Air Temperature Stratification Near the Ground in Relation with Atmospheric Circulation Within the Siret Corridor

The study presents the results of 3 years of measurements on air temperature in the lowest part of the Siret Corridor, on a 50 m high vertical profile. Using the hourly and daily values of air temperature from these 2 observation points, the main features of air temperature above the surface were described. Also, the study explores the connection between the atmospheric circulation and the air temperature stratification in the Siret Corridor. In view of this, an atmospheric circulation classification was derived from COST-733 software and was corroborated with observational data. In this way, the synoptic conditions associated with different types of air temperature stratification in the study region were identified. The results indicate that the temperature inversions became prevalent at annual level concerning minimum air temperature, representing the most common temperature stratification during winter mornings, but they develop even from the end of the summer. From a dynamic point of view, besides the well-known role of high pressure centers, other types of synoptic conditions have been identified as favorable for the occurrence of air temperature inversions