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The Canary Basin contribution to the seasonal cycle of the Atlantic Meridional Overturning Circulation at 26°N

Pérez-Hernández, M.D.; McCarthy, G.D.; Vélez-Belchí, P.; Smeed, D.A.; Fraile-Nuez, E.; Hernández-Guerra, A.. 2015 The Canary Basin contribution to the seasonal cycle of the Atlantic Meridional Overturning Circulation at 26°N. Journal of Geophysical Research: Oceans, 120 (11). 7237-7252. 10.1002/2015JC010969

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AGU Publisher statement: An edited version of this paper was published by AGU. © (2015) American Geophysical Union. Further reproduction or electronic distribution is not permitted. DOI: 10.1002/2015JC010969
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Abstract/Summary

This study examines the seasonal cycle of the Atlantic Meridional Overturning Circulation (AMOC) and its eastern boundary contributions. The cycle has a magnitude of 6 Sv, as measured by the RAPID/MOCHA/WBTS project array at 26°N, which is driven largely by the eastern boundary. The eastern boundary variations are explored in the context of the regional circulation around the Canary Islands. There is a 3 month lag between maximum wind forcing and the largest eastern boundary transports, which is explained in terms of a model for Rossby wave generated at the eastern boundary. Two dynamic processes take place through the Lanzarote Passage (LP) in fall: the recirculation of the Canary Current and the northward flow of the Intermediate Poleward Undercurrent. In contrast, during the remaining seasons the transport through the LP is southward due to the Canary Upwelling Current. These processes are linked to the seasonal cycle of the AMOC.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1002/2015JC010969
ISSN: 21699275
Additional Keywords: AMOC; Canary Basin; eastern boundary; North Atlantic Subtropical Gyre; RAPID; EBC
NORA Subject Terms: Marine Sciences
Date made live: 09 Nov 2015 10:04 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/512183

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