A numerical model of the transport and diffusion of Peronospora tabacina spores in the evolving atmospheric boundary layer

被引：13

作者：

Yao, CG ^{[1
]}

Arya, SP ^{[1
]}

Davis, J ^{[1
]}

Main, CE ^{[1
]}

机构：

[1] N CAROLINA STATE UNIV,RALEIGH,NC 27695

来源：

ATMOSPHERIC ENVIRONMENT | 1997年 / 31卷 / 11期

关键词：

dispersion model; P-tabacina spore; transport; diffusion; concentration; deposition; convective boundary layer;

D O I：

10.1016/S1352-2310(96)00181-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Numerical solutions of the diffusion equation of Peronospora tabacina spores from a finite-area source over flat terrain in the evolving convective boundary layer are presented. Temporal variations in the release of spores, atmospheric stability, wind speed, and eddy diffusivity are considered. The model also includes the vertical variations of wind and eddy diffusivity. The model results indicate that ground level concentrations decrease with time as wind speed and eddy diffusivity increase in the evolving convective boundary layer. The loss of P. tabacina spores due to deposition at the surface also decrease with increasing instability and wind speed. Deposition is found to be particularly important close to the source area. (C) 1997 Published by Elsevier Science Ltd.

引用

页码：1709 / 1714

页数：6

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