The mixed-layer/thermocline cycle of a persistent warm core eddy in the eastern Mediterranean

Stephen Brenner, Zvi Rozentraub, Jonah Bishop, Michael Krom

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Analysis of data from several recent cruises reveals the presence of a persistent warm core eddy located to the southeast of Cyprus. The core of the eddy is warmer and more saline than the environment. The strongest temperature and salinity anomalies are subsurface and reach maximum values of 2-2.4°C and 0.25-0.34 respectively in the layer 200-400 m. In the winter, the core of the eddy consists of a deep mixed layer from the surface to a depth of nearly 400 m while in summer the seasonal thermocline caps the nearly isothermal, isohaline thermostad which remains at 200-400 m. The eddy has no apparent surface signal in summer and only a very weak signal (∼0.5°C) in winter. A one-dimensional model is developed which simulates all aspects of the observed seasonal mixed-layer/thermocline cycle except for the weak signal of Atlantic water which appears near a depth of 40 m during the summer. Finally, a possible mechanism for the generation of the eddy is suggested.

Original languageEnglish
Pages (from-to)457-476
Number of pages20
JournalDynamics of Atmospheres and Oceans
Volume15
Issue number3-5
DOIs
StatePublished - Apr 1991
Externally publishedYes

Bibliographical note

Funding Information:
We wish to expresso ur thankst o G. Brokman,S . Kurilov, Y. Mouwes,D . Ramot, and A. Ben-Nun and the crew of the R/V Shikmona for their diligent efforts in collectingt he POEM and ED cruise data. We also thank Dr. A. Hecht for many helpful discussionst,h etwo anonymourse viewersfo r their constructivec omments,a nd H. Bernard for carefully drafting the figures. This work was supportedw ith funding from Israel Oceanographic and LimnologicalR esearch,t he Ministry of Energya nd Infrastructureo f Israel, and The Cohan Marine Climate ResearchC enter.

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