@article{KHOSRAWI13_ACP, author = "F. Khosrawi and R. M{\"u}ller and J. Urban and M. H. Proffitt and G. Stiller and M. Kiefer and S. Lossow and D. Kinnison and F. Olschewski and M. Riese and D. Murtagh", title = "Assessment of the interannual variability and influence of the {QBO} and upwelling on tracer-tracer distributions of {N}$_2${O} and {O}$_3$ in the tropical lower stratosphere", journal= "Atmos. Chem. Phys.", volume = "13", number = "7", pages = "3619-3641", doi = "10.5194/acp-13-3619-2013", year = "2013" }