@article{TILMES03_GRL, author = "S. Tilmes and R. M{\"u}ller and J.-U. Groo{\ss} and M. H{\"o}pfner and G. C. Toon and J. M. {Russell III}", title = "Very early chlorine activation and ozone loss in the {A}rctic winter 2002--2003", journal= "Geophys. Res. Lett.", volume = "30", number = "23", eid = "2201", doi = "10.1029/2003GL018079", year = "2003" }