Numerical Study on Dry Deposition Processes in Canopy Layer

Lei Xiaoen; Julius S. Chang

doi:10.1007/BF02677082

Impact Factor: 5.8

Volume 9 Issue 4

Oct. 1992

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1992 > 9(4): 491-500

Numerical Study on Dry Deposition Processes in Canopy Layer

1.
Institute of Atmospheric Physics, Academia Sinica, Beijing,ASRC, Stale University of New York, Albany, N.Y. 12205, U.S.A.

doi: 10.1007/BF02677082

Abstract
References
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Abstract:
A coupling model between the canopy layer (CL) and atmospheric boundary layer (ABL) for the study of dry deposition velocity is developed. The model consists of six parts: chemical species conservation equation including absorptive factor; the species uptake action including detailed vertical variation of absorptive element in CL; momen-tum exchange in CL which is represented by a first-order closure momentum equation with an additional larger-scale diffusive term; momentum exchange in ABL which is described by a complete set of the ABL turbulent statistic parameters; absorptivity (or solubility or reflection) at the surface including effects of the physical and chemi-cal characters of the species, land type, seasonal and diurnal variations of the meteorological variables; and deposition velocity derived by distributions of the species with height in CL. Variational rules of the concentration and deposi-tion velocity with both height and time are simulated with the model for both corn and forest canopies. Results pre-dicted with the bulk deposition velocity derived in the paper consist well with experimental data.
References

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Manuscript History

Manuscript received: 10 October 1992

Manuscript revised: 10 October 1992

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Numerical Study on Dry Deposition Processes in Canopy Layer

1. Institute of Atmospheric Physics, Academia Sinica, Beijing,ASRC, Stale University of New York, Albany, N.Y. 12205, U.S.A.

Manuscript received: 1992-10-10
Manuscript revised: 1992-10-10

Abstract: A coupling model between the canopy layer (CL) and atmospheric boundary layer (ABL) for the study of dry deposition velocity is developed. The model consists of six parts: chemical species conservation equation including absorptive factor; the species uptake action including detailed vertical variation of absorptive element in CL; momen-tum exchange in CL which is represented by a first-order closure momentum equation with an additional larger-scale diffusive term; momentum exchange in ABL which is described by a complete set of the ABL turbulent statistic parameters; absorptivity (or solubility or reflection) at the surface including effects of the physical and chemi-cal characters of the species, land type, seasonal and diurnal variations of the meteorological variables; and deposition velocity derived by distributions of the species with height in CL. Variational rules of the concentration and deposi-tion velocity with both height and time are simulated with the model for both corn and forest canopies. Results pre-dicted with the bulk deposition velocity derived in the paper consist well with experimental data.