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Studies of Arctic stratospheric ozone in a 2‐D model including some effects of zonal asymmetries
Author(s) -
Isaksen I. S. A.,
Rognerud B.,
Stordal F.,
Coffey M. T.,
Mankin W. G.
Publication year - 1990
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl017i004p00557
Subject(s) - stratosphere , ozone , atmospheric sciences , polar vortex , polar , ozone layer , arctic , ozone depletion , environmental science , the arctic , trough (economics) , climatology , meteorology , geology , physics , oceanography , astronomy , economics , macroeconomics
A two‐dimensional (2‐D) 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% in column ozone at 70°N. In agreement with column measurements made from the DC‐8, the model estimates an increase in the columns of HNO 3 and ClCNO 2 , and a decrease in the HCl column within the polar vortex.