Law, K., A. Stohl, P. Quinn, C. Brock, J. Burkhart, J.-D. Paris, G. Ancellet, H.B. Singh, A.E. Roiger, H.G. Schlager, J.E. Dibb, D.J. Jacob, S. Arnold, J. Pelon, and J. Thomas (2014), Arctic Air Pollution: New Insights from POLARCAT-IPY, Bull. Am. Meteorol. Soc.(submitted).