Rural land-use change and climate

Kevin E. Trenberth ()
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Kevin E. Trenberth: National Center for Atmospheric Research

Nature, 2004, vol. 427, issue 6971, 213-213

Abstract: Abstract Kalnay and Cai1 claim that urbanization and land-use change have a major effect on the climate in the United States. They used surface temperatures obtained from NCEP/NCAR 50-year reanalyses (NNR) and their difference compared with observed station surface temperatures as the basis for their conclusions, on the grounds that the NNR did not include these anthropogenic effects. However, we note that the NNR also overlooked other factors, such as known changes in clouds and in surface moisture, which are more likely to explain Kalnay and Cai's findings. Although urban heat-island effects are real in cities, direct estimates of the effects of rural land-use change indicate a cooling rather than a warming influence that is due to a greater reflection of sunlight.

Date: 2004
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DOI: 10.1038/427213a

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