Studies of Arctic stratospheric ozone in a 2-D model including some effects of zonal asymmetries

Details Studies of Arctic stratospheric ozone in a 2-D model including some effects of zonal asymmetries Studies of Arctic stratospheric ozone in a 2-D model including some effects of zonal asymmetries

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..557i&link_type=abstract

Geophysical Research Letters, Supplement (ISSN 0094-8276), vol. 17, March 1990, p. 557-560. Research supported by the Department

Physics

29

Arctic Regions, Ozone Depletion, Ozonometry, Stratosphere, Two Dimensional Models, Atmospheric Chemistry, Atmospheric Composition, Transport Theory, Zonal Flow (Meteorology)

Scientific paper

A two-dimensional zonally averaged chemistry-transport model of the stratosphere has been extended to include some zonally asymmetric effects to study the chemically disturbed conditions in the Arctic winter during the occurrence of polar stratospheric clouds (PSCs). The model allows air parcels that have been in PSCs in the polar night to be exposed to sunlight during the passage south through a wave trough. Large enhancements of ClO are estimated as well as significant ozone reductions, most pronounced around the 20 km height level. The ozone depletions maximize in late March, about one month after the cease in PSC activity in the model, and amount to 5-8 percent in column ozone at 70 deg N. In agreement with column measurements made from the DC-8, the model estimates an increase in the columns of HNO3 and ClONO2, and a decrease in the HCl column within the polar vortex.

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