The Antarctic puzzle is a good one. Obviously, due to much lower surface temperatures, ice and near freezing sea water, radiant and conductive heat loss would be less that any other location on Earth. The Antarctic should gain heat from the tropics as the tropics warm. The increase in conductivity thanks to the non-linear properties of Carbon Dioxide would explain part of the lack of warming, by allowing more heat transfer from surface without transferring as much heat to the lower atmosphere. At the point were radiant transfer of energy becomes more significant than conductive, the atmosphere should warm more significantly. That appears to be the case even with the rather poor data. But what the heck is happening with the CO2 concentration of the atmosphere?
There can be increased absorption of CO2 by the Antarctic ocean, but it would seem that would be more variable. There is a hint that the geomagnetic field plays some role in the stabilization of both temperature and CO2 concentration, which brings me back to a chemical impact, likely CO2 and O3 getting together either on their own or in combination with some other molecule to do some magnetic/electric stimulated reaction.
In plasmas, CO2 and CH4 enhance conductivity. The same basic interaction could be happening under Antarctic conditions, but in more of a law of large numbers kinda way. So how would I approach determining the magnitude of a weak magnetic field enhancement of a chemical reaction in an environment with crap for quality data?
I hate time series analysis, but maybe the ozone concentration versus mid troposphere temperature may offer some clue for an approach? I still doubt the energy of the chemical reaction will be significant, but it may link to a better indication of thermal/non thermal flux interaction. Weird stuff is happening.