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Global Climate Change DigestArchives of the
Global Climate Change Digest

A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999

FROM VOLUME 10, NUMBER 5, MAY 1997

PROFESSIONAL PUBLICATIONS...
IMPACTS OF TROPICAL DEFORESTATION


Item #d97may12

"The Response to Deforestation and Desertification in a Model of West African Monsoons," X. Zheng (Dept. of EAPS, Rm. 54-1715, Mass. Inst. Technol., Cambridge MA 02139; e-mail: zheng@banjo.mit.edu), E.A.B. Eltahir, Geophys. Res. Lett., 24(2), 155-158, Jan. 15, 1997.

Simulations of the West African monsoons with a simple zonally-symmetric model suggest that the impact of human-induced change in land cover depends critically on the location of the change in vegetation cover. Desertification along the Sahara border has little impact, whereas deforestation along the southern coast of West Africa may result in a complete collapse of monsoon circulation and associated rainfall.


Item #d97may13

"Biogeophysical Consequences of a Tropical Deforestation Scenario: A GCM Simulation Study," Y.C. Sud (Lab. Atmos., NASA-Goddard, Greenbelt MD 20771), G.K. Walker et al., J. Clim., 9(12), 3225-3247, Dec. 1996.

A three-year simulation in which all tropical forests were replaced with grassland broadly confirms several findings of similar recent studies, but also elucidates some global-scale climatic impacts not previously identified.


Item #d97may14

"Impacts of Tropical Deforestation. Part II: The Role of Large-Scale Dynamics," H. Zhang, K. McGuffie (Dept. Appl. Phys., Univ. of Technol. Sydney, POB 123, Broadway NSW 2007, Australia; e-mail: kendal@phys.uts.edu.au), A. Henderson-Sellers, J. Clim., 9(10), 2498-2521, Oct. 1996.

Examines impacts on the large-scale climate system using experiments with the NCAR climate model. Proposes a mechanism by which disturbances arising from tropical deforestation propagate to higher latitudes.


Item #d97may15

"Tropical Deforestation and Climate Change," K.L. O'Brien (Commission for Environ. Cooperation, 393 St. Jacques St. W., S. 200, Montréal PQ H2Y 1N9, Can.), Prog. Phys. Geog., 20(3), 311-335, Sep. 1996.

Reviews the physical links between tropical rain forests and the atmosphere, and considers the results of studies of the climatic impacts of deforestation. There is a growing consensus that deforestation leads to warmer, drier climates, but the nature of the studies to date leave considerable uncertainty over local, regional and perhaps global impacts.

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