Antarctica is a natural control for Atmospheric CO2. If there is anyplace on earth that a CO2 signature will be measured, it will be in the very very very dry and cold air of Antarctica. (BTW, note the variability of the temperature in the above graphic)
If there is anyplace on earth that is a natural control for the impact of increasing atmospheric CO2 it is Antarctica. Antarctica’s average winter temperature is -60 degrees Celsius which is close to the peak absorption of CO2 of -80 degree Celsius. Most importantly, however, is that the Antarctica air is very very very dry, so there is no impact from water vapor. The only significant GHG in the South Pole Troposphere is CO2.
New studies demonstrate that not only has Antarctica not been warming with an increase in CO2, it has actually been COOLING over the last 1,600 years.
A new study suggests temperatures across Antarctica have been falling for the last 1,600 years. This natural climate change would have been a threat to baby penguins, forcing them to walk much further across sea-ice for food.
More on the failed relationship between CO2 and temperature: More Scientific Evidence For CO2’s Dubious Climate Impact Emerges