Thermohaline circulation hysteresis: a model intercomparison
We present results from an intercomparison of 11 different climate models of intermediate complexity, in which the North Atlantic Ocean was subjected to slowly varying changes in freshwater input. All models show a characteristic hysteresis response of the thermohaline circulation to the freshwater...
Published in: | Geophysical Research Letters |
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2005
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ftsouthampton:oai:eprints.soton.ac.uk:20378 2023-07-30T04:05:06+02:00 Thermohaline circulation hysteresis: a model intercomparison Rahmstorf, S. Crucifix, M. Ganopolski, A. Goosse, H. Kamenkovich, I. Knutti, R. Lohmann, G. Marsh, R. Mysak, L.A. Wang, Z.M. Weaver, A.J. 2005-12 https://eprints.soton.ac.uk/20378/ unknown Rahmstorf, S., Crucifix, M., Ganopolski, A., Goosse, H., Kamenkovich, I., Knutti, R., Lohmann, G., Marsh, R., Mysak, L.A., Wang, Z.M. and Weaver, A.J. (2005) Thermohaline circulation hysteresis: a model intercomparison. Geophysical Research Letters, 32 (23), L23605-[5pp]. (doi:10.1029/2005GL023655 <http://dx.doi.org/10.1029/2005GL023655>). Article PeerReviewed 2005 ftsouthampton https://doi.org/10.1029/2005GL023655 2023-07-09T20:36:31Z We present results from an intercomparison of 11 different climate models of intermediate complexity, in which the North Atlantic Ocean was subjected to slowly varying changes in freshwater input. All models show a characteristic hysteresis response of the thermohaline circulation to the freshwater forcing; which can be explained by Stommel's salt advection feedback. The width of the hysteresis curves varies between 0.2 and 0.5 Sv in the models. Major differences are found in the location of present-day climate on the hysteresis diagram. In seven of the models, present-day climate for standard parameter choices is found in the bi-stable regime, in four models this climate is in the mono-stable regime. The proximity of the present-day climate to the Stommel bifurcation point, beyond which North Atlantic Deep Water formation cannot be sustained, varies from less than 0.1 Sv to over 0.5 Sv. Article in Journal/Newspaper North Atlantic Deep Water North Atlantic University of Southampton: e-Prints Soton Geophysical Research Letters 32 23 |
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Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
We present results from an intercomparison of 11 different climate models of intermediate complexity, in which the North Atlantic Ocean was subjected to slowly varying changes in freshwater input. All models show a characteristic hysteresis response of the thermohaline circulation to the freshwater forcing; which can be explained by Stommel's salt advection feedback. The width of the hysteresis curves varies between 0.2 and 0.5 Sv in the models. Major differences are found in the location of present-day climate on the hysteresis diagram. In seven of the models, present-day climate for standard parameter choices is found in the bi-stable regime, in four models this climate is in the mono-stable regime. The proximity of the present-day climate to the Stommel bifurcation point, beyond which North Atlantic Deep Water formation cannot be sustained, varies from less than 0.1 Sv to over 0.5 Sv. |
format |
Article in Journal/Newspaper |
author |
Rahmstorf, S. Crucifix, M. Ganopolski, A. Goosse, H. Kamenkovich, I. Knutti, R. Lohmann, G. Marsh, R. Mysak, L.A. Wang, Z.M. Weaver, A.J. |
spellingShingle |
Rahmstorf, S. Crucifix, M. Ganopolski, A. Goosse, H. Kamenkovich, I. Knutti, R. Lohmann, G. Marsh, R. Mysak, L.A. Wang, Z.M. Weaver, A.J. Thermohaline circulation hysteresis: a model intercomparison |
author_facet |
Rahmstorf, S. Crucifix, M. Ganopolski, A. Goosse, H. Kamenkovich, I. Knutti, R. Lohmann, G. Marsh, R. Mysak, L.A. Wang, Z.M. Weaver, A.J. |
author_sort |
Rahmstorf, S. |
title |
Thermohaline circulation hysteresis: a model intercomparison |
title_short |
Thermohaline circulation hysteresis: a model intercomparison |
title_full |
Thermohaline circulation hysteresis: a model intercomparison |
title_fullStr |
Thermohaline circulation hysteresis: a model intercomparison |
title_full_unstemmed |
Thermohaline circulation hysteresis: a model intercomparison |
title_sort |
thermohaline circulation hysteresis: a model intercomparison |
publishDate |
2005 |
url |
https://eprints.soton.ac.uk/20378/ |
genre |
North Atlantic Deep Water North Atlantic |
genre_facet |
North Atlantic Deep Water North Atlantic |
op_relation |
Rahmstorf, S., Crucifix, M., Ganopolski, A., Goosse, H., Kamenkovich, I., Knutti, R., Lohmann, G., Marsh, R., Mysak, L.A., Wang, Z.M. and Weaver, A.J. (2005) Thermohaline circulation hysteresis: a model intercomparison. Geophysical Research Letters, 32 (23), L23605-[5pp]. (doi:10.1029/2005GL023655 <http://dx.doi.org/10.1029/2005GL023655>). |
op_doi |
https://doi.org/10.1029/2005GL023655 |
container_title |
Geophysical Research Letters |
container_volume |
32 |
container_issue |
23 |
_version_ |
1772816812129386496 |