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Predictions for particle deposition to vegetative canopies

Slinn, W.G.N

Abstract A theoretical framework is presented for the analysis of particle dry deposition to vegetation. This framework is similar to the one used for the analysis of momentum in a vegetative canopy. In both cases, numerical integrations could be performed, but here approximate analytical solutions are sought. First, the case of momentum is re-examined, and it is suggested that the momentum source ( $− δp δx$ ) can be important in some cases. An approximate solution to the equation describing the air concentration of particles is then found, using similar approximations found to be reasonable for momentum. The result is illustrated for different collection efficiencies, $c d E$ , and then a specific, particle-size-dependent $E$ is proposed based on windtunnel data obtained by Chamberlain. The results suggest that dry deposition velocities for 0.1–1.0 μm particles are typically about an order-of-magnitude smaller than values currently used in many air-quality models.

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Predictions for particle deposition to vegetative canopies

Slinn, W.G.N

Abstract A theoretical framework is presented for the analysis of particle dry deposition to vegetation. This framework is similar to the one used for the analysis of momentum in a vegetative canopy. In both cases, numerical integrations could be performed, but here approximate analytical solutions are sought. First, the case of momentum is re-examined, and it is suggested that the momentum source ( $− δp δx$ ) can be important in some cases. An approximate solution to the equation describing the air concentration of particles is then found, using similar approximations found to be reasonable for momentum. The result is illustrated for different collection efficiencies, $c d E$ , and then a specific, particle-size-dependent $E$ is proposed based on windtunnel data obtained by Chamberlain. The results suggest that dry deposition velocities for 0.1–1.0 μm particles are typically about an order-of-magnitude smaller than values currently used in many air-quality models.

Predictions for particle deposition to vegetative canopies

Slinn, W.G.N

Abstract A theoretical framework is presented for the analysis of particle dry deposition to vegetation. This framework is similar to the one used for the analysis of momentum in a vegetative canopy. In both cases, numerical integrations could be performed, but here approximate analytical solutions are sought. First, the case of momentum is re-examined, and it is suggested that the momentum source ( $− δp δx$ ) can be important in some cases. An approximate solution to the equation describing the air concentration of particles is then found, using similar approximations found to be reasonable for momentum. The result is illustrated for different collection efficiencies, $c d E$ , and then a specific, particle-size-dependent $E$ is proposed based on windtunnel data obtained by Chamberlain. The results suggest that dry deposition velocities for 0.1–1.0 μm particles are typically about an order-of-magnitude smaller than values currently used in many air-quality models.

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Titel:

Predictions for particle deposition to vegetative canopies

Beteiligte:

Slinn, W.G.N (Autor:in)

Erschienen in:

Atmospheric Environment ; 16 ; 1785-1794

Erscheinungsdatum:

23.11.1981

Format / Umfang:

10 pages

ISSN:

DOI:

https://doi.org/10.1016/0004-6981(82)90271-2

Medientyp:

Aufsatz (Zeitschrift)

Format:

Elektronische Ressource

Sprache:

Englisch

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