Abstract
The provision of heat and moisture are key factors in the issues of vegetation of forest ecosystems. The purpose of the study is to analyze the behavior of the main meteorological parameters in various local conditions, to identify patterns in their temporal course. The data of observations at the meteorological station of Roshydromet, located in the northern part of the city of Kazan, and the automatic station at the forest site of the carbon polygon “Carbon-Povolzhye” in Zelenodolsk district of the Republic of Tatarstan in the period from 01.12.2022 to 31.01.2024 were compared. The selected meteorological stations are located in different conditions, and the terrain features are reflected in the change of meteorological parameters. During the period under review, the influence of the city proximity on temperature differences was noted - the average annual air temperature at the testing site is 1.05℃ lower than at the meteorological station in Kazan. In May and June the temperature difference reached 1.9℃, the differences in winter are less significant (on average 0.5℃). The study of differences between the regimes of meteorological parameters in forest ecosystems is becoming especially relevant in the context of a changing climate and an increasing risk of forest fires. The forest edge conditions are characterized by a high degree of horizon closure-wind shadow. In the annual cycle at the carbon polygon, days (16 days) with a maximum wind speed of > 10 m/s were identified, the vast majority of them occur in the autumn-winter period. No significant differences in cloudiness were revealed between the meteorological stations. During the period under review, there were no cases of heavy precipitation exceeding 15 mm/12 hours. An assessment of the degree of aridity of the vegetation using the Selyaninov hydrothermal coefficient showed that the growing season of 2023 was characterized by arid conditions.
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