Atmos. Chem. Phys., 10, 2551-2560, 2010
www.atmos-chem-phys.net/10/2551/2010/
doi:10.5194/acp-10-2551-2010
© Author(s) 2010. This work is distributed
under the Creative Commons Attribution 3.0 License.
Parameterization of subgrid plume dilution for use in large-scale atmospheric simulations
A. D. Naiman1, S. K. Lele1, J. T. Wilkerson2, and M. Z. Jacobson2
1Aeronautics and Astronautics, Stanford University, Stanford, CA, USA
2Civil and Environmental Engineering, Stanford University, Stanford, CA, USA

Abstract. 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.

Citation: Naiman, A. D., Lele, S. K., Wilkerson, J. T., and Jacobson, M. Z.: Parameterization of subgrid plume dilution for use in large-scale atmospheric simulations, Atmos. Chem. Phys., 10, 2551-2560, doi:10.5194/acp-10-2551-2010, 2010.
 
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