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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

PROFESSIONAL PUBLICATIONS...
STRATOSPHERIC MODELING

Item #d88jul43

"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.

Item #d88jul44

"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.

Item #d88jul45

"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, Dec. 1987.

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.