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Volume 9, issue 3
Ocean Sci., 9, 561-572, 2013
https://doi.org/10.5194/os-9-561-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ocean Sci., 9, 561-572, 2013
https://doi.org/10.5194/os-9-561-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 14 Jun 2013

Research article | 14 Jun 2013

Exceptional dense water formation on the Adriatic shelf in the winter of 2012

H. Mihanović1, I. Vilibić2, S. Carniel3, M. Tudor4, A. Russo5,6, A. Bergamasco3, N. Bubić2, Z. Ljubešić7, D. Viličić7, A. Boldrin3, V. Malačič8, M. Celio9, C. Comici10, and F. Raicich11 H. Mihanović et al.
  • 1Hydrographic Institute of the Republic of Croatia, Split, Croatia
  • 2Institute of Oceanography and Fisheries, Split, Croatia
  • 3CNR – Istituto di Scienze Marine, Venice, Italy
  • 4Meteorological and Hydrological Service of Croatia, Zagreb, Croatia
  • 5DISVA, Università Politecnica delle Marche, Ancona, Italy
  • 6CNR – Istituto di Scienze Marine, Bologna, Italy
  • 7Division of Biology, Faculty of Science, University of Zagreb, Zagreb, Croatia
  • 8National Institute of Biology, Marine Biological Station, Piran, Slovenia
  • 9Regional Environmental Protection Agency – ARPA FVG, Palmanova, Italy
  • 10Istituto Nazionale di Oceanografia e di Geofisica Sperimentale – OGS, Trieste, Italy
  • 11CNR – Istituto di Scienze Marine, Trieste, Italy

Abstract. In this paper we document dense water formation throughout the Adriatic shelf and coastal area in January/February 2012, resulting in record-breaking densities observed during and after the event. The unprecedented dense water generation was preconditioned by a dry and warm year which resulted in a significant reduction of coastal freshwaters, superimposed on a long-term basin-wide salinity increase. The final event that triggered the dense water formation was an extended period of cold weather with strong and severe winds. Record-breaking potential density anomalies (above 30 kg m−3) were measured at several formation sites. Accumulated surface net heat and water losses in some coastal regions exceeded 1.5 GJ m−2 and 250 kg m−2 over 21 days, respectively. Excessiveness, importance of shelf-type dense water formation and effects on the thermohaline circulation and deep aquatic systems are discussed.

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