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          Institute: MPI für Meteorologie     Collection: Ocean in the Earth System     Display Documents

ID: 256349.0, MPI für Meteorologie / Ocean in the Earth System
A model intercomparison of changes in the Atlantic thermohaline circulation in response to increasing atmospheric CO2 concentration
Authors:Gregory, J. M.; Dixon, K. W.; Stouffer, R. J.; Weaver, A. J.; Driesschaert, E.; Eby, M.; Fichefet, T.; Hasumi, H.; Hu, A.; Jungclaus, J. H.; Kamenkovich, I. V.; Levermann, A.; Montoya, M.; Murakami, S.; Nawrath, S.; Oka, A.; Sokolov, A. P.; Thorpe, R. B.
Date of Publication (YYYY-MM-DD):2005-06-23
Title of Journal:Geophysical Research Letters
Journal Abbrev.:Geophys. Res. Lett.
Issue / Number:12
Sequence Number of Article:L12703
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:As part of the Coupled Model Intercomparison Project, integrations with a common design have been undertaken with eleven different climate models to compare the response of the Atlantic thermohaline circulation (THC) to time-dependent climate change caused by increasing atmospheric CO2 concentration. Over 140 years, during which the CO2 concentration quadruples, the circulation strength declines gradually in all models, by between 10 and 50%. No model shows a rapid or complete collapse, despite the fairly rapid increase and high final concentration of CO2. The models having the strongest overturning in the control climate tend to show the largest THC reductions. In all models, the THC weakening is caused more by changes in surface heat flux than by changes in surface water flux. No model shows a cooling anywhere, because the greenhouse warming is dominant.
Free Keywords:1626 Global Change: Global climate models (3337, 4928); 1635 Global Change: Oceans (1616, 3305, 4215, 4513); 1605 Global Change: Abrupt/rapid climate change (4901, 8408).
External Publication Status:published
Document Type:Article
Communicated by:Carola Kauhs
Affiliations:MPI für Meteorologie/Ocean in the Earth System
External Affiliations:Univ Reading, Dept Meteorol, Ctr Global Atmospher Modelling, Reading RG6 6BB, Berks, England.; Met Off Hadley Ctr, Exeter, Devon, England.; Geophys Fluid Dynam Lab, Princeton, NJ 08542 USA.; Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC V8W 3P6, Canada.; Univ Catholique Louvain, Inst Astron & Geophys Georges Lemaitre, B-1348 Louvain, Belgium.; Univ Tokyo, Ctr Climate Syst Res, Tokyo, Japan.; Natl Ctr Atmospher Res, Boulder, CO 80307 USA.; Univ Washington, Joint Inst Study Atmosphere & Ocean, Seattle, WA 98195 USA.; Potsdam Inst Climate Impact Res, D-14473 Potsdam, Germany.; Univ Complutense Madrid, Fac Ciencias Fis, Dept Astrofis & Ciencias Atmosfera, Madrid, Spain.; Japan Agcy Marine Earth Sci & Technol, Frontier Res Ctr Global Change, Yokohama, Kanagawa, Japan.; MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA.
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