PERMAFROST-LANDSCAPE CONDITIONS IN THE ANABAR RIVER BASIN AT THE TUNDRA-WOODLAND INTERFACE UNDER CONDITIONS OF MODERN CLIMATE WARMING
S.V. Kalinicheva, N.N. Nikiforova, I.E. Misaylov, N.A. Plotnikov, A.N. Fedorov
Melnikov Permafrost Institute, Siberian Branch of the Russian Academy of Sciences, Yakutsk, Russia
Keywords: permafrost, permafrost landscapes, tundra, climate change, overgrowing of tundra with trees
Abstract
The results of studies carried out at the tundra-woodland interface in the Anabar region of the Republic of Sakha (Yakutia) in order to trace the dynamics of permafrost landscapes and identify the influence of vegetation on the soil temperature regime and seasonal thawing depth are presented. The overgrowing of tundra with larch trees took place during the second period of long-term warming in the Arctic (1979-2011). The displacement of tundra communities by woodland communities has changed permafrost conditions in the region. Thus, according to our data, the maximum depth of seasonal thawing is reached in the tundra area; the depth of seasonal thawing decreases with an increase in the woodland density. On the contrary, permafrost temperature has minimum values in the tundra area and increases under woodland. In this paper, the results of the first - stage of the study are presented. Further monitoring studies are planned in the area under consideration.
|
