ANALYSIS OF THE CLIMATIC DEFLATION INDICATOR DYNAMICS ON THE EXAMPLE OF ERZIN WEATHER STATION DATA

Abstract

Link for citation: Kozlova I.V., Zenkova Zh.N., Kvasnikova Z.N. Analysis of the climatic deflation indicator dynamics on the example of Erzin weather station data. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 9, рр. 154-162. In Rus. The relevance of the research is caused by the need to identify factors affecting the development of deflationary processes of arid geosystems of the Tuva Republic. This will allow us to propose further measures to reduce the degradation of agricultural land and minimize the development of land desertification. Objective: assessment of climatic conditions and identification of anthropogenic factors of the potential danger of deflation to monitor changes in vulnerable geosystems and natural and anthropogenic processes. Objects: a section of the north-eastern (Russian) part of the Ubsunur basin within the Erzinsky district of the Tuva Republic. Methods: statistical analysis, regressions, moving average, comparative geographical method, interpretation of satellite images. Results. The dynamics of the climatic index of deflation based on the data of the Erzin weather station for 1966–2020 is analyzed; graphs of changes in the temperature regime, the amount of precipitation, wind speed are plotted; a linear trend of the distribution of the average annual temperature is revealed; coefficients of the climatic index of deflation and aridity indices are determined, graphs of their dynamics for the period under study are plotted; a tendency to weaken deflation is revealed; the studied landscapes are subarid on average, and according to the index fluctuation – from weakly arid (0,6–0,8) to arid (0,3) and subarid (0,5 –0,6).