Science Q Geology QE1-996.5 Dynamic and structural geology QE500-639.5 M. C. MacCracken H.-J. Shin K. Caldeira G. A. Ban-Weiss Climate response to imposed solar radiation reductions in high latitudes |
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Science Q Geology QE1-996.5 Dynamic and structural geology QE500-639.5 |
description |
With human-induced climate change leading to amplified warming in high latitudes, mitigation alone is unlikely to be rapid enough to prevent significant, even irreversible, impacts. Model simulations in which solar insolation was arbitrarily reduced poleward of 51, 61, or 71° latitude in one or both hemispheres not only cooled those regions, but also drew energy from lower latitudes, exerting a cooling influence over much of the particular hemisphere in which the reduction was imposed. The simulations, conducted using the National Center for Atmospheric Research's CAM3.1 atmospheric model coupled to a slab ocean, indicated that high-latitude reductions in absorbed solar radiation have a significantly larger cooling influence than solar reductions of equivalent magnitude spread evenly over the Earth. This amplified influence occurred primarily because concentrated high-latitude reductions in solar radiation led to increased sea ice fraction and surface albedo, thereby amplifying the energy deficit at the top of the atmosphere as compared to the response for an equivalent reduction in solar radiation spread evenly over the globe. Reductions in incoming solar radiation in one polar region (either north or south) resulted in increased poleward energy transport during that hemisphere's cold season and shifted the Inter-Tropical Convergence Zone (ITCZ) away from that pole, whereas comparable solar reductions in both polar regions resulted in increased poleward energy transport, but tended to leave the ITCZ approximately in place. Together, these results suggest that, until emissions reductions are sufficient to limit the warming influence of increasing greenhouse gas concentrations, polar reductions in solar radiation, if they could be efficiently and effectively implemented, warrant further research as an approach to moderating the early stages of both high-latitude and global warming. |
format |
Article in Journal/Newspaper |
author |
M. C. MacCracken H.-J. Shin K. Caldeira G. A. Ban-Weiss |
author_facet |
M. C. MacCracken H.-J. Shin K. Caldeira G. A. Ban-Weiss |
author_sort |
M. C. MacCracken |
title |
Climate response to imposed solar radiation reductions in high latitudes |
title_short |
Climate response to imposed solar radiation reductions in high latitudes |
title_full |
Climate response to imposed solar radiation reductions in high latitudes |
title_fullStr |
Climate response to imposed solar radiation reductions in high latitudes |
title_full_unstemmed |
Climate response to imposed solar radiation reductions in high latitudes |
title_sort |
climate response to imposed solar radiation reductions in high latitudes |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/esd-4-301-2013 https://doaj.org/article/8b42262a18e545c690368dd13748b29c |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Earth System Dynamics, Vol 4, Iss 2, Pp 301-315 (2013) |
op_relation |
http://www.earth-syst-dynam.net/4/301/2013/esd-4-301-2013.pdf https://doaj.org/toc/2190-4979 https://doaj.org/toc/2190-4987 2190-4979 2190-4987 doi:10.5194/esd-4-301-2013 https://doaj.org/article/8b42262a18e545c690368dd13748b29c |
op_doi |
https://doi.org/10.5194/esd-4-301-2013 |
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Earth System Dynamics |
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4 |
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301 |
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315 |
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