nostr:npub1a6d6knkr9kn8f4fhe8kx2kta7pq8jxsajamy4mmpvwj6382dfhfqpca8sd This was a combination of poleward heat transport in the Arctic (https://www.worldweatherattribution.org/north-pole-nov-dec-2016/) and a sudden shit in Antarctic sea ice levels (https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017GL074691).