Influence of the equatorial deep jets on the north equatorial countercurrent.

Matthießen, Jan-Dirk, Greatbatch, Richard John , Brandt, Peter , Claus, Martin and Didwischus, Sven-Helge (2015) Influence of the equatorial deep jets on the north equatorial countercurrent. Ocean Dynamics, 65 . pp. 1095-1102. DOI 10.1007/s10236-015-0855-5.

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Abstract

An ocean circulation model is run using two different idealized equatorial basin configurations under steady wind forcing. Both model versions produce bands of vertically alternating zonal flow at depth, similar to observed Equatorial Deep Jets (EDJs) and with a time scale corresponding to that of the gravest equatorial basin mode for the dominant baroclinic vertical normal mode. Both model runs show evidence for enhanced variability in the surface signature of the North Equatorial Counter Current (NECC) with the same time scale. We also find the same link between the observed NECC and the EDJs in the Atlantic by comparing the signature of the EDJ in moored zonal velocity data at 23° W on the equator with the signature of the NECC in geostrophic velocities from altimeter data. We argue that the presence of a peak in variability in the NECC associated with the EDJ basin mode period is evidence that the influenceatthis time scale is upward, from the EDJ to the NECC

Document Type: Article
Funder compliance: info:eu-repo/grantAgreement/EC/FP7/603521
Additional Information: Topical Collection on Atmosphere and Ocean Dynamics: A Scientific Workshop to Celebrate Professor Dr. Richard Greatbatch's 60th Birthday, Liverpool, UK, 10-11 April 2014 WOS:000358604600004
Keywords: North Equatorial Counter Current; Ocean circulation model; Equatorial Deep Jets
Research affiliation: OceanRep > SFB 754
OceanRep > SFB 754 > A4
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-TM Theory and Modeling
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
Kiel University
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1007/s10236-015-0855-5
ISSN: 1616-7341
Projects: PREFACE, SFB754, SACUS
Date Deposited: 18 Jun 2015 11:59
Last Modified: 19 Dec 2017 12:48
URI: http://oceanrep.geomar.de/id/eprint/28998

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