Both the Arctic and Antarctic have a cold side and warm side. They also have complex under ice thermal water jive going on with funky high salt concentration brine that wont freeze and that kind of crap. They are floating on unfreezable water.

Any time someone talks about average temperatures or a temperature history in once place being representative of the whole, in relation to overall climate, they are likely trying to deceive you.

They love to erroneously mix-in-match average global or continental temperatures, with specific temperatures in specific locations (such as proxy ice cores).