Climate-Induced Lake Dynamics in the Trans-Baikal Forest-Steppe Ecotone
S. T. IM1,2,3, V. I. KHARUK1,2, N. M. RAKITYANSKAYA2, A. S. GOLYUKOV2
1V. N. Sukachev Institute of Forest, SB RAS, 660036, Krasnoyarsk, Academgorodok, 50/28
2Siberian Federal University, 660041, Krasnoyarsk, Svobodnii ave., 79
3M. F. Reshetnev Siberian State Aerospace University, 660014, Krasnoyarsk, Krasnoyarskii rabochii ave., 31
Keywords: lake dynаmics, Trans-Baikal forest-steppe, Landsat, GRACE, altimetry, SPEI
Abstract
Quantitative dynamics, water surface area, and water level of lakes in the Trans-Baikal forest-steppe zone were studied by means of spectroradiometry (Landsat satellite), gravimetry (GRACE satellite) and altimetry (Envisat satellite). The number of lakes and their water surface area correlated with precipitation (r2 = 0.84–0.85), summer and annual temperature (r2= −0.77…−0.9) and drought index (r2 = 0.95…0.97). During extremely dry periods (2006–2010) the number of lakes decreased by four (compared to 1989) and their water surface area decreased by three (compared to 2000) were observed. The rate of change in the water level of the lakes (~29 years) was determined.
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