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Kuhlbrodt, T. and Griesel, A. and Montoya Redondo, María Luisa and Levermann, A. and Hofmann, M. and Rahmstorf, S. (2007) On the driving processes of the Atlantic meridional overturning circulation. Reviews of geophysics, 45 (1). ISSN 8755-1209
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Official URL: http://dx.doi.org/10.1029/2004RG000166
Abstract
Because of its relevance for the global climate the Atlantic meridional overturning circulation (AMOC) has been a major research focus for many years. Yet the question of which physical mechanisms ultimately drive the AMOC, in the sense of providing its energy supply, remains a matter of controversy. Here we review both observational data and model results concerning the two main candidates: vertical mixing processes in the ocean's interior and wind-induced Ekman upwelling in the Southern Ocean. In distinction to the energy source we also discuss the role of surface heat and freshwater fluxes, which influence the volume transport of the meridional overturning circulation and shape its spatial circulation pattern without actually supplying energy to the overturning itself in steady state. We conclude that both wind-driven upwelling and vertical mixing are likely contributing to driving the observed circulation. To quantify their respective contributions, future research needs to address some open questions, which we outline.
Item Type: | Article |
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Additional Information: | © 2007 by the American Geophysical Union. |
Uncontrolled Keywords: | Ocean general-circulation; Coupled climate model; Deep-water formation; Wind-energy input; Global thermohaline circulation; Resolution Antarctic model; Tracer-release experiment; North-Atlantic; Southern-ocean; Heat-transport |
Subjects: | Sciences > Physics > Astrophysics Sciences > Physics > Astronomy |
ID Code: | 37941 |
Deposited On: | 31 May 2016 14:58 |
Last Modified: | 10 Dec 2018 15:05 |
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