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Internal Tidal Hydrodynamics and Ambient Characteristics of the Adriatic (ITHACA)

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Performance/technical rept., 1 Jan-31 Dec 2006

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Field phase of the ITHACA project has been carried out between February and September 2006. During the experiment 1 meteorological conditions were documented by permanent stations in the area Split-Marjan, Dubrovnik, Komiza, Hvar and Palagruza 2 optical surveys were performed twice at stations Bisevo, Susac and Lastovo 3 shipboard CTD surveys were carried out on four occasions at an along-basin transect comprising 13 closely spaced stations 4 thermistor data were collected on the islands of Bisevo, Susac and Lastovo utilizing 3 x 10 sensors deployed on steep cliffs opened to the southeast 5 ADCP measurements were performed at three stations using trawl-resistant bottom mounts called barnys and 6 surface tides were monitored at the permanent Split and Dubrovnik stations and at one of the ADCP stations. The project was successful, as all the instruments were recovered except one of the thermistors. Preliminary analysis of the data collected has shown that diurnal temperature oscillations were particularly strong at one of the islands Lastovo and that corresponding baroclinic current variability was largest at a nearby ADCP station. Apparently, the diurnal signal was related not only to internal tides but also to periodic upwelling and downwelling events that were especially pronounced in July 2006. Inertial oscillations were also well visible in both the temperature and ADCP time series. Lower frequencies were dominated by the east-coast inflow to the Adriatic, which, however, underwent a summertime change recorded in July 2006 at two of the ADCP stations, between May and July 2006 at one station.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Fluid Mechanics

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