Springtime halogen oxidation determines the variability in surface ozone concentrations throughout the Arctic and subarctic.

Gilman, J.B.; Lerner, B.M.; Kuster, W.C.; Goldan, P.D.; Montzka, S.A.; Miller, B.R.; Miller, L.; Oltmans, S.J.; Ryerson, T.B.; Burkhart, J.F.; Stohl, A.; Williams, E.J.; deGouw, J.