Urban heat island (UHI) and climate change belong to two separate scientific fields
within meteorology nowadays. Climate change, however, may affect the characteristics
of UHI as well. Various atmospheric macrocirculation conditions determine the frequency
of certain weather conditions at a given area, thus they influence the frequency of
the occurrence of conditions advantageous for UHI development. In the present research,
the time series data of conditions advantageous for UHI (advantageous meteorological
conditions [AMC]) were determined in the case of Debrecen (Hungary) and similar patterns
existing in the AMC time series were searched in those of North Atlantic Oscillation,
East Atlantic Oscillation, East Atlantic (EA)/Western Russia (WR) Pattern and Scandinavian
Oscillation indices for the period between 1961 and 2010 using Gabor-Morlet wavelet
transformations. Several significantly coherent oscillations were found. The occurrence
frequency of AMC can be approximated from macrocirculation conditions in these periods,
according to the concept of heat island. These estimations are consistent with the
calculated AMC time series. This proves that there is some relationship between macrocirculation
and heat island development. Based on the results, using seasonal and climate models
the changes of UHIs at seasonal and climatic scales may become predictable.
