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Volume 10, issue 4
Ocean Sci., 10, 669-682, 2014
https://doi.org/10.5194/os-10-669-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

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

Ocean Sci., 10, 669-682, 2014
https://doi.org/10.5194/os-10-669-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 29 Jul 2014

Research article | 29 Jul 2014

Hydrographic situation during cruise M84/3 and P414 (spring 2011) in the Mediterranean Sea

D. Hainbucher1, A. Rubino2, V. Cardin3, T. Tanhua4, K. Schroeder5, and M. Bensi3 D. Hainbucher et al.
  • 1CEN, Institut für Meereskunde, University of Hamburg, Bundesstraße 53, 20146 Hamburg, Germany
  • 2Università Ca' Foscari di Venezia, Dorsoduro, 2137 – C.A.P. 30121, Italy
  • 3OGS – Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Borgo Grotta Gigante, 42/c, 34018 Sgonico, Trieste, Italy
  • 4GEOMAR Helmholtz Centre for Ocean Research Kiel, Department of Chemical Oceanography, Düsternbrooker Weg 20, 24105 Kiel, Germany
  • 5Istituto di Scienze Marine – ISMAR, Consiglio Nazionale delle Ricerche (CNR), Arsenale – Tesa 104, Castello 2737/F, 30122 Venice, Italy

Abstract. Aspects of hydrography and large-scale circulation observed in the Mediterranean Sea during the M84/3 and P414 cruises (April and June 2011, respectively) are presented. In contrast to most of the recent expeditions, which were limited to special areas of the basin, these two cruises, especially the M84/3, offered the opportunity of delineating a quasi-synoptic picture of the distribution of the relevant physical parameters along a section extending through the whole Mediterranean, from the Lebanese coast up to the Strait of Gibraltar. The foci of our analysis are the observed water mass properties and velocity fields. The first are investigated through TS diagrams and an optimum multiparameter (OMP) analysis and the results are discussed also in the context of recently identified modes of variability; the second are studied by comparing the velocity fields observed using a vessel-mounted Acoustic Doppler Current Profiler and those calculated from the observed density fields. Overall, a distribution of temperature, salinity and geostrophic velocities emerges, which is far from that observed before the beginning of the so-called "Eastern Mediterranean Transient", a major climatic shift in the hydrography and circulation of the Mediterranean Sea which began at the end of the 1980s. The picture which emerges helps to further address the complexity of long-term evolution of hydrography and large-scale circulation of the Mediterranean Sea.

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