Turbulent dispersion in the atmospheric surface layer |
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| Authors: | J D Wilson |
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| Institution: | (1) Atmospheric Environment Service, 4905 Dufferin St., Downsview, Ontario, Canada;(2) New Zealand Meteorological Service, P.O. Box 722, Wellington, New Zealand |
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| Abstract: | By non-dimensionalizing a trajectory-simulation (TS) model of turbulent dispersion, it is shown that the dimensionless concentration z
0cu*/kQ (cu
*/kQ) due to a continuous line (area) source of strength Q in the atmospheric surface layer depends only on z/z
0, x/z
0, z
0/L and z
s/z0, where z
s is the source height. The TS model is used to tabulate concentration profiles due to ground-level line and area sources. Concentration profiles generated by the TS model for elevated sources are shown to be inconsistent with the Reciprocal Theorems of Smith (1957) and it is suggested that this is because the flux-mean gradient closure scheme inherent in the Reciprocal Theorem is invalid for an elevated source. |
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| Keywords: | |
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