A TERMÁLIS INVERZIÓ VISELKEDÉSE A MOHOS-TÖBÖR MIKROKLÍMARENDSZERÉN BELÜL 2023 ŐSZÉN

The sinkholes of the Bükk plateau appear as climatic anomalies. Due to the sinkhole’s morphometry, their dish-like, concave geometry, they collect the cold air layers from their environment by gravity and further cool it by extreme radiation processes. Thus, they can be characterized by significantly lower minimum temperature compared to their surroundings, if the conditions of the build-up are given. Although, the build-up of the inversed air stratification is not regular in every case. Geomorphologic factors and the current surface coverage of the sinkhole influences the albedo of the surface, moreover it is directly exposed to solar radiation and external weather impact. The Institute of Geography and Geoinformatics of the University of Miskolc carries out measurements in the Mohos sinkhole of Zsidó meadow, which representatively provides an outstanding medium for the understanding of the microclimate of the sinkholes. The variety of the transitional seasons enables the observation of the presence of these extremities and their study for better understanding of these phenomenon. This article summarizes the results of the complex physical geographic and meteorological study carried out in the Mohos sinkhole in the fall of 2023. Based on the records of the National Meteorological Service, the investigated autumn season of 2023 had the highest national average temperature in Hungary since the beginning of the national measurements (1901). Despite of the extremely warm weather conditions, the minimum temperature in the sinkhole fell below zero 56 days (out of the 91 days of the season), and exceeded the -10ˇC on 11 days, -15ˇC three times, and reached the lowest recorded temperature at 19.9ˇC at the end of November. These numbers show the real extremity of the sinkhole’s microclimate.