Model-based calculations of sub-moraine melting at Djankuat glacier

by

О.О. Rybak1,2, Е.А. Rybak1,2, I.А. Korneva1,3

1 Branch of Institute of Natural and Technical Systems, Sochi, Kurortny Ave., 99/18

E-mail: o.o.rybak@gmail.com

2 Sochi Scientific Research Centre, Russian Academy of Sciences, Sochi, Teatralnaya St., 8a

E–mail: elena.rybak@gmail.com

3 Institute of Global Climate and Ecology of Roshydromet and RAS, Moscow, Glebovskaya St., 20b

E–mail: comissa@mail.ru

DOI: 10.33075/2220-5861-2018-2-86-92

UDC 551.89 551.583.7

Abstract:

   Considerable areas on the surface of valley and complex valley glaciers in Central Caucasus are covered with debris. In order to correctly carry out prognostic calculations of glacial run-off, it is necessary to account for amplifying or insulating role of the debris layer (dependently on the thickness of the latter). We focus our study on Djankuat glacier, which is a typical one in the region because of its morphometrical properties. Besides, a map of debris thickness was built for Djankuat. We elaborated a special model block and carried out numerical experiments with real climatic conditions. Insulating role of the debris layer was confirmed. On average melting rate under debris cover reduced by the factor of two.

Keywords: Caucasus, mountain glacier, climate, debris layer, mass balance, mathematical model, monitoring, prediction.

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