Scientists will control sources of gas emissions on the Yamal peninsula
9:00 22 марта 2017
Категории: News in English
Comments were given in the department on science and innovations of Yamal-Nenets Autonomous Okrug on messages in mass media about “underground gas bubbles”.
According to the words of the director of the department Aleksey Titovskiy, the talk was not about underground gas bubbles but about sources of gas emissions and surface gas seeps on the territory of the region being studied by scientists from various research institutes of the Russian Academy of Sciences.
As we should remind, some federal mass media wrote that in Yamal the scientists had found many sources of gas emissions and surface gas seeps. The journalists mistakenly called them gas bubbles. As Aleksey Titovskiy explains to a correspondent of the news agency “Sever-Press”, the problem is not in number of these natural phenomena, which are characteristic not only to the Arctic. It needs to think, which of them can be the threat, as he says. The methodology that allows defining dangerous pingos and their stage of heaving is being elaborated in the region. The scientists are busy with defining of signs: limits of a pingo height, maximum pressure that the ground can withstand. It will help to forecast a blow up and to minimize its consequences.
An expert of the Institute of the Earth’s Cryosphere at the Siberian branch of the RAS, doctor of geological-mineralogical sciences Marina Leibman explains that during the latest years cryogenic processes take place on the peninsula; they are provoked with abrupt fluctuations in temperatures and previously not observed far from sea coast. The first group includes abrupt activation of thermo-denudation – formation of thermo-cirques, in other words semicircular depressions on banks of lakes as a result of thawing of underground ice and sliding of liquefied rocks down slopes into lakes. The second group includes deep and narrow craters called funnels of gas emissions in conformity with the main hypothesis of their origin.
Last year Yamal differed with very warm summer season, thus, this year expedition will focus on assessment of changes related to this warming. There is a possibility of activation of cryogenic processes. Probably, the area of thermo-cirques will increase; temperature of rocks and depth of seasonal thawing will grow, as Marina Leibman says.
The scientists never faced such natural phenomena as underground gas bubbles. Cryogenic processes, which are well understood and have scientific explanations, take place on the peninsula. All of them are the subject of constant monitoring on geocryological stations in the region.
As we should add, other unusual phenomenon is called “gas bubbles” in ordinary parlance. It was registered in July of 2016 on Beliy Island, when turf swelled in the abnormally hot summer in the result of permafrost thawing. It was registered only once. In total the scientists counted a dozen such small bubbles on the surface.