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Jun 25, 2015 at 16:29 vote accept dot_Sp0T
Jun 23, 2015 at 12:08 comment added WhatRoughBeast @dot_Sp0T - "What geographic phenomena and/or meteorologic events would increase the pressure into these ranges?" None. 4 atmospheres of pressure is 60 psi.
Jun 23, 2015 at 10:41 comment added LSerni Stratification would mainly be a problem in enclosed spaces. Houses would need fans, for example. Deep wells and mineshafts even more so. It would be a very far reaching modification.
Jun 23, 2015 at 10:38 comment added LSerni You could get somewhat higher pressures inside a very deep caldera, and/or with a huge temperature inversion above say 400-500 feet. The air below would be still tolerably warm but the pressure some percents higher than normal. Not too healthy since you get less air renewal. Two centuries ago in London this sort of thing killed people.
Jun 23, 2015 at 8:51 comment added dot_Sp0T Now I need some help with atmospheres. What geographic phenomena and/or meteorologic events would increase the pressure into these ranges?
Jun 22, 2015 at 17:55 history answered WhatRoughBeast CC BY-SA 3.0