As I understand it, the pingo process is a gradual subsidence over years or decades.basil_hayden wrote:If pingo ice pushes upward, there will be a ring of debris at the earth's surface. If said pingo ice melts, a hole forms, with water at the bottom. Eventually, the permafrost surrounding the former pingo ice will defrost and fill in the hole.
A deputy of the regional parliament - or duma - Mikhail Lapsui flew by helicopter to inspect the new Yamal crater. He said: "Its diameter is about 15 metres. "There is also ground outside, as if it was thrown as a result of an underground explosion.
"According to local residents, the hole formed on 27 September 2013.
basil_hayden wrote:similar structures are all around this one
basil_hayden wrote:If ... pingo ice melts, a hole forms, with water at the bottom.
Noted scientists tell RIR that the holes found on the Yamal Peninsula that have sparked so much interest on the internet have no known analogues on land, but could indicate a serious degradation of the permafrost, with global implications.
...
If they are sufficiently analogous to the holes in the Kara, Pechora, Barents and other seas (these are known by the scientific term ‘pockmarks’) and are formed as a result of natural gas explosions, then this could pose a significant threat.
Glaciologists from the sub-Arctic research and study unit in Tyumen say that permafrost temperatures are rising steadily in the region of the Bovanenkovskoye gas field on the Yamal Peninsula in the Russian Arctic, near where the first hole was discovered. Forty years ago it was on average about eight degrees below zero, but now in certain areas it is only minus three.
“Perhaps this is precisely why the process of releasing methane from crystalline ice traps started in the depths of the northern tundra,” wrote Ranks in an article published by the Slon.ru website.
Scholars noted that pieces of earth were scattered near the crater and at a distance of 328-394 feet, which indicates that rather than collapsing, rock was in fact ejected. Moreover, traces of charring, scorching, or any other evidence indicating a thermal explosion have not been found, so the possibility of a meteorite can be ruled out. Scientists believe that the frozen earth was smashed outwards by powerful pressure from below.
Cid_Yama wrote:The laymen and journalists are using the term explosion. The scientists are using the terms ejection or expulsion.
Map here:Cid_Yama wrote: Bovanenkovskoye gas field
Forty years ago it was on average about eight degrees below zero, but now in certain areas it is only minus three.
“Perhaps this is precisely why the process of releasing methane from crystalline ice traps(methane hydrate dissociation) started in the depths of the northern tundra,” wrote Ranks in an article published by the Slon.ru website.
dohboi wrote:bh, all the folks looking at these that I've heard of say these are new--no old plant growth in or on them, among other things. Do you have evidence to the contrary?
Plantagenet wrote:No they're not. These kinds of huge pits surrounded by ejected debris are something new. Nothing like this has ever been found before.
dohboi wrote:Riiight, so now you're parroting rd who is parroting WUWT. Thanks, you have saved me a lot of time since I don't need to read your posts anymore.
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