What determines the intensity change of an Arctic cyclone?

Zhuo Wang1, Mingshi Yang2, Robert Rauber2 and John E Walsh3, (1)University of Illinois at Urbana Champaign, Urbana, United States, (2)University of Illinois at Urbana-Champaign, Department of Atmospheric Sciences, Urbana, United States, (3)University of Alaska Fairbanks, Fairbanks, AK, United States