February 28, 2007
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Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 1, NUMBER 1, JULY 1988
"Stratospheric Response to Trace Gas Perturbations: Changes in Ozone
and Temperature Distributions," G. Brasseur (Belg. Inst. Space Aeronomy,
1180 Brussels, Belg.), M.H. Hitchman, Science, 240(4852),
634-637, Apr. 29, 1988.
Effects of increases in CFCs and CO2 were studied using a two-dimensional
model that includes interactive radiation, wave and mean flow dynamics, and 40
trace species. Increases in CFCs and CO2 each caused opposing changes in
vertical mean O3 with a CO2-induced poleward increase reducing the CFC-induced
poleward decrease. Poleward and downward ozone transport played a major role in
determining the latitudinal variation in column ozone changes.
"Body Force Circulation and the Antarctic Ozone Minimum," T.J.
Dunkerton (Northwest Res. Assoc. Inc., POB 3027, Bellevue, WA 98009), J.
Atmos. Sci., 45(3), 427-438, Feb. 1, 1988.
The decelerating effect of enhanced upper tropospheric wavedriving in winter
and early spring induces a reverse component of the residual mean meridional
circulation in the polar lower stratosphere opposite to that induced by
radiative cooling. With sufficient upper-tropospheric wavedriving and reduced
lower stratospheric wavedriving, the mean circulation will include upwelling in
the polar lower stratosphere. Discusses analytic and numerically derived
properties of this generalized residual mean body force circulation.
"A Numerical Model for One-Dimensional Simulation of Stratospheric
Chemistry," G.S. Henderson (Dept. Earth Sci., York Univ., N. York, Ont. M3J
1P3, Can.), J.C. McConnell et al., Atmos.-Ocean, 25(4), 427-459,
The one-dimensional model incorporates most chemical species presently found
in the upper atmosphere. Calculations confirm earlier results that O3 depletions
in the 20-25 km region (O3 maximum) are very sensitive to relative abundances of
Clx and NOy in the lower stratosphere, which probably explains differences among
previously published one-dimensional model results. Explores various scenarios
of CFC emissions; present methyl chloroform emissions could have a significant
effect on total O3.
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