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Thermic inversions in the area of Oradea. The present paper analyses thermic inversions, vertical thermic gradients, as well as daily thermic differences measured at the Oradea meteo station in comparison with the meteo station at Dumbrăviţa de Codru, based on daily data of meteorological observations at the two stations between 1983-1992. The analysis of the thermic inversions in Oradea was made by measuring the daily thermic differences of the average, maximum and minimum temperatures between the Oradea meteo station (136 m) and Dumbrăviţa de Codru (590 m), stations which are situated at a difference of altitude of 454 m. It has been noted that in Oradea, thermic inversions are likely to appear every month and season of the year, but they are not too frequent because of the geographic location of the city on the direction of western air masses movement which maintain an accentuated instability of the air. The intensity of the thermic inversion in Oradea has an average temperature range between -4,4°C in the summer, -4,0°C in the winter and -3,0°C in the fall.

Keywords: thermic inversion, Oradea, radiation, average, gradient .