DOI: 10.11118/978-80-7701-087-0-0272

OCCURRENCE OF TROPICAL DAYS IN CITIES

Jaroslav Rožnovský^1,2

¹ Czech Hydrometeorological department, branch Brno, Kroftova 43, 616 67 Brno, Czechia

² Department of Breeding and Propagation of Horticultural Plants, Faculty of Horticulture, Mendel University in Brno, Valtická 337, 691 44 Lednice, Czechia

The urban environment climate is is determined by the specifics of the surface of cities, the number of inhabitants, the area of ​​greenery, etc. This means that cities have a specific climate, different from the natural landscape. The urban environment is not expressed by measurements at climatological stations of the Czech Hydrometeorological Institute (hereinafter referred to as KS). To characterize the urban climate, it is necessary to carry out separate meteorological measurements in the territory of a given city. In the warmest periods of the year, the differences in air temperature between measurements at KS and in the city center are more than 7 °C for the maximum temperature, around 5 °C for the minimum air temperature. Heat waves are more frequent in urban environments (continuous occurrence of tropical days for 3 or more days).On tropical days (maximum is equal to and higher than 30 °C), there are states of considerable discomfort for residents, especially in large unshaded paved areas, such as squares, industrial areas, but also parking lots at shopping centers.

Klíčová slova: Urban climate, tropical day, tropical day wave, discomfort

stránky: 272-276, Publikováno: 2026, online: 2026