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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
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.