A multimodel comparison of centennial Atlantic meridional overturning circulation variability

Menary, M., Park, Wonsun, Lohmann, K., Vellinga, M., Palmer, M. D., Latif, Mojib and Jungclauss, J. H. (2012) A multimodel comparison of centennial Atlantic meridional overturning circulation variability Climate Dynamics, 38 (11-12). pp. 2377-2388. DOI 10.1007/s00382-011-1172-4.

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Abstract

A mechanism contributing to centennial variability of the Atlantic Meridional Overturning Circulation (AMOC) is tested with multi-millennial control simulations of several coupled general circulation models (CGCMs). These are a substantially extended integration of the 3rd Hadley Centre Coupled Climate Model (HadCM3), the Kiel Climate Model (KCM), and the Max Plank Institute Earth System Model (MPI-ESM). Significant AMOC variability on time scales of around 100 years is simulated in these models. The centennial mechanism links changes in the strength of the AMOC with oceanic salinities and surface temperatures, and atmospheric phenomena such as the Intertropical Convergence Zone (ITCZ). 2 of the 3 models reproduce all aspects of the mechanism, with the third (MPI-ESM) reproducing most of them. A comparison with a high resolution paleo-proxy for Sea Surface Temperatures (SSTs) north of Iceland over the last 4,000 years, also linked to the ITCZ, suggests that elements of this mechanism may also be detectable in the real world.

Document Type: Article
Additional Information: WOS:000304696300016
Keywords: Meteorology; Climatology; AMOC, MOC, Overturning, North Atlantic, Centennial variability, ITCZ; SEA-SURFACE TEMPERATURE; DECADAL TIME-SCALES; THERMOHALINE CIRCULATION; NORTH-ATLANTIC; CLIMATE MODEL; OCEAN; HOLOCENE; 26.5-DEGREES-N; SIMULATION; TRANSPORTS
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-ME Maritime Meteorology
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.1007/s00382-011-1172-4
ISSN: 0930-7575
Projects: THOR, NORTH ATLANTIC, Future Ocean
Expeditions/Models:
Date Deposited: 26 Aug 2011 07:21
Last Modified: 13 Sep 2016 11:10
URI: http://eprints.uni-kiel.de/id/eprint/12049

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