On the influence of polar stratospheric cloud formation on chemical composition during the 1988/89 Arctic winter

Details On the influence of polar stratospheric cloud formation on chemical composition during the 1988/89 Arctic winter On the influence of polar stratospheric cloud formation on chemical composition during the 1988/89 Arctic winter

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..545j&link_type=abstract

Geophysical Research Letters, Supplement (ISSN 0094-8276), vol. 17, March 1990, p. 545-548. Research supported by the Department

Physics

26

Atmospheric Chemistry, Atmospheric Circulation, Cloud Physics, Ozone Depletion, Polar Meteorology, Stratosphere, Atmospheric Composition, Meridional Flow, Northern Hemisphere, Vortices, Winter

Scientific paper

The northern winter polar vortex is more disturbed dynamically and warmer than the Antarctic equivalent, and correspondingly fewer polar stratospheric clouds (PSCs) are observed to form. However, the rapid flow of stratospheric air through slow moving synoptically forced PSC regions can result in exposure of both vortical and extra vortical air to PSCs intermittently throughout the winter months. This periodic exposure to PSCs may be sufficient to perturb the chemical composition of large volumes of nothern hemisphere air. The synoptic forcing also leads to marked meridional flow which has a profound effect on chemical composition, having major impacts on both short term ozone depletion and the longer term recovery to lower ClOx abundances. Accurate simulation of the air flow is thus essential for the reliable calculation of ozone loss in polar regions.

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