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

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...

Full description

Saved in:
Bibliographic Details
Published in:Atmospheric environment (1994) 1997-06, Vol.31 (11), p.1709-1714
Main Authors: Yao, Chengwei, Pal Arya, S., Davis, Jerry, Main, Charles E.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Fungal plant pathogens
Phytopathology. Animal pests. Plant and forest protection
Systematics. Morphology. Development cycle. Physiology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1352-2310
1873-2844
DOI:10.1016/S1352-2310(96)00181-1