@Article{acpd-7-11561-2007, AUTHOR = {Toohey, M. and Quine, B. M. and Strong, K. and Bernath, P. F. and Boone, C. D. and Jonsson, A. I. and McElroy, C. T. and Walker, K. A. and Wunch, D.}, TITLE = {Balloon-borne radiometer measurement of Northern Hemisphere mid-latitude stratospheric HNO$_{3}$ profiles spanning 12 years}, JOURNAL = {Atmospheric Chemistry and Physics Discussions}, VOLUME = {7}, YEAR = {2007}, NUMBER = {4}, PAGES = {11561--11586}, URL = {http://www.atmos-chem-phys-discuss.net/7/11561/2007/}, ISSN = {1680-7367} }