THE IMPACT OF THE PROCESSES OF THERMal DENUDATION ON THE IONIC COMPOSITION OF SMALL LAKES IN CENTRAL YAMAL
N.U. Fakashchuk1, Yu.A. Dvornikov2,3, O.L. Opokina1,4, A.V. Khomutov1
1Earth Cryosphere Institute, Tyumen Scientific Centre, Siberian Branch of the Russian Academy of Sciences, Tyumen, Russia
2Peoples’ Friendship University of Russia, Moscow, Russia
3Arctic and Antarctic Research Institute, Saint-Petersburg, Russia
4Tyumen Industrial University, Tyumen, Russia
Keywords: thermal denudation, small tundra lakes, hydrochemistry, ionic composition, climate changes, Yamal peninsula
Abstract
Hydrochemical monitoring of inland waters makes it possible to obtain information about their state and to assess the influence of climatic factors on the regime of water reservoirs. In the recent decade, relevance of the research related to the impact of permafrost thaw on the state of small lakes in the Arctic has been growing. The influence of interannual fluctuations in air temperature and precipitation on the ionic composition of lakes has been statistically established for the contents of NO2, SO4, and NO3 ions. Active thermodenudation on the shores of these lakes increases water mineralization levels by an average of 42.8 % and changes the concentrations of major ions Na, Ca, Mg, K, PO4, and HCO3.
|
