Document Detail

Climatology (communication arising): rural land-use change and climate.
MedLine Citation:
PMID:  14724627     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Kalnay and Cai 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.
Kevin E Trenberth
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Publication Detail:
Type:  Comment; Journal Article    
Journal Detail:
Title:  Nature     Volume:  427     ISSN:  1476-4687     ISO Abbreviation:  Nature     Publication Date:  2004 Jan 
Date Detail:
Created Date:  2004-01-15     Completed Date:  2004-02-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0410462     Medline TA:  Nature     Country:  England    
Other Details:
Languages:  eng     Pagination:  213; discussion 214     Citation Subset:  -    
National Center for Atmospheric Research, PO Box 3000, Boulder, Colorado 80307, USA.
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Comment On:
Nature. 2003 May 29;423(6939):528-31   [PMID:  12774119 ]

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