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The impact of global warming on river runoffA global atmospheric model is used to calculate the annual river runoff for 33 of the world's major rivers for the present climate and for a doubled CO2 climate. The model has a horizontal resolution of 4 x 5 deg, but the runoff from each model grid box is quartered and added to the appropriate river drainage basin on a 2 x 2.5 deg resolution. The computed runoff depends on the model's precipitation, evapotranspiration, and soil moisture storage. For the doubled CO2 climate, the runoff increased for 25 of the 33 rivers, and in most cases the increases coincide with increased rainfall within the drainage basins. There were runoff increases in all rivers in high northern latitudes, with a maximum increase of 47 percent. At low latitudes there were both increases and decreases ranging from a 96 increase to a 43 percent decrease. The effect of the simplified model assumptions of land-atmosphere interactions on the results is discussed.
Document ID
19920045134
Document Type
Reprint (Version printed in journal)
Authors
Miller, James R. (Rutgers University New Brunswick, NJ, United States)
Russell, Gary L. (NASA Goddard Institute for Space Studies New York, United States)
Date Acquired
August 15, 2013
Publication Date
February 28, 1992
Publication Information
Publication: Journal of Geophysical Research
Volume: 97
Issue: D3, F
ISSN: 0148-0227
Subject Category
EARTH RESOURCES AND REMOTE SENSING
Distribution Limits
Public
Copyright
Other

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