REVISING THE CATALOG OF THE KORYAK HIGHLAND GLACIERS USING ARCHIVAL CORONA IMAGES AND COMPARISON WITH SENTINEL-2 IMAGES AGAINST THE BACKDROP OF CHANGING CLIMATE
M.D. Ananicheva1, A.A. Aleinikov2, Yu.M. Kononov1
1Institute of Geography, Russian Academy of Sciences, Moscow, Russia
2ScanEx Research Center, Moscow, Russia
Keywords: the Koryak Highlands, glacier, glacier area, temperature, precipitation, temperature trend, precipitation trend, rock glacier, CORONA, Sentinel-2 images
Abstract
In recent decades, glaciers in Northern Siberia and the Far East have been influenced by climate change, especially small forms of glaciation. This process is also typical for the glaciers of the Koryak Highlands. To assess the dynamics of glaciation in this region, data from CORONA (1972), Sentinel-2 (2019) images, and the USSR Glacier Catalog (mid-1960s) were used. The USSR Glacier Catalog of the Koryak Highlands was compiled based on data from topographic maps and aerial photographs. The number of glaciers included in this catalog is almost 2.5 times higher than the number of glaciers identified on satellite images. For the studied region, the new electronic catalog Glaciers of Russia records 890 glaciers with a total area of 296.29 km2. This region is abundant in rock glaciers, and apparently the USSR Glacier Catalog (and perhaps the new electronic inventory) mistook many rock glaciers for living glaciers at the time of its compilation. Therefore, the authors made a new estimate of glacier areas using CORONA images. The discrepancies between the areas of glaciers indicated in the Catalog and identified on satellite images were determined for groups of glaciers.
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