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Volume 11, issue 1
Ocean Sci., 11, 53–66, 2015
https://doi.org/10.5194/os-11-53-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Physical, chemical and biological oceanography of the Mediterranean...

Ocean Sci., 11, 53–66, 2015
https://doi.org/10.5194/os-11-53-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 09 Jan 2015

Research article | 09 Jan 2015

Thermohaline properties in the Eastern Mediterranean in the last three decades: is the basin returning to the pre-EMT situation?

V. Cardin1, G. Civitarese1, D. Hainbucher2, M. Bensi1, and A. Rubino3 V. Cardin et al.
  • 1OGS, Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Borgo Grotta Gigante 42/c, 34018 Sgonico, Trieste, Italy
  • 2CEN, Institut für Meereskunde, University of Hamburg, Bundesstraße 53, 20146 Hamburg, Germany
  • 3Università Ca' Foscari di Venezia, Dorsoduro 2137, 30121 Venice, Italy

Abstract. Temperature, salinity and oxygen data collected during April and June 2011 (M84/3 and P414 cruises respectively) are analysed to derive the oceanographic characteristics of the Eastern Mediterranean (EM) basin. These observed characteristics are compared with those from previous cruises over the period 1987–2011. As a result, the interannual and decadal variability of the EM thermohaline properties are discussed in the context of the evolution of the Eastern Mediterranean Transient (EMT) and of the general circulation of the basin. We found that the state of the EM is still far from the pre-EMT conditions, though the 2011 results possibly indicate a slow return to this status. In particular, a comparison between thermohaline property evolution deriving from interannual variability of the preconditioning and air–sea interaction (heat fluxes) in the South Adriatic and the Cretan Seas reveals aspects of the alternation of the two dense water sources (Adriatic and Aegean) during the last three decades, which have strong implications for the hydrographic characteristics of the intermediate and deep layers of the Ionian and Levantine basins.

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The results of this study reveal that the thermohaline properties in the study area in 2011 lie between the thermohaline characteristics of the EMT and those of the pre-EMT phase, indicating a possible slow return towards the latter. It highlights the relationship between the hydrological property distribution of the upper layer in the Levantine basin and the alternate circulation regimes in the Ionian, which modulates the salinity distribution in the Eastern Mediterranean Sea.
The results of this study reveal that the thermohaline properties in the study area in 2011 lie...
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