1Aeronautics and Astronautics, Stanford University, Stanford, CA, USA
2Civil and Environmental Engineering, Stanford University, Stanford, CA, USA
Received: 22 Oct 2009 – Discussion started: 18 Nov 2009
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.
Revised: 25 Feb 2010 – Accepted: 02 Mar 2010 – Published: 12 Mar 2010
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.