Sea level oscillations in the Gulf of Trieste, the role of the atmospheric-pressure forcing and the tidal effect in the pressure and wind behaviour

This paper is divided into three parts. The first one takes some cases of sea level perturbation (the tides being removed) at Trieste into account. The spectral analysis shows the occurring of the principal seiches of the Adriatic Sea together with oscillations believed as forced oscillations. In the second part the pressure oscillations have been examined and the same periods forcing the sea level have been found. Such oscillations appear very evident and stable, mostly in the summer months. In the third part of the work the tidal effect on the wind, derived from the atmospheric pressure, is tested. In the summer situations prevailing breezes are present and the spectral analysis of the records points out clearly the occurrence of some 'wind tides' both in the diurnal and semi-diurnal range