Arctic air pollution: New insights from POLARCAT-IPY.

Law, K.S.; Stohl, A.; Quinn, P.K.; Brock, C.; Burkhart, J.; Paris, J.-D.; Ancellet, G.; Singh, H.B.; Roiger, A.; Schlager, H.; Dibb, J.; Jacob, D.J.; Arnold, S.R.; Pelon, J.; Thomas, J.L.