ASSESSMENT OF THE IMPACT OF GLOBAL WARMING ON THE CLIMATE OF TATARSTAN
The article presents the results of assessing the features of climate change in the territory of Tatarstan under the influence of global warming. Annual and seasonal changes in air temperature and precipitation over the entire period by instrumental observations are considered. An increase in the rate of warming of the average annual air temperature from 0.1 ˚C per decade in the last century to 0.49 ˚C in the XXI century has been established. At the same time, the winter period warmed at a rate of 0.52˚C, and April-October - at a rate of 0.48˚C. The thermal resources of vegetation periods in the form of the sum of effective temperatures above 10 °C increased from the average annual 880°C to 1080°C. 3- and 6-7-year periodicities were found in the accumulation of the sum of effective temperatures above 10˚C, which facilitates the preparation of long-term forecasts for the region. Shifts of calendar dates and changes in the duration of the main agro-climatic periods were studied. Trends have been identified: an increase in precipitation in the form of snow by 70%, but a reduction in winter by 15 days, an increase in the duration of the period with an average daily air temperature above 10°C for 21 days, but a decrease in precipitation over the same period by 10%. Hydrothermal coefficients for the period 1981-2021 are calculated, precipitation trends and hydrothermal coefficient for vegetation are given, proving an increase in the aridity of the climate in Tatarstan.