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Maritime Meteorological Ship-based Observations in the Adriatic and their Comparison to the Climatological Island-based Observation

The organization and surveillance of the ship based meteo-service in the Croatian Adriatic is conducted by the Croatian Maritime Meteorological Service from Split. This Service is a part of the Croatian Meteorological and Hydrological Service based in Zagreb, Croatia's capital. This article will verify the ship based meteo-reports from 1961-1990, obtained along the main travel route (south-north). For this purpose, the Adriatic has been divided in 28 1ox1o quadrants. We will compare the following meteo-data: the frequency of the wind direction and speed, sea and air temperature obtained from the ship-based meteo-stations in three quadrants (1st quadrant from 44-45oN and 14-15o E, 2nd from 43-44oN and 14.5-15.5oE and the 3rd from 42-43oN and 16-17oE) and the data obtained from three relevant meteorological island-based stations (Mali Lošinj, Tajerske sestrice and Palagruža) in the same quadrants. The number of the ship-based observations is: 408 for the quadrant I, 673 for the II and 10055 for the III. The analysis and comparison of the wind wave height in all three quadrants for the 1979/80 winter season is also discussed here. This is the time when most of the ship-based observations was done. The results of the comparison have established that quadrant III has the best data concordance, which is not the case for the quadrants I and III. In quadrant I this was expected, because it is closer to the Dinarid mountain range that affects the characteristics of the meteo-data in the Adriatic. Better concordance in the II and not so good in the III is a result of the precision of maritime measurements of Tajer and Palagruža meteo-stations.

Croatian Maritime Meteorological Service; ship based meteo-reports; wind direction and speed; sea and air temperature; wind wave height

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