Turbulent Schmidt Numbers Above a Wheat Crop |
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Authors: | J D Wilson |
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Institution: | 1. Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, T6G 2E3, Canada
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Abstract: | Measurements of vertical fluxes and concentration differences above a spring wheat crop (height $h=0.9$ – $0.95$ m, row spacing 0.25 m, displacement height $d=0.5$ – $0.6$ m) were analyzed to determine the Schmidt numbers for water vapour ( $S^\mathrm{v}$ ) and carbon dioxide ( $S^\mathrm{c}$ ) based on concentration differences between intakes 2.55 and 3.54 m above the ground. During nearly-neutral stratification $S^\mathrm{v}(0) = 0.68 \pm 0.1$ while $S^\mathrm{c} = 0.78 \pm 0.2$ , implying that the roughness sublayer extended above $2.5 h$ . |
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