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Ocean Science An interactive open-access journal of the European Geosciences Union
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Volume 10, issue 5
Ocean Sci., 10, 759–770, 2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ocean Sci., 10, 759–770, 2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 02 Oct 2014

Research article | 02 Oct 2014

Variability of water mass properties in the Strait of Sicily in summer period of 1998–2013

A. Bonanno1, F. Placenti1, G. Basilone1, R. Mifsud2, S. Genovese1, B. Patti1, M. Di Bitetto3, S. Aronica1, M. Barra1, G. Giacalone1, R. Ferreri1, I. Fontana1, G. Buscaino1, G. Tranchida1, E. Quinci1, and S. Mazzola1 A. Bonanno et al.
  • 1Istituto per l'Ambiente Marino Costiero (IAMC) of the Consiglio Nazionale delle Ricerche (CNR), Detached Units of Capo Granitola (TP), Naples and Mazara del Vallo (TP), Italy
  • 2Ministry for Resources and Rural Affairs (MRRA), Fort San Lucjan, Malta
  • 3Consiglio Nazionale delle Ricerche (CNR), P.le A. Moro, 7-00185, Rome, Italy

Abstract. The Strait of Sicily plays a crucial role in determining the water-mass exchanges and related properties between the western and eastern Mediterranean. Hydrographic measurements carried out from 1998 to 2013 allowed the identification of the main water masses present in the Strait of Sicily: a surface layer composed of Atlantic water (AW) flowing eastward, intermediate and deep layers mainly composed of Levantine intermediate water (LIW), and transitional eastern Mediterranean deep water (tEMDW) flowing in the opposite direction. Furthermore, for the first time, the signature of intermittent presence of western intermediate water (WIW) is also highlighted in the northwestern part of the study area (12.235° E, 37.705° N).

The excellent area coverage allowed to highlight the high horizontal and vertical inter-annual variability affecting the study area and also to recognize the permanent character of the main mesoscale phenomena present in the surface water layer.

Moreover, strong temperature-salinity correlations in the intermediate layer, for specific time intervals, seem to be linked to the reversal of surface circulation in the central Ionian Sea.

The analysis of CTD data in deeper water layer indicates the presence of a large volume of tEMDW in the Strait of Sicily during the summers of 2006 and 2009.

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