Seasonal variability of eddy kinetic energy in a global high-resolution ocean model.

Rieck, Jan Klaus, Böning, Claus W. , Greatbatch, Richard John and Scheinert, Markus (2015) Seasonal variability of eddy kinetic energy in a global high-resolution ocean model. Open Access Geophysical Research Letters, 42 (21). pp. 9379-9386. DOI 10.1002/2015GL066152.

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Abstract

A global ocean model with 1/12∘ horizontal resolution is used to assess the seasonal cycle of surface Eddy Kinetic Energy (EKE). The model reproduces the salient features of the observed mean surface EKE, including amplitude and phase of its seasonal cycle in most parts of the ocean. In all subtropical gyres of the Pacific and Atlantic, EKE peaks in summer down to a depth of ∼350 m, below which the seasonal cycle is weak. Investigation of the possible driving mechanisms reveals the seasonal changes in the thermal interactions with the atmosphere to be the most likely cause of the summer maximum of EKE. The development of the seasonal thermocline in spring and summer is accompanied by stronger mesoscale variations in the horizontal temperature gradients near the surface which corresponds, by thermal wind balance, to an intensification of mesoscale velocity anomalies towards the surface.

Document Type: Article
Additional Information: WOS:000368336800073
Keywords: eddy kinetic energy; seasonal cycle; subtropical gyres; high-resolution ocean model
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-TM Theory and Modeling
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1002/2015GL066152
ISSN: 0094-8276
Related URLs:
Projects: RACE, Future Ocean, DRAKKAR
Expeditions/Models/Experiments:
Date Deposited: 09 Nov 2015 12:26
Last Modified: 25 Feb 2019 13:14
URI: http://oceanrep.geomar.de/id/eprint/30181

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