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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 2, NUMBER 3, MARCH 1989

PROFESSIONAL PUBLICATIONS...
GLOBAL MODELING

Item #d89mar49

"Chemistry and Transport in a Three-Dimensional Stratospheric Model: Chlorine Species During a Simulated Stratospheric Warming," J.A. Kaye (Atmos. Chem. & Dynamics, NASA Goddard Space Flight Ctr., Greenbelt MD 20771), J. Geophys. Res., 94(D1), 1057-1083, Jan. 20, 1989.

Calculations were carried out for a 6-day major stratospheric warming period using winds derived from a spectral forecast model. Results include zonal mean fields, latitude-longitude distributions (with time changes), vertical profiles, and time series of the mixing ratios of transported constituents and of total stratospheric column amounts. Results show transport and chemistry are important for ClO, ClONO2, HCl and HOCl. Dynamical effects dominate the variability of HCl, while diurnal ones dominate ClONO2 and ClO.

Item #d89mar50

"Potential Effects of Anthropogenic Trace Gas Emissions on Atmospheric Ozone and Temperature Structure and Surface Climate," R.K.R. Vupputuri (Canadian Climate Ctr., 4950 Dufferin St., Downsview, Ontario M3H 5T4, Can.), Atmos. Environ., 22(12), 2809-2818, Dec. 1988.

Uses a coupled 1-D radiative-convective and photochemical diffusion model to assess possible effects of past historical and projected future anthropogenic emissions in two types of experiments. Found in both cases the direct and indirect effects of non-CO₂ major trace gases (N₂O, CH₄ and CFCs) contribute substantially to the calculated temperature changes due to an increase in CO₂ concentration. Also discusses the calculated changes in atmospheric O3 which contribute indirectly to the surface warming and stratospheric cooling.

Item #d89mar51

"Climate and Regional Resource Analysis: The Effect of Scale on Resource Homogeneity," R.M. Cushman (Environ. Sci. Div., Oak Ridge Nat. Lab., Oak Ridge TN 37831), M.P. Farrell, F.A. Koomanoff, Climatic Change, 13(2), 129-148, Oct. 1988.

Quantifies the change in resource heterogeneity as a function of gridcell size. Analyzes four resource variables (wheat yield, percent forest cover, population density, and percent of land irrigated) on the basis of county-averaged data. Assignment to major drainage basins is based on exact watershed boundaries. A major change in resource heterogeneity within gridcells occurs at a grid length of from 1.2° to 3° .

Item #d89mar52

"The Role of Thermal Expansion in Raising the Global Sea Level," P.F. Demchenko (Inst. Atmos. Phys., USSR Acad. Sci.), Ye. Yu. Polezhayeva, Izvestiya, Atmos. & Oceanic Phys., 700-706, April 1988 (English trans. from Russian, 23(9), 1987).

Presents estimates of the change in sea level for a specified linear surface temperature trend that were obtained from diffusive and advective-diffusive models and from observed secular changes in sea level. Calculations from the diffusive model produce satisfactory agreement with observations, but results obtained with allowance for large-scale upwelling are considerably below the observed values. Corrections for possible change in the speed of large-scale upwelling brings the predicted sea level closer to the empirical figures.