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Low-tech cool: Shade trees for subtropical streets
Date:4/21/2010

re reduction attributable to shade trees or bamboo.

Twelve species in the study provided 0.64 to 2.52C lower air temperature and 3.28 to 8.07C lower surface-soil temperature under the canopies compared with the unshaded open site. When analyzed for "cooling effect", Chinese elm (Ulmus parvifolia) and Rose wood (Pterocarpus indicus) were the determined to be the most effective, while Golden shower tree (Cassia fitula), Autumn maple (Bischofia javanica), and Swollen bamboo (Bambusa ventricosa) were the least effective. "The shading of U. parvifolia reduced air temperature by 2.52C but that of C. fitula only by 0.64C; the difference was almost fourfold", noted the authors.

"This research could help maximize the cooling effect of shade trees by careful selection of species based on their canopy and leaf characteristics", the authors said. They added that although the field studies were carried out in a park, the results can be applied to shade trees in other subtropical urban environments.


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Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert

Page: 1 2

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