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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2025, V. 22, No. 2, pp. 145-153

Seasonal and interannual variability of snow cover area of the Kodar Range (Transbaikalie)

E.Yu. Osipov 1 
1 Limnological Institute SB RAS, Irkutsk, Russia
Accepted: 04.03.2025
DOI: 10.21046/2070-7401-2025-22-2-145-153
Quantitative assessment of snow cover area variability in mountain basins is important for understanding the mechanisms of functioning of hydrological processes and other components of the natural environment, as well as for timely forecasting of such dangerous phenomena as spring-summer floods. The Kodar Range is located in the zone of influence of the Baikal–Amur Mainline, an important infrastructure facility of international importance, but up to now the modern dynamics of snow cover in this area has not been practically studied. In this paper, we have studied seasonal and interannual changes in the snow cover area of the Kodar Range with a monthly resolution. MODIS/Terra (MOD10A1 product) and Landsat-8/9 OLI medium spatial resolution remote sensing data for the period 2018–2023 were used for the analysis. During the study period, the snow cover varied from 88 km2 (August 2019) to 16,371 km2 (April 2023). It was found that snow accumulation at Kodar Range starts in the first decade of September and reaches its annual maximum in the second decade of April. The snowmelt period continues up to the first decade of July. The multi-year trends (2019–2023) reveal a statistically significant increase in the snow cover area in April (by 775 km2 yr–1). In addition, there is a tendency for a decrease in snow cover duration and an increase in its melting rate.
Keywords: Kodar Range, snow cover, remote sensing, Landsat, MODIS, seasonal changes, interannual trends
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