Observed and modelled record ozone decline over the Arctic during winter/spring 2011.

Balis, D.; Isaksen, I.S.A.; Zerefos, C.; Zyrichidou, I.; Eleftheratos, K.; Tourpali, K.; Bojkov, R.; Rognerud, B.; Stordal, F.; Søvde, O.A.; Orsolini, Y.