Freak US winters linked to Arctic warming

Recent spells of unusually cold winter weather in the United States and other parts of the Northern Hemisphere could be a paradoxical consequence of the climate warming in the Arctic, according to a study based on decades of atmospheric observations. However, it is still unclear whether this represents a long-term trend that will persist as the world heats up.

The Arctic s rate of warming is twice that for Earth as a whole, and some climate researchers have long suspected that this rapid Arctic warming can trigger anomalies in the winds around the North Pole, with consequences for weather thousands of kilometres farther south.

via www.nature.com

Is there anything that counts as evidence of global cooling? Asking for a friend.