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Download Polyphemus 1.9 User's Guide - GForge
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124 CHAPTER 5. MODELS 5.1.6 Correction coefficients file: correction coefficients.dat The correction coefficient file is used for line sources and gaseous species only. It contains coefficients for each stability classes and land categories of Briggs parameterization. These coefficients are used to reduce the error induced by the Gaussian line source analytical formula [Briant et al., 2011]. 5.2 GaussianPlume aer It is the Gaussian plume model for aerosol species. The corresponding program is plume aer. It can be run when there are aerosol species only, or both aerosol and gaseous species. It takes the same input files as the Gaussian plume model, except that they contain in addition some sections dedicated to aerosol species. It takes in addition another input file that describes the diameters of particles (file diameter.dat already described in Section 3.9.2). The output files are binary files, one for each gaseous species and one for each couple (aerosol species, diameter). The way results are saved is described in an additional configuration file (reference: plume-saver aer.cfg) described in Section 4.9. 5.2.1 Configuration File: plume aer.cfg It is exactly the same file as the configuration file described in Section 5.1. The only data that may differ are the paths to the input files. 5.2.2 Source Description: plume-source aer.dat It is the same file as the source file for gaseous species, except that obviously some (or all) emitted species will be particulate species. The corresponding sections are named [aerosol source]. However, some lines are different for aerosols: • The species is given after the key word “Species name” instead of “Species”. • Only one species per source can be given. 5.2.3 Vertical Levels: plume-level.dat It is the same file as in Section 5.1. 5.2.4 Species: gaussian-species aer.dat The section [species] lists the gaseous species, and the section [aerosol species] lists the aerosol species. In the case of radioactive or biological decay, the sections are the same as described in Section 5.1 and contain the half-life times of both gaseous and aerosol species. 5.2.5 Diameters: diameter.dat See Section 3.9.2. 5.2.6 Meteorological data: gaussian-meteo.dat See Section 5.1.5.
