In the framework of the ADRICOSM project, from October 2002 to September 2003, a coastal observing system network was set up in the Gulf of Trieste. During this period, 36 CTD cruises were performed over a grid of 19 stations. An accurate data acquisition and quality check protocol was implemented for data decimation and smoothing. However, data analysis showed that conductivity/ salinity spikes were recorded at the depth of the very sharp thermocline observed in summer 2003. The exceptionally high salinity waters and the marked thermocline observed in the Gulf of Trieste in spring and summer 2003 directed us to compare the distributions of the temperature and salinity fields observed during ADRICOSM cruises with the available climatological values of the Gulf of Trieste, in order to assess whether the data collected during this research deviated significantly from the climatology.U okviru projekta ADRICOSM, od listopada 2002. do rujna 2003. godine, provedeno je 36 krstarenja tijekom kojih se uzorkovalo CTD sondom na 19 postaja u Tršćanskom zaljevu. Posebna pažnja je posvećena kvaliteti podataka. Tijekom ljeta 2003. godine opaženi su nagli skokovi vrijednosti saliniteta i gustoće (tzv. “spikes”) u području izražene termokline. U proljeće i ljeto 2003. godine vrijednosti saliniteta bile su izrazito visoke. Polja temperature i saliniteta određena za to razdoblje uspoređena su s postojećim podacima ne bi li se utvrdilo koliko odstupaju od prosjeka
