This study presents three simulations of atmospheric chemistry with the Belgian Assimilation System for Chemical Observations chemistry transport model, driven by different meteorological data sets. Newly implemented SF₆ chemistry enables stratospheric transport studies. Results agree with satellite observations. The derived lifetimes of six trace gases agree with the literature, but SF₆ shows larger sensitivity to the choice of meteorology. The lifetime of SF₆ ranges from 1900 to 2600 years.