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Nitrogen‐sulfur compounds in stratospheric aerosols

1978; American Geophysical Union; Volume: 83; Issue: C12 Linguagem: Inglês

10.1029/jc083ic12p06207

2156-2202

N. H. Farlow, K. G. Snetsinger, Dennis M. Hayes, Homer Y. Lem, Bernadine M. Tooper,

Atmospheric and Environmental Gas Dynamics

Two forms of nitrosyl sulfuric acid (NOHSO 4 and NOHS 2 O 7 ) have been tentatively identified in stratospheric aerosols. The first of these can be formed either directly from gas reactions of NO 2 with SO 2 or by gas‐particle interactions between NO 2 and H 2 SO 4 . The second product may form when SO 3 is involved. Estimates based on these reactions suggest that the maximum quantity of NO that might be absorbed in stratospheric aerosols could vary from one‐third to twice the amount of NO in the surrounding air. If these reactions occur in the stratosphere, then a mechanism exists for removing nitrogen oxides from that region by aerosol particle fallout. This process may typify another natural means that helps cleanse the lower stratosphere of excessive pollutants.