Sensitivity of the thermohaline circulation in coupled oceanic GCM - atmospheric EBM experiments
We analyze the sensitivity of the oceanic thermohaline circulation (THC) regarding perturbations in fresh water flux for a range of coupled oceanic general circulation - atmospheric energy balance models. The energy balance model (EBM) predicts surface air temperature and fresh water flux and contai...
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ftawi:oai:epic.awi.de:1986 2023-09-05T13:23:30+02:00 Sensitivity of the thermohaline circulation in coupled oceanic GCM - atmospheric EBM experiments Lohmann, Gerrit Gerdes, Rüdiger Chen, D. 1996 application/pdf https://epic.awi.de/id/eprint/1986/ https://epic.awi.de/id/eprint/1986/1/Loh1996a.pdf https://hdl.handle.net/10013/epic.12577 https://hdl.handle.net/10013/epic.12577.d001 unknown https://epic.awi.de/id/eprint/1986/1/Loh1996a.pdf https://hdl.handle.net/10013/epic.12577.d001 Lohmann, G. orcid:0000-0003-2089-733X , Gerdes, R. and Chen, D. (1996) Sensitivity of the thermohaline circulation in coupled oceanic GCM - atmospheric EBM experiments , Climate Dynamics, 12 , pp. 403-416 . hdl:10013/epic.12577 EPIC3Climate Dynamics, 12, pp. 403-416 Article isiRev 1996 ftawi 2023-08-22T19:43:00Z We analyze the sensitivity of the oceanic thermohaline circulation (THC) regarding perturbations in fresh water flux for a range of coupled oceanic general circulation - atmospheric energy balance models. The energy balance model (EBM) predicts surface air temperature and fresh water flux and contains the feedbacks due to meridional transports of sensible and latent heat. In the coupled system we examine a negative perturbation in run-off into the southern ocean and analyze the role of changed atmospheric heat transports and fresh water flux. With mixed boundary conditions (fixed air temperature and fixed surface fresh water fluxes) the response is characterised by a completely different oceanic heat transport than in the reference case. On the other hand, the surface heat flux remains roughly constant when the air temperature can adjust in a model where no anomalous atmospheric transports are allowed. This gives an artificially stable system with nearly unchanged oceanic heat transport. However, if meridional heat transports in the atmosphere are included, the sensitivity of the system lies between the two extreme cases. We find that changes in fresh water flux are unimportant for the THC in the coupled system. Article in Journal/Newspaper Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Southern Ocean |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
We analyze the sensitivity of the oceanic thermohaline circulation (THC) regarding perturbations in fresh water flux for a range of coupled oceanic general circulation - atmospheric energy balance models. The energy balance model (EBM) predicts surface air temperature and fresh water flux and contains the feedbacks due to meridional transports of sensible and latent heat. In the coupled system we examine a negative perturbation in run-off into the southern ocean and analyze the role of changed atmospheric heat transports and fresh water flux. With mixed boundary conditions (fixed air temperature and fixed surface fresh water fluxes) the response is characterised by a completely different oceanic heat transport than in the reference case. On the other hand, the surface heat flux remains roughly constant when the air temperature can adjust in a model where no anomalous atmospheric transports are allowed. This gives an artificially stable system with nearly unchanged oceanic heat transport. However, if meridional heat transports in the atmosphere are included, the sensitivity of the system lies between the two extreme cases. We find that changes in fresh water flux are unimportant for the THC in the coupled system. |
format |
Article in Journal/Newspaper |
author |
Lohmann, Gerrit Gerdes, Rüdiger Chen, D. |
spellingShingle |
Lohmann, Gerrit Gerdes, Rüdiger Chen, D. Sensitivity of the thermohaline circulation in coupled oceanic GCM - atmospheric EBM experiments |
author_facet |
Lohmann, Gerrit Gerdes, Rüdiger Chen, D. |
author_sort |
Lohmann, Gerrit |
title |
Sensitivity of the thermohaline circulation in coupled oceanic GCM - atmospheric EBM experiments |
title_short |
Sensitivity of the thermohaline circulation in coupled oceanic GCM - atmospheric EBM experiments |
title_full |
Sensitivity of the thermohaline circulation in coupled oceanic GCM - atmospheric EBM experiments |
title_fullStr |
Sensitivity of the thermohaline circulation in coupled oceanic GCM - atmospheric EBM experiments |
title_full_unstemmed |
Sensitivity of the thermohaline circulation in coupled oceanic GCM - atmospheric EBM experiments |
title_sort |
sensitivity of the thermohaline circulation in coupled oceanic gcm - atmospheric ebm experiments |
publishDate |
1996 |
url |
https://epic.awi.de/id/eprint/1986/ https://epic.awi.de/id/eprint/1986/1/Loh1996a.pdf https://hdl.handle.net/10013/epic.12577 https://hdl.handle.net/10013/epic.12577.d001 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
EPIC3Climate Dynamics, 12, pp. 403-416 |
op_relation |
https://epic.awi.de/id/eprint/1986/1/Loh1996a.pdf https://hdl.handle.net/10013/epic.12577.d001 Lohmann, G. orcid:0000-0003-2089-733X , Gerdes, R. and Chen, D. (1996) Sensitivity of the thermohaline circulation in coupled oceanic GCM - atmospheric EBM experiments , Climate Dynamics, 12 , pp. 403-416 . hdl:10013/epic.12577 |
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1776204094198775808 |