Scientists from Tyumen exclude human participation in formation of the funnel in Yamal
7:34 30 сентября 2014
Категории: News in English
Scientists from Tyumen exclude participation of humans, falling of a meteorite and gas explosion in formation of the funnel on the Yamal Peninsula, which was the subject of much debate in the scientific community this summer.
A scientific employee of the Institute of the Earth Cryosphere, the Siberian Branch of Russian Academy of Sciences, Marina Leibman, who had visited twice the site of the mysterious event, presented her hypothesis of creation of the funnel on the round table «The risks of development of the Arctic territories» in the Tyumen Oil and Gas University. According to her words, it is unlikely that the emission of gas from big depths is the source, and it is absolutely exactly that humans did not take a hand in its appearing, and one can not seriously consider the hypothesis of falling of a meteorite or gas explosion — scientists measured radiation background, the figures were normal.
As she notes, her theory of appearing of the funnel is based on similarity with formations, which are the results of gassing from permafrost, as Marina Leibman explains. This gassing is connected with existence of layer underground ices and the response of permafrost to climate changes.
The most consistent mechanisms explaining the phenomenon are: increase of temperature of rocks during the latest ten years. Thawing of walls of the upper part of the funnel leads to expansion of the hole, and in the end, to formation of a lake. Perhaps some of lakes in Yamal previously considered thermokarst are the result of a similar process. In the opinion of the expert, the special role played in formation of the funnel is not so much a trend of rising temperatures but of extreme values in 2012. It is logical that they can be repeated, and formation of such funnels can also spread to other areas, as she notes.
During the first expedition, the scientists lowered a video-camera into the funnel. The video shown that water was situated very deep, a wall was uneven. The earth rampart reached the height of four meters, consisted of lumps of clay, in some places with gravels. The width of the earth rampart reached 25 meters, the outer diameter — 60 meters. Soil from the funnel scatters very far: small lumps on the distance up to 120 meters, and grass layers flew away much further. On the 25th of August, when scientists repeated measurements, the diameter of the funnel increased up to 35 meters. The depth up to the water decreased from more than 50 to 35 meters. The walls of the funnel were washed, and the cut became visible in details.
Marina Leibman adds that the funnel in the near future, more likely, will be filled with water, and the large scientific expedition would not have an opportunity to study more details. It needs to switch attention to research of lakes and also to forecasting and finding of places, where formation of new such funnels is possible.