Airshed management system for the Alberta oil sands: Volume II: Meteorological data

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  • A climatological air quality dispersion was developed which provides more powerful analyses capabilities than are avaiIable in traditional COM-type models. The model incorporates a time series approach to satisfy identified user needs. The three components of the model are: the time series file of meteorological variables, the program (GLCGEN) used to generate ground IeveI concentrations, and the frequency analysis program (FRQDTN) which defines the analyses for a particular run. The time series file contains the meteorological data necessary to define dispersion cIasses and aIso incIudes other meteoroIogicaI parameters which can be used to further cIassify the ground IeveI concentrations anaIyzed in the frequency distribution program. Program GLCGEN incorporates the disperision formulations and computes ground level concentrations for each receptor source pair for each dispersion class uti izing user-defined source characteristics and an emission rate of unity. This array of ground IeveI concentration vaIues is stored on a random access file for access by FRQOTN. This precalculation of procedure permits cons derabIe saving of computer costs when Iong time series of data are processed.

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