Aerosol nucleation in the winter Arctic and Antarctic stratospheres

Details Aerosol nucleation in the winter Arctic and Antarctic stratospheres Aerosol nucleation in the winter Arctic and Antarctic stratospheres

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..417h&link_type=abstract

Geophysical Research Letters, Supplement (ISSN 0094-8276), vol. 17, March 1990, p. 417-420.

Physics

12

Aerosols, Antarctic Regions, Arctic Regions, Condensation Nuclei, Stratosphere, Nitric Acid, Sulfuric Acid, Vapor Deposition, Winter

Scientific paper

The formation rate of sulfuric-acid-water aerosol particles is calculated as a function of altitude for the conditions of the winter Arctic and Antarctic stratospheres. The theoretical results indicate that sulfate particle formation can occur in the polar winter stratosphere. Conditions for new particle formation are increasingly favorable as the altitude increases between 20 and 30 km because of the decrease in surface area of preexisting particles and increasing sulfuric-acid vapor supply. The theoretical predictions are consistent with observations of a high-altitude CN layer over Antarctica in the spring. Available vapor-pressure data indicate that ternary particles composed of sulfuric acid, nitric acid, and water are not thermodynamically stable under winter stratospheric conditions.

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