The loss of Arctic sea ice has been a conspicuous hallmark of climate change. But the rate of loss slowed after sea ice extent hit a record low in summer 2012, even though global and Arctic warming continued unabated. New research by an international team of scientists explains what’s behind that perplexing trend. The findings indicate that the stall is linked to an atmospheric wind pattern known as the Arctic dipole, and that stronger declines in sea ice extent will likely resume when the dipole reverses itself in its naturally recurring cycle.

The many environmental responses to the Arctic dipole are described in a paper published recently in the journal