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9:00 PM  April 4, 2019

TSU scientists found out how lake disappeared in the Arctic in a month

© с сайта ТГУTSU scientists found out how lake disappeared in the Arctic in a month

TOMSK, Apr 4 – RIA Tomsk. Scientists of Tomsk State University (TSU) explained the reason of lake disappearing in the Yamalo– Nenets Autonomous Okrug (YNAO) in 2016 in less than a month; this happened so quickly due to the large difference in height of the lake and the Taz Bay, the water went through the thawed soil, the press service of the university reported on Thursday.

Earlier it was reported that TSU scientists are studying the fertile soil in the depressions of the lakes of the Far North, which have disappeared due to the melting of permafrost and thermal erosion of the coast. Such basins are called khasyreys. Experts believe that research will help to create a system of efficient farming, primarily –  for growing feed for livestock and restoring damaged land in northern latitudes.

It is noted that the staff of the Laboratory for Biogeochemical and Remote Environment Monitoring Techniques of TSU discovered khasyreys in the YNAO using satellite images. Usually, the formation of khasyrey takes several decades. The same lake disappeared in one month in the summer of 2016, which was quite hot. To find out where the water left, the researchers went to the site. A survey of the basin showed that the lake went into the Gulf of Ob of the Kara Sea –  the Taz Bay through the thawed soil.

"Research within the framework of the project funded by the RSF (Russian Science Foundation –  Ed.), helped to obtain data on how fast the water descent depends on the difference between the lake and the receiving water body –  another lake, river or sea. In the case with the disappeared water body, this difference was very considerable –  about 15– 20 meters –  and, most importantly, sharp", –  is said in the statement.

It is noted that, according to scientists, in the past 30 years, the formation of khasyrey in the north has become much more active, the number of such sites has almost doubled. At the bottom of khasyrey there is a large amount of mineral substances that feed the plants, thanks to which in the tundra and forest tundra there appear "oases" with shrub– meadow vegetation.

It is added that in 2018 scientists took samples from ten swamps of the YNAO and found out that in the frozen part of the swamp the concentration of useful substances is 20– 70 times higher than on the surface. If the warming continues, that nutrients will pass into fertile soil. In 2019, the Arctic research will continue.

Наверх
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