Condensation of HNO3 and HCl in the winter polar stratospheres

Details Condensation of HNO3 and HCl in the winter polar stratospheres Condensation of HNO3 and HCl in the winter polar stratospheres

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13.1284t&link_type=abstract

Geophysical Research Letters (Supplement) (ISSN 0094-8276), vol. 13, Nov. 1986, p. 1284-1287.

Physics

67

Condensation, Hydrochloric Acid, Nitric Acid, Polar Regions, Stratosphere, Winter, Clouds, Ice Clouds, Nitrogen Oxides, Ozone, Ozone Depletion, Partial Pressure, Photochemical Reactions

Scientific paper

Nitric acid and hydrochloric acid vapors may condense in the winter polar stratospheres. Nitric acid clouds, unlike water ice clouds, would form at the temperatures at which polar stratospheric clouds (PSCs) are observed and would have optical depths of the magnitude observed suggesting that HNO3 is a dominant component of PSCs. ClO, N2O5 and ClNO3 may react on cloud particle surfaces yielding additional HNO3, HCl, and HOCL. In the vicinity of PSCs these reactions could deplete the stratosphere of photochemically active NO(x) species. The sedimentation of PSCs may remove these materials from the stratosphere. The loss of vapor phase NO(x) might allow halogen-based chemistry to create the ozone hole.

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