NUMERICAL SIMULATION FOR THE EFFECTS OF PBL AND THE SURFACE ON POLLUTANT CONCENTRATIONS

Chen Panqin

doi:10.1007/BF03179757

Impact Factor: 5.8

Volume 2 Issue 2

Apr. 1985

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1985 > 2(2): 251-259

NUMERICAL SIMULATION FOR THE EFFECTS OF PBL AND THE SURFACE ON POLLUTANT CONCENTRATIONS

Chen Panqin

1.
Institute of Atmospheric Physics, Academia Sinica, Beijing

Chen Panqin

doi: 10.1007/BF03179757

Abstract
References
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Abstract:
On the basis of theoretical and experimental results of study of planetary boundary layer (PBL), the physical parameters describing the structure of PBL are calculated by using the data obtained from a meteor-ological tower and the effects of PBL and the surface on pollutant concentrations are numerically simulated with a time-dependent two-dimensional advection and diffusion equation.It is shown that the diurnal variation of PBL results in that of concentration. The height of mixing layer is an important factor to determine the ground-level concentration. As for an elevated point source, the height of mixing layer, growing from lower to higher than the releasing height is a necessary condition for the phenomenon of fumigation. It is also shown that the surface may be considered as a boundary with perfect reflection when Vd ≤ 0.001 m s-1, but has an important effect on concentration and must be carefully dealt with when Vd ≤ 0.01 m s-1.
References

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Manuscript History

Manuscript received: 10 April 1985

Manuscript revised: 10 April 1985

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 SIMULATION FOR THE EFFECTS OF PBL AND THE SURFACE ON POLLUTANT CONCENTRATIONS

Chen Panqin

1. Institute of Atmospheric Physics, Academia Sinica, Beijing

Manuscript received: 1985-04-10
Manuscript revised: 1985-04-10

Abstract: On the basis of theoretical and experimental results of study of planetary boundary layer (PBL), the physical parameters describing the structure of PBL are calculated by using the data obtained from a meteor-ological tower and the effects of PBL and the surface on pollutant concentrations are numerically simulated with a time-dependent two-dimensional advection and diffusion equation.It is shown that the diurnal variation of PBL results in that of concentration. The height of mixing layer is an important factor to determine the ground-level concentration. As for an elevated point source, the height of mixing layer, growing from lower to higher than the releasing height is a necessary condition for the phenomenon of fumigation. It is also shown that the surface may be considered as a boundary with perfect reflection when Vd ≤ 0.001 m s-1, but has an important effect on concentration and must be carefully dealt with when Vd ≤ 0.01 m s-1.