February 28, 2007
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A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 10, NUMBER 1, JANUARY 1997
OZONE DEPLETION: CHEMISTRY & PHYSICS
"The Effect of
Small-Scale Inhomogeneities on Ozone Depletion in the Arctic," S. Edouard (Lab.
Métérol. Dynamique du CNRS, Ecole Normale Supérieure, 24 Rue Lhomond, 75231 Paris Cedex
05, France), B. Legras et al., Nature, 384(6608), 444-447, Dec. 5, 1996.
The effect of small-scale stirring and mixing of the chemical species involved in ozone
destruction can be misrepresented in chemical-transport models of the stratosphere because
of their coarse spatial resolution. This study uses a very high-resolution model (with
simplified chemistry) to show that depletion in the Arctic is sensitive to small-scale
inhomogeneities. For the conditions of the winter of 1994-95 the effect is large enough to
account for the observed discrepancies of about 40% between conventionally modeled and
observed ozone depletion.
Two items in J.
Geophys. Res., 101(D17), Oct. 20, 1996.
"Polar Ozone Depletion: A Three-Dimensional Chemical Modeling Study of Its
Long-Term Global Impact," R.S. Eckman (NASA-Langley Res. Ctr., Hampton VA 23681;
firstname.lastname@example.org), W.L. Grose et al., 22,977-22,989. Used a 3-D chemistry
transport modelto examine the export of ozone-poor air from the south polar region
following the breakup of that polar vortex, . Ozone is transported towards the equator to
about 20° S latitude by the first southern summer following the breakup. Results show a
potential exists for the long-term accumulation of ozone loss in the southern polar
region, and a gradual increase in the global impact of polar ozone depletion.
"Role of Aerosol Variations in Anthropogenic Ozone Depletion in the Polar
Regions," R.W. Portmann (Aeron. Lab., NOAA, 325 Broadway, Boulder CO 80303), S.
Solomon et al., 22,991-23,006. A climatology of aerosol surface area inferred from
satellite measurements is used as input to a 2-D model. Finds that volcanic aerosol inputs
are likely to modulate the severity of the Antarctic ozone hole. Of other factors
investigated, temperature and aerosol amount were found to have the strongest control on
the modeled ozone loss, for a given chlorine loading. Implications for the Arctic are
Between Ozone Loss and Volcanic Aerosol at Altitudes Below 14 km over McMurdo Station,
Antarctica," T. Deshler (Dept. Atmos. Sci., Univ. Wyoming, Laramie WY 82071), B.J.
Johnson et al., Geophys. Res. Lett., 23(21), 2931-2934, 1996.
Ozone and aerosol profiles have been measured in the austral spring for the years
1986-1995, spanning the development and decay of the recent perturbation to stratospheric
aerosol caused by the Pinatubo eruption. The volcanic aerosol signal persisted over
Antarctica for three austral springs, implying an exponential decay rate of about 14
Antarctic Ozone Hole," D.J. Hofmann (CMDL/NOAA, 325 Broadway, Boulder CO 80303;
e-mail: email@example.com), Nature, 383(6596), 129, Sep. 12, 1996.
Predicts a deeper ozone hole for 1996 because of the effects of the quasi-biennial
oscillation in stratospheric winds. (See Global Climate Change Digest, News, Dec.
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