Lecture Frozen-in anticyclones inter-annual variability in the Arctic middle atmosphere over the period 1960-2011. Thieblemont, R.; Orsolini, Y. J.; Huret, N.; Hauchecorne, A.; Drouin, M.-A. Publication details Poster presented at Quadriennal O3 Symposium,Toronto (Canada), 27-31 August 2012.