Why don't we see the atmosphere warm at the South Pole in response to increased CO2 concentration?

[Ottawa Mike]

A potential hypothesis is that CO2 warming requires a water vapor feedback which is not present in region of Antarctica.

Although, I had thought that water vapor levels were low in Antarctica specifically because of the lack of warming. One might think that the above hypothesis would lead the runaway warming in other regions.

An alternative hypothesis might be that solar insolation and ocean currents have larger effect on climate than CO2 (or water vapor). That might account for differences between the two poles.

(kudos for the gcnp58 hashtag)