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"Sun Leaves" and "Shade Leaves": Differences in Convective Heat Dissipation

Steven Vogel
Ecology
Vol. 49, No. 6 (Nov., 1968), pp. 1203-1204
DOI: 10.2307/1934517
Stable URL: http://www.jstor.org/stable/1934517
Page Count: 2
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Abstract

Temperatures of radiantly heated sun and shade leaves of white oak (Quercus alba L.) were measured in a low-speed wind tunnel. In either still air or a gentle updraft the difference between ambient and leaf temperature is about 20% less for the sum leaves than for the shade leaves. Consequently the former are more effective heat dissipaters.

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