engleski

Alternating upwelling/downwelling in the Adriatic Sea

An experiment was carried out in the Adriatic shelf-break area, from February to September 2006, in order to investigate internal tides and background against which they develop. It resulted in an unexpected finding: subsurface temperature oscillations, characterized by the 24, 12 and 8 h periods, were exceptionally strong at one of the thermistor stations and the corresponding baroclinic current variability was largest at a nearby ADCP station. In order to distinguish between the tidal and wind forcing of the diurnal variability, wavelet spectral analysis was performed on the meteorological and oceanographic time series. It showed that the sea/land breezes were responsible for the periodic interchange of pronounced upwelling and downwelling in mid-July 2006. The event was analyzed in some detail and was interpreted using results of analytical and numerical modeling.

Adriatic Sea; upwelling; downwelling

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