Climate sensitivity in the anthropocene
Climate sensitivity in its most basic form is defined as the equilibrium change in global surface temperature that occurs in response to a climate forcing, or externally imposed perturbation of the planetary energy balance. Within this general definition, several specific forms of climate sensitivit...
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:47460 2023-05-15T16:40:30+02:00 Climate sensitivity in the anthropocene Previdi, M. Liepert, B.G. Peteet, D. Hansen, J. Beerling, D.J. Broccoli, A.J. Frolking, S. Galloway, J.N. Heimann, M. Le Quéré, C. Levitus, S. Ramaswamy, V. 2013-07-01 https://ueaeprints.uea.ac.uk/id/eprint/47460/ https://doi.org/10.1002/qj.2165 unknown Previdi, M., Liepert, B.G., Peteet, D., Hansen, J., Beerling, D.J., Broccoli, A.J., Frolking, S., Galloway, J.N., Heimann, M., Le Quéré, C., Levitus, S. and Ramaswamy, V. (2013) Climate sensitivity in the anthropocene. Quarterly Journal of the Royal Meteorological Society, 139 (674). pp. 1121-1131. ISSN 0035-9009 doi:10.1002/qj.2165 Article PeerReviewed 2013 ftuniveastangl https://doi.org/10.1002/qj.2165 2023-03-23T23:32:01Z Climate sensitivity in its most basic form is defined as the equilibrium change in global surface temperature that occurs in response to a climate forcing, or externally imposed perturbation of the planetary energy balance. Within this general definition, several specific forms of climate sensitivity exist that differ in terms of the types of climate feedbacks they include. Based on evidence from Earth's history, we suggest here that the relevant form of climate sensitivity in the Anthropocene (e.g. from which to base future greenhouse gas (GHG) stabilization targets) is the Earth system sensitivity including fast feedbacks from changes in water vapour, natural aerosols, clouds and sea ice, slower surface albedo feedbacks from changes in continental ice sheets and vegetation, and climate-GHG feedbacks from changes in natural (land and ocean) carbon sinks. Traditionally, only fast feedbacks have been considered (with the other feedbacks either ignored or treated as forcing), which has led to estimates of the climate sensitivity for doubled CO concentrations of about 3°C. The 2×CO Earth system sensitivity is higher than this, being ~4-6°C if the ice sheet/vegetation albedo feedback is included in addition to the fast feedbacks, and higher still if climate-GHG feedbacks are also included. The inclusion of climate-GHG feedbacks due to changes in the natural carbon sinks has the advantage of more directly linking anthropogenic GHG emissions with the ensuing global temperature increase, thus providing a truer indication of the climate sensitivity to human perturbations. The Earth system climate sensitivity is difficult to quantify due to the lack of palaeo-analogues for the present-day anthropogenic forcing, and the fact that ice sheet and climate-GHG feedbacks have yet to become globally significant in the Anthropocene. Furthermore, current models are unable to adequately simulate the physics of ice sheet decay and certain aspects of the natural carbon and nitrogen cycles. Obtaining quantitative estimates of the ... Article in Journal/Newspaper Ice Sheet Sea ice University of East Anglia: UEA Digital Repository Quarterly Journal of the Royal Meteorological Society 139 674 1121 1131 |
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University of East Anglia: UEA Digital Repository |
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ftuniveastangl |
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description |
Climate sensitivity in its most basic form is defined as the equilibrium change in global surface temperature that occurs in response to a climate forcing, or externally imposed perturbation of the planetary energy balance. Within this general definition, several specific forms of climate sensitivity exist that differ in terms of the types of climate feedbacks they include. Based on evidence from Earth's history, we suggest here that the relevant form of climate sensitivity in the Anthropocene (e.g. from which to base future greenhouse gas (GHG) stabilization targets) is the Earth system sensitivity including fast feedbacks from changes in water vapour, natural aerosols, clouds and sea ice, slower surface albedo feedbacks from changes in continental ice sheets and vegetation, and climate-GHG feedbacks from changes in natural (land and ocean) carbon sinks. Traditionally, only fast feedbacks have been considered (with the other feedbacks either ignored or treated as forcing), which has led to estimates of the climate sensitivity for doubled CO concentrations of about 3°C. The 2×CO Earth system sensitivity is higher than this, being ~4-6°C if the ice sheet/vegetation albedo feedback is included in addition to the fast feedbacks, and higher still if climate-GHG feedbacks are also included. The inclusion of climate-GHG feedbacks due to changes in the natural carbon sinks has the advantage of more directly linking anthropogenic GHG emissions with the ensuing global temperature increase, thus providing a truer indication of the climate sensitivity to human perturbations. The Earth system climate sensitivity is difficult to quantify due to the lack of palaeo-analogues for the present-day anthropogenic forcing, and the fact that ice sheet and climate-GHG feedbacks have yet to become globally significant in the Anthropocene. Furthermore, current models are unable to adequately simulate the physics of ice sheet decay and certain aspects of the natural carbon and nitrogen cycles. Obtaining quantitative estimates of the ... |
format |
Article in Journal/Newspaper |
author |
Previdi, M. Liepert, B.G. Peteet, D. Hansen, J. Beerling, D.J. Broccoli, A.J. Frolking, S. Galloway, J.N. Heimann, M. Le Quéré, C. Levitus, S. Ramaswamy, V. |
spellingShingle |
Previdi, M. Liepert, B.G. Peteet, D. Hansen, J. Beerling, D.J. Broccoli, A.J. Frolking, S. Galloway, J.N. Heimann, M. Le Quéré, C. Levitus, S. Ramaswamy, V. Climate sensitivity in the anthropocene |
author_facet |
Previdi, M. Liepert, B.G. Peteet, D. Hansen, J. Beerling, D.J. Broccoli, A.J. Frolking, S. Galloway, J.N. Heimann, M. Le Quéré, C. Levitus, S. Ramaswamy, V. |
author_sort |
Previdi, M. |
title |
Climate sensitivity in the anthropocene |
title_short |
Climate sensitivity in the anthropocene |
title_full |
Climate sensitivity in the anthropocene |
title_fullStr |
Climate sensitivity in the anthropocene |
title_full_unstemmed |
Climate sensitivity in the anthropocene |
title_sort |
climate sensitivity in the anthropocene |
publishDate |
2013 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/47460/ https://doi.org/10.1002/qj.2165 |
genre |
Ice Sheet Sea ice |
genre_facet |
Ice Sheet Sea ice |
op_relation |
Previdi, M., Liepert, B.G., Peteet, D., Hansen, J., Beerling, D.J., Broccoli, A.J., Frolking, S., Galloway, J.N., Heimann, M., Le Quéré, C., Levitus, S. and Ramaswamy, V. (2013) Climate sensitivity in the anthropocene. Quarterly Journal of the Royal Meteorological Society, 139 (674). pp. 1121-1131. ISSN 0035-9009 doi:10.1002/qj.2165 |
op_doi |
https://doi.org/10.1002/qj.2165 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
139 |
container_issue |
674 |
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1121 |
op_container_end_page |
1131 |
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1766030897712201728 |