VARIABILITY OF SNOW COVER MOISTURE RESERVE IN THE FOOTHILLS OF THE EASTERN SAYAN WITH THE BACKGROUND OF CLIMATE SHIFTS
E. F. Tropina1, A. A. Knorre1,2, M. G. Erunova1,3, M. K. Tselikhin2
1National Park Krasnoyarsk Stolby, Krasnoyarsk, Russian Federation
2Siberian Federal University, Krasnoyarsk, Russian Federation
3Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of Science, Krasnoyarsk, Russian Federation
Keywords: water storage in snow cover, bioclimatic zones, climate change, winter period, GIS technologies, National Park Krasnoyarsk Stolby
Abstract
Long-term data on variations in snow cover parameters in the subtaiga and mountain-taiga group of forests in the protected area of the National Park Krasnoyarsk Stolby are presented. A significant reduction in the period of occurrence of stable snow cover (~ 20 days) was revealed due to later snow formation and earlier melting. To evaluate the water storage in snow, we use the thickness of the snow cover ( r = 0.74-0.96; p < 0.001) in specific conditions for period 2018-2023. According of our estimation the territory with snow depths in the intervals of 50-70 cm ( V , % < 50) is identified as a most stable areas (from 52 to 71 % of all protected area) in different years, except for 2021 yrs. (only 28 % of the territory) with the critically low amount of the snow. The total amount of the water storage in snow at the beginning of snowmelt, depending on the weather conditions of a different years, varied from 46.6 to 89.7 · 106 m3 with an average weighted water storage per unit area from 98.8 to 190.1 mm. The presented data are comparable with those previously published for other territories of the Krasnoyarsk region (Burenina et al., 2013) and Siberia (Report..., 2019-2023), which makes it possible to further in-depth analysis of the relationship between evaluated data on water storage in snow and climatic parameters of the environment in longer time scale.
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