Trends of O3, HF and chlorine species as measured by ground-based FTIR at Kiruna and modelled by the KASIMA and SLIMCAT model - Barthlott, S.; Blumenstock, T.; Chipperfield, M.; Hase, F.; Kohlhepp, R.; Kramer, I.; Raffalski, U.; Reddmann, T.; Ruhnke, R. (2009)