Sounds like we have a positive feedback loop. 1) Study above says change in weather pattern drives the reduction of sea ice 2) Less sea ice leads to a weaker Polar Vortex. This article was cited in the references → https://www.nature.com/articles/ncomms5646 3) A weaker Polar Vortex leads to more arctic outbreaks. So the arctic is warming primarily because weather patterns have changed. leading to less sea ice, which weakens the polar vortex and leads to the mid-latitude cold blasts? Is this this study falling short of saying that?