Nonlinearity of ocean heat uptake during warming and cooling in the FAMOUS climate model
Atmospheric CO2 concentration is expected to continue rising in the coming decades, but natural or artificial processes may eventually reduce it. We show that, in the FAMOUS atmosphere-ocean general circulation model, the reduction of ocean heat content as radiative forcing decreases is greater than...
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American Geophysical Union
2015
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ftunivreading:oai:centaur.reading.ac.uk:41301 2024-06-23T07:55:06+00:00 Nonlinearity of ocean heat uptake during warming and cooling in the FAMOUS climate model Bouttes, Nathaelle Good, P. Gregory, Jonathan M. Lowe, Jason Anthony 2015-04-16 text https://centaur.reading.ac.uk/41301/ https://centaur.reading.ac.uk/41301/1/Bouttes_et_al-2015-Geophysical_Research_Letters.pdf https://centaur.reading.ac.uk/41301/8/bouttes15nonlinearity_authors%20%281%29.pdf en eng American Geophysical Union https://centaur.reading.ac.uk/41301/1/Bouttes_et_al-2015-Geophysical_Research_Letters.pdf https://centaur.reading.ac.uk/41301/8/bouttes15nonlinearity_authors%20%281%29.pdf Bouttes, N. <https://centaur.reading.ac.uk/view/creators/90003857.html>, Good, P., Gregory, J. M. <https://centaur.reading.ac.uk/view/creators/90000874.html> orcid:0000-0003-1296-8644 and Lowe, J. A. <https://centaur.reading.ac.uk/view/creators/99000072.html> (2015) Nonlinearity of ocean heat uptake during warming and cooling in the FAMOUS climate model. Geophysical Research Letters, 42 (7). pp. 2409-2416. ISSN 0094-8276 doi: https://doi.org/10.1002/2014GL062807 <https://doi.org/10.1002/2014GL062807> Article PeerReviewed 2015 ftunivreading https://doi.org/10.1002/2014GL062807 2024-06-11T15:04:44Z Atmospheric CO2 concentration is expected to continue rising in the coming decades, but natural or artificial processes may eventually reduce it. We show that, in the FAMOUS atmosphere-ocean general circulation model, the reduction of ocean heat content as radiative forcing decreases is greater than would be expected from a linear model simulation of the response to the applied forcings. We relate this effect to the behavior of the Atlantic meridional overturning circulation (AMOC): the ocean cools more efficiently with a strong AMOC. The AMOC weakens as CO2 rises, then strengthens as CO2 declines, but temporarily overshoots its original strength. This nonlinearity comes mainly from the accumulated advection of salt into the North Atlantic, which gives the system a longer memory. This implies that changes observed in response to different CO2 scenarios or from different initial states, such as from past changes, may not be a reliable basis for making projections. Article in Journal/Newspaper North Atlantic CentAUR: Central Archive at the University of Reading Geophysical Research Letters 42 7 2409 2416 |
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Open Polar |
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CentAUR: Central Archive at the University of Reading |
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ftunivreading |
language |
English |
description |
Atmospheric CO2 concentration is expected to continue rising in the coming decades, but natural or artificial processes may eventually reduce it. We show that, in the FAMOUS atmosphere-ocean general circulation model, the reduction of ocean heat content as radiative forcing decreases is greater than would be expected from a linear model simulation of the response to the applied forcings. We relate this effect to the behavior of the Atlantic meridional overturning circulation (AMOC): the ocean cools more efficiently with a strong AMOC. The AMOC weakens as CO2 rises, then strengthens as CO2 declines, but temporarily overshoots its original strength. This nonlinearity comes mainly from the accumulated advection of salt into the North Atlantic, which gives the system a longer memory. This implies that changes observed in response to different CO2 scenarios or from different initial states, such as from past changes, may not be a reliable basis for making projections. |
format |
Article in Journal/Newspaper |
author |
Bouttes, Nathaelle Good, P. Gregory, Jonathan M. Lowe, Jason Anthony |
spellingShingle |
Bouttes, Nathaelle Good, P. Gregory, Jonathan M. Lowe, Jason Anthony Nonlinearity of ocean heat uptake during warming and cooling in the FAMOUS climate model |
author_facet |
Bouttes, Nathaelle Good, P. Gregory, Jonathan M. Lowe, Jason Anthony |
author_sort |
Bouttes, Nathaelle |
title |
Nonlinearity of ocean heat uptake during warming and cooling in the FAMOUS climate model |
title_short |
Nonlinearity of ocean heat uptake during warming and cooling in the FAMOUS climate model |
title_full |
Nonlinearity of ocean heat uptake during warming and cooling in the FAMOUS climate model |
title_fullStr |
Nonlinearity of ocean heat uptake during warming and cooling in the FAMOUS climate model |
title_full_unstemmed |
Nonlinearity of ocean heat uptake during warming and cooling in the FAMOUS climate model |
title_sort |
nonlinearity of ocean heat uptake during warming and cooling in the famous climate model |
publisher |
American Geophysical Union |
publishDate |
2015 |
url |
https://centaur.reading.ac.uk/41301/ https://centaur.reading.ac.uk/41301/1/Bouttes_et_al-2015-Geophysical_Research_Letters.pdf https://centaur.reading.ac.uk/41301/8/bouttes15nonlinearity_authors%20%281%29.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://centaur.reading.ac.uk/41301/1/Bouttes_et_al-2015-Geophysical_Research_Letters.pdf https://centaur.reading.ac.uk/41301/8/bouttes15nonlinearity_authors%20%281%29.pdf Bouttes, N. <https://centaur.reading.ac.uk/view/creators/90003857.html>, Good, P., Gregory, J. M. <https://centaur.reading.ac.uk/view/creators/90000874.html> orcid:0000-0003-1296-8644 and Lowe, J. A. <https://centaur.reading.ac.uk/view/creators/99000072.html> (2015) Nonlinearity of ocean heat uptake during warming and cooling in the FAMOUS climate model. Geophysical Research Letters, 42 (7). pp. 2409-2416. ISSN 0094-8276 doi: https://doi.org/10.1002/2014GL062807 <https://doi.org/10.1002/2014GL062807> |
op_doi |
https://doi.org/10.1002/2014GL062807 |
container_title |
Geophysical Research Letters |
container_volume |
42 |
container_issue |
7 |
container_start_page |
2409 |
op_container_end_page |
2416 |
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1802647521245265920 |