THE GLACIER COMPLEXES OF THE MOUNTAIN MASSIFS OF THE NORTH-WEST OF INNER ASIA AND THEIR DYNAMICS
https://doi.org/10.24057/2071-9388-2011-4-2-4-21
Abstract
The subject of this paper is the glaciation of the mountain massifs Mongun-Taiga, Tavan-Boghd-Ola, Turgeni-Nuru, and Harhira-Nuru. The glaciation is represented mostly by small forms that sometimes form a single complex of dome-shaped peaks. According to the authors, the modern glaciated area of the mountain massifs is 21.2 km2(Tavan-Boghd-Ola), 20.3 km2 (Mongun-Taiga), 42 km2 (Turgeni-Nuru), and 33.1 km2 (Harhira-Nuru).
The area of the glaciers has been shrinking since the mid 1960’s. In 1995–2008, the rate of reduction of the glaciers’ area has grown considerably: valley glaciers were rapidly degrading and splitting; accumulation of morainic material in the lower parts of the glaciers accelerated. Small glaciers transformed into snowfields and rock glaciers. There has been also a degradation of the highest parts of the glaciers and the collapse of the glacial complexes with a single zone of accumulation into isolated from each other glaciers. Reduced snow cover area has led to a rise in the firn line and the disintegration of a common accumulation area of the glacial complex. In the of the Mongun-Taiga massif, in 1995–2008, the firn line rose by 200–300 m. The reduction of the glaciers significantly lagged behind the change in the position of the accumulation area boundary. In the past two years, there has been a significant recovery of the glaciers that could eventually lead to their slower degradation or stabilization of the glaciers in the study area.
The area of the glaciers has been shrinking since the mid 1960’s. In 1995–2008, the rate of reduction of the glaciers’ area has grown considerably: valley glaciers were rapidly degrading and splitting; accumulation of morainic material in the lower parts of the glaciers accelerated. Small glaciers transformed into snowfields and rock glaciers. There has been also a degradation of the highest parts of the glaciers and the collapse of the glacial complexes with a single zone of accumulation into isolated from each other glaciers. Reduced snow cover area has led to a rise in the firn line and the disintegration of a common accumulation area of the glacial complex. In the of the Mongun-Taiga massif, in 1995–2008, the firn line rose by 200–300 m. The reduction of the glaciers significantly lagged behind the change in the position of the accumulation area boundary. In the past two years, there has been a significant recovery of the glaciers that could eventually lead to their slower degradation or stabilization of the glaciers in the study area.
About the Authors
Kirill ChistyakovRussian Federation
Faculty of Geography and Geoecology, St. Petersburg State University, St. Petersburg 199178, 10 line Vasilievsky Ostrov, 33/35
Dmitry Ganyushkin
Russian Federation
Faculty of Geography and Geoecology, St. Petersburg State University, St. Petersburg 199178, 10 line Vasilievsky Ostrov, 33/35
Igor Moskalenko
Russian Federation
Faculty of Geography and Geoecology, St. Petersburg State University, St. Petersburg 199178, 10 line Vasilievsky Ostrov, 33/35
Wolf-Christian Dullo
Russian Federation
GEOMAR, Helmholtz-Zentrum für Ozeanforschung Kiel, Germany, 24148 Kiel, Wischhofstr. 1-3
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Review
For citations:
Chistyakov K., Ganyushkin D., Moskalenko I., Dullo W. THE GLACIER COMPLEXES OF THE MOUNTAIN MASSIFS OF THE NORTH-WEST OF INNER ASIA AND THEIR DYNAMICS. GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY. 2011;4(2):4-21. https://doi.org/10.24057/2071-9388-2011-4-2-4-21
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