The Climate Factor in the Dynamics of Exogenous Processes in the Southwestern Baikal Region
Авторы статьи выражают глубокую признательность за помощь в подготовке статьи начальнику отдела фонда данных ФГБУ «Иркутское УГМС» Кузнецовой Н.А. и программисту Центра новых информационных технологий ФГБОУ ВО «Иркутский государственный университет» Намаконову А.Ю.
DOI:
https://doi.org/10.52575/2712-7443-2026-50-1-47-61Keywords:
climate, exogenous morphogenesis, aeolian processes, water erosion, seasonal and long-term dynamics, Baikal region, deflation potentialAbstract
An analysis was conducted to investigate the role of climate in contemporary exogenous geomorphological processes along the southwestern coast of Lake Baikal. Despite numerous papers on the relationship between climate and exogenous processes published in Russia and internationally over the years, recent shifts in climatic conditions have spurred renewed interest in this research area. The objective of our study was to assess the contribution of the climatic factor to the functioning and dynamics of exogenous processes in the insular steppes of the Baikal region. The study area encompasses a polydominant landscape, representing one of the most arid and ecologically sensitive regions in the rain shadow of the Primorsky Range within the Baikal area. Through the application of rigorous methodologies, including stationary and transect-based monitoring, complemented by field experiments, long-term (2000 to present) investigations of geomorphological systems have yielded a significant dataset. This dataset has allowed for the elucidation of regional-scale regularities governing climatic and geomorphological regimes, and the analysis of both seasonal and long-term process dynamics. From 2000 to 2025, warm and moderately humid climatic conditions predominated in the Baikal region, although extreme deviations towards both wetter and drier conditions were also observed. Our findings show that the study site is characterized by semi-humid conditions, which favor erosional processes (fluvial and aeolian). During periods of drought, aeolian processes are intensified, leading to an increase in aeolian accumulation (exceeding 100 g/m2) and elevated atmospheric dust concentrations (ranging from 8 mg/m3 to 95 mg/m3). The heightened intensity of geomorphological processes, driven by significant human activities, results in an elevated volume of unconsolidated material entering the lake, thereby causing a decline in the ecological status.
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Список источников
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