Atmospheric Chemistry and Physics www.atmos-chem-phys.net 1680-7316 1680-7324 8 24 2008 10.5194/acp-8-7451-2008 http://www.atmos-chem-phys.net/8/7451/2008/ http://www.atmos-chem-phys.net/8/7451/2008/acp-8-7451-2008.html http://www.atmos-chem-phys.net/8/7451/2008/acp-8-7451-2008.pdf 7451 7463 2008-12-15 The role of ice in N₂O₅ heterogeneous hydrolysis at high latitudes R. L. Apodaca D. M. Huff W. R. Simpson Department of Chemistry and Biochemistry and Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska, 99 775-6160, USA We report evidence for ice catalyzing N₂O₅ heterogeneous hydrolysis from a study conducted near Fairbanks, Alaska in November 2007. Mixing ratios of N₂O₅, NO, NO₂, and ozone are reported and are used to determine steady state N₂O₅ lifetimes. 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