Guest essay by Eric Worrall (see update below – Anthony)
h/t JoNova; Global warming appears to have brought near record cold to Scott Base in Antarctica, which a few days ago endured -81.7C / -115F, almost 4 degrees below the freezing point of Carbon Dioxide (-78C / -109F).
Scott Base crew enduring near-record breaking Antarctica winter – 10C colder than usual
Spare a thought for the hardy crew who are wintering down in Antarctica, experiencing near-record breaking cold temperatures.
They’ve come very near to the coldest ever recorded temperature of -89.6C.
While it may have been -16C when Newshub spoke with the Scott Base crew – that’s almost balmy conditions compared to the -81.7C recorded on the icy continent this week.
Antarctica New Zealand science tech Jamie McGaw says he “can’t even imagine that extreme cold”.
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NIWA Meteorologist Ben Noll says the polar vortex has “kept all of these cold temperatures locked in over the Antarctic continent, and they haven’t been able to really push north – whether it’s to Australia, New Zealand or South America – they’ve been kind of stuck here.”
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Read more (includes video): https://www.msn.com/en-nz/news/national/scott-base-crew-enduring-near-record-breaking-antarctica-winter-10c-colder-than-usual/ar-AALaP9s
Its worth noting temperature is only part of the equation The partial pressure of CO2 in the atmosphere is very low, the -78C freezing point really only applies when you have pure CO2 at 1 atmosphere (h/t Dave Middleton, Anthony Watts). At lower pressures or where CO2 is only a trace component (normal atmospheric conditions) sublimation (evaporation of the CO2 ice) appears to dominate, making it highly unlikely there would be any accumulation of CO2 ice.
Nevertheless it would have been fascinating to monitor atmospheric CO2 content as the temperature dropped.
I understand if no such experiments were conducted. Perhaps scientists have already examined this possibility in situ as well as in laboratory conditions, or perhaps during the depths of the recent chill the researchers were more focussed on other priorities, like preventing body appendages from freezing solid and dropping off.
UPDATE by Anthony: I edited the title, because it gives an incorrect impression. The original title read:
Global Warming? Scott Base Antarctica Endures -115F, Cold Enough To Freeze CO2
The revised title:
Global Warming? Scott Base Antarctica Endures -115F
While the -115F air temperature is below the freezing point of CO2 at -109F, CO2 WILL NOT FREEZE OUT OF THE AIR. The partial pressure of CO2 in our atmosphere is too low. We did an experiment back in 2009 that proved this.
Tony Heller, aka “Steve Goddard” still won’t admit to making a mistake on that issue, which is why he no longer posts here.
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Those icy catabatic winds from Antarctica are contributing to strong downwelling and formation of cold deep saline water which means cooling in the pipeline for the global climate.
https://ptolemy2.wordpress.com/2020/09/12/widespread-signals-of-southern-hemisphere-ocean-cooling-as-well-as-the-amoc/
https://ptolemy2.wordpress.com/2021/05/13/southern-hemisphere-sea-ice-now-extends-80-km-farther-north-than-prior-estimates/
It’s now well established that in parts of Antarctica over some seasons, the CO2 “greenhouse” effect turns negative and cools rather than worn:
Negative greenhouse effect over the high and cold Antarctic plateau – Odyssey (wordpress.com)
On interesting implication of this is that historic epochs of near-global glaciation, the so-called “snowball earth” episodes, cannot have been ended by CO2 increasing. Since increasing CO2 would cool, not warm, a snowball earth.
I won’t look into it, but I believe “high and cold” is an important aspect. Snowball Earth was mostly at sea level.
Ric
One of the reasons for a negative greenhouse effect over Antarctica is that the pure snow is whiter than cloud. Thus cloud cover decreases albedo, rather than increasing it as it does elsewhere. This effect is independent of altitude.
The partial pressure of CO2 might not be high enough to freeze into “dry ice”, but -115 F is much too cold to melt any H2O ice, as some warm-mongers are worried about! Anyone who ventured outside would create their own snowstorm when exhaling!
Assuming they don’t heat with solar panels or windmills, do they use coal, oil or NG? PS I’d want all three, plus 10 cord of cut, split and stacked Maine hardwood. ; )
It is cold enough to freeze CO2. It’s a headline. There is nothing wrong with that statement. It does not [did not] say ‘freeze co2 out of the air’. I think you’re being petty there. The whole point is that it is an unimaginably coldness to the vast majority of earthers.