Dynamics and Modern Temperature Regime of Calendar Summer over Stavropol Height

Introduction. The article is devoted to calculation and analysis dynamics and modern temperature regime of calendar summer of over Stavropol height, which is one the main ground features of the Central Pre-Caucasus. At the end of the last and the beginning of this century, there was almost unanimous opinion on the unique and universal «global» warming. Later, with the expansion of thematic integrated approach, the understanding of the problem has significantly enhanced and changed. To the present day the most common is an idea that the main contribution into increasing of average year air temperature gives the winter season. Within the period of 1970-2019, every year the mean annual temperature in Stavropol region showed a considerable positive anomaly, which in certain years exceeded 2°C above the climatic normal on the average across the territory of the region. The main focus of the present article is focused on the study result of the summer air temperature change and its effects on the increasing of average year air temperature. Materials and methods of the research. Some characteristic features of air temperature variations according to the observation data of the weather station Stavropol for the period of 1921 -2020 are analyzed. The characteristic of prevailing tendency of long-term air temperature variations are given. The trend of the average air temperature are estimated by the regression analysis. The results of the study and their discussion. It was made the detail analysis temperature regime for all summer months, including of average and extreme air temperature, the frequency of days with air temperature higher/lower of certain degree, variations of months and season air temperature and temperature gradients across the absolute maximum and absolute minimum for all summer months over the last 20 years. Conclusions. The increasing of summer air temperature and its large contribution into the increasing of average year air temperature are shown. For practical purposes it is proposed to use the wide range of modern air temperature characteristics of summer season.