EXAMINATIONS ON DEVELOPMENT OF THERMAL EXCESS IN SUBURBAN AREAS OF DEBRECEN, HUNGARY

Examinations on development of thermal excess in suburban areas of Debrecen. Effects of synoptic conditions on development of urban thermal excess, the urban heat island (UHI) are presented in this paper. Temperature datasets have been recorded at two heights by three automatic weather stations mounted in Debrecen (east Hungary) and a small settlement inits vicinity. An additional automatic weather station is used as a reference station outside Debrecen. UHI intensities have been calculated and the impact of synoptic conditions have been analyzed on the base of Peczely's macrosynoptic types. We have found that anticyclone types are much more favorable from the aspect of UHI development, while cyclone types, especially the passage of warm fronts can effectively hinder the formation of strong heat islands in Debrecen.