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Mountain ranges favour vigorous Atlantic meridional overturning

Sinha, Bablu, Blaker, Adam T., Hirschi, Joël J.-M., Bonham, Sarah, Brand, Matthew, Josey, Simon A., Smith, Robin S. and Marotzke, Jochem (2012) Mountain ranges favour vigorous Atlantic meridional overturning Geophysical Research Letters, 39, (2), L02705. (doi:10.1029/2011GL050485).

Record type: Article

Abstract

We use a global Ocean-Atmosphere General Circulation Model (OAGCM) to show that the major mountain ranges of the world have a significant role in maintenance of the Atlantic Meridional Overturning Circulation (AMOC). A simulation with mountains has a maximum AMOC of 18 Sv (1 Sv = 106 m3 s?1) compared with ?0 Sv for a simulation without mountains. Atlantic heat transport at 25°N is 1.1 PW with mountains compared to 0.2 PW without. The difference in AMOC is due to major changes in surface heat and freshwater (FW) fluxes over the Atlantic. In the Pacific changed surface fluxes lead to a meridional overturning circulation of 10 Sv. Our results suggest that the effects of mountains on the large-scale atmospheric circulation is to force the ocean towards a state with a vigorous AMOC and with no overturning in the Pacific.

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Published date: 2012
Organisations: Marine Systems Modelling, Marine Physics and Ocean Climate

Identifiers

Local EPrints ID: 209911
URI: http://eprints.soton.ac.uk/id/eprint/209911
ISSN: 0094-8276
PURE UUID: 2599f257-6593-46e1-aab0-e78bd5a3fe9a

Catalogue record

Date deposited: 02 Feb 2012 14:46
Last modified: 18 Jul 2017 10:46

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Contributors

Author: Bablu Sinha
Author: Adam T. Blaker
Author: Joël J.-M. Hirschi
Author: Sarah Bonham
Author: Matthew Brand
Author: Simon A. Josey
Author: Robin S. Smith
Author: Jochem Marotzke

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