The Arctic is so warm and has been this warm for so longthat scientists are struggling to explain it and are in disbelief. The climate of the Arctic is known to oscillate wildly, but scientists say this warmth is so extremethat humans surely have their hands in it and may well be changing how it operates.
https://www.washingtonpost.com/amphtml/news/capital-weather-gang/wp/2017/02/01/beyond-the-extreme-scientists-marvel-at-increasingly-non-natural-arctic-warmth/