Matviienko M. Simulation of microclimate and bioclimatic conditions of big cities in summer months

The dissertation study concerns the assessment of the microclimate and bioclimatic conditions of big cities of Ukraine applying new methodological approaches and technological tools based on the latest software products with a high spatial resolution aimed at calculating radiation flows in a complex urban environment. The research analyzes literary sources and describes the theoretical foundations of climate formation in cities. The main factors of changes in radiation and heat balances of the city are considered. The peculiarities of the urban heat island (UHI) formation, the factors that determine its intensity, spatial and vertical structure are described. The factors that shape the features of temperature fields and air humidity within big cities are summarized. The peculiarities of the wind regime of the urbanized environment are characterized. It was established that if at the initial stages of the climate research of cities there was an accumulation of knowledge about the peculiarities of the microclimate and the regularities of processes on the basis of field measurements and comparisons of the values of meteorological parameters "city-suburb", then in the modern period urban meteorological studies are mainly based on the modeling of atmospheric processes and micro- and bioclimatic features, both of cities in general and of their separate areas. It is shown that the results of previous studies of microclimate characteristics in different types of buildings and at different levels of the greening of the city territories became the basis for the development of a number of classifications of urban spaces. The most famous and most used today is the classification of local climate zones (LCZ) by I. Stewart and T. Oke. The study specifies the characteristics of all 17 LCZ by which they can be identified within the urbanized environment.