Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2014, Vol. 11, No. 3, pp. 171-179
Remote study of landscape and latitudinal peculiarities of lakes dynamics in cryolithozone of Eastern Siberia
Yu.M. Polishchuk
1,2 , M.A. Kupriyanov
1 , N.A. Bryksina
3
1Ugra Research Institute of Information Technologies, Khanty-Mansiysk, Russia
2Institute of Petroleum Chemistry, Tomsk, Russia
3 Kant Baltic Federal University, Kaliningrad, Russia
Changes of lakes sizes in the Eastern Siberia permafrost was studied using multi-temporal Landsat satellite images over a period of about three decades. The studied 14 test sites are located in the subzone of continuous permafrost and related to different landscape zones of territory. From several hundred to several thousand lakes were determined at each test site and were measured the lakes’ areas on satellite images by means of a geographic information system ArcGIS 9.3. Study of changes in the total area of the lake, depending on the latitude zone of permafrost showed that the zone of continuous permafrost in Eastern Siberia can be conditionally divided into two latitudinal subzones: northern and southern subzones. It is shown that in the permafrost zone of Eastern Siberia the range of latitudes of values near 70° N is an area of transition from the trend of reduction of lakes' sizes to the trend of growth of sizes in the average with increasing latitude. In the northern subzone which is located at latitudes greater than 70° N, the average growth of the total area of lakes is observed. In the southern subzone at latitudes less than 70° N, a total area of lakes is reduced on the average. A landscape analysis of data on changing areas of thermokarst lakes was carried out. It is shown that the northern subzone of continuous permafrost zones of Eastern Siberia includes forest-tundra and subarctic tundra and southern subzone corresponds to taiga zone.
Keywords: permafrost, global warming, nonsimultaneous satellite images, test sites, continuous cryolithozone, landscape analysis, lake-marsh landscape, subarctic tundra, forest-tundra, Eastern Siberia
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