Parameterization of subgrid plume dilution for use in large-scale atmospheric simulations

A new model of plume dynamics has been developed for use as a subgrid model of plume dilution in a large-scale atmospheric simulation. The model uses mean wind, shear, and diffusion parameters derived from the local large-scale variables to advance the plume cross-sectional shape and area in time. C...

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Bibliographic Details
Published in:Atmospheric chemistry and physics 2010-03, Vol.10 (5), p.2551-2560
Main Authors: Naiman, A. D., Lele, S. K., Wilkerson, J. T., Jacobson, M. Z.
Format: Article
Language:English
Subjects:
Marine
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Summary:A new model of plume dynamics has been developed for use as a subgrid model of plume dilution in a large-scale atmospheric simulation. The model uses mean wind, shear, and diffusion parameters derived from the local large-scale variables to advance the plume cross-sectional shape and area in time. Comparisons with a large eddy simulation of aircraft emission plume dynamics, with an analytical solution to the dynamics of a sheared Gaussian plume, and with measurements of aircraft exhaust plume dilution at cruise altitude show good agreement with these previous studies. We argue that the model also provides a reasonable approximation of line-shaped contrail dilution and give an example of how it can be applied in a global climate model.
ISSN:1680-7324
1680-7316
1680-7324
DOI:10.5194/acp-10-2551-2010