That depends on what you mean by "overnight". To a climatologist or geologist, the answer is "yes". They just have a different concept of what overnight means than do the rest of us. To a geologist, "overnight" means hundreds of thousands of years. Thousands of years is not just overnight to a geologist, it is a blink of the eye. Climatologists have learned that the climate can sometimes switch modes "overnight" -- where overnight means several years to a century or more.Can A ice age occur overnight?
A small amount of icing on the rotor blades would be enough to cause big problems by screwing up the aerodynamics of the blades. That could well happen in a timescale of minutes. Aircraft anti-icing systems aren't designed to deal with temperatures as extreme as that. Even commercial jets cruising at 35,000 ft are only operating in temperatures of about -50 to -70C (-60 to -100F).The other inference of your question, a point I found cringeworthy in the film, is the idea that just because the air temperature is at -150 so everything instantly freezes up. Nice for the story line I suppose, but I guess the script writers hadn't considered the thermal inertia of air (very low) versus a lump of helicopter (very high). I guess it would begin to struggle, but I doubt if a helicopter that flew straight into a -150 air mass would not have time to land safely.
"But wouldn't the air warm as it descends?"
"No, it's moving too fast!"
Wichita, Kansas experienced a "heat burst" last night. Their temperature spiked from around 80 to 100 near midnight, then dropped back down. Their humidity went from around 55% to 7%, then back up, all in less than two hours.
On January 14th-15th, 1972, a National Weather Service cooperative observer site located in Loma, Montana recorded a 103F temperature rise (-54F to 49F) within twenty-four hours, thereby breaking the previous national record of 100F fall set on January 23-24th, 1916 in Browning, Montana.
Yes, at higher temperatures.A small amount of icing on the rotor blades would be enough to cause big problems by screwing up the aerodynamics of the blades. That could well happen in a timescale of minutes.
Right thou must be joking. I have seen the thermometer at -63C in Resolute Bay in Canada February 1989 and not a trace of such an event. But there were other interesting things to do with cooking water.In parts of Russia, the ambient can drop below -70C. At that temperature, your breath freezes instantly and falls to the ground as ice, you can hear it crackling as it freeezes and drops out of the air.
Mark TwainCold! If the thermometer had been an inch longer we'd have frozen to death.
http://www.islandnet.com/~see/weather/events/life-80.htmRight thou must be joking. I have seen the thermometer at -63C in Resolute Bay in Canada February 1989 and not a trace of such an event.