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Science 16 March 1990:
Vol. 247. no. 4948, pp. 1322 - 1325
DOI: 10.1126/science.247.4948.1322
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Articles

Amazon Deforestation and Climate Change

J. Shukla 1, C. Nobre 1, and P. Sellers 1

1 Center for Ocean-Land-Atmosphere Interactions, Department of Meteorology, University of Maryland, College Park, MD 20742

A coupled numerical model of the global atmosphere and biosphere has been used to assess the effects of Amazon deforestation on the regional and global climate. When the tropical forests in the model were replaced by degraded grass (pasture), there was a significant increase in surface temperature and a decrease in evapotranspiration and precipitation over Amazonia. In the simulation, the length of the dry season also increased; such an increase could make reestablishment of the tropical forests after massive deforestation particularly difficult.


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