Published in
Stockholm University Press, Tellus B: Chemical and Physical Meteorology, 2(35B), p. 155-159, 1983
DOI: 10.1111/j.1600-0889.1983.tb00019.x
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An investigation of the atmospheric HNO3–NH3–NH4NO3 equilibrium in a cool, humid climate
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Abstract
Simultaneous measurements of gaseous nitric acid and ammonia were made during summer, autumn and winter months in North-West England. Concentrations of HNO3 and NH3 lay within the ranges 0.03-0.36 ppb and 0.9-5.1 ppb respectively, gaseous HNO3 accounting for only about 12% of total nitrate. Under the high humidity conditions prevalent during the work. the concentration data are consistent with the equilibrium of gaseous HNO3 and NH3 with solution droplets of NH4NO3.