Abstract
An Air Quality Package of programs (AQPAC) was developed by the Atmospheric Environment Service (AES) to assist meteorologists at regional weather centres across Canada in response to accidental release of toxic chemicals into the atmosphere. The computer package of programs are written in an interactive, user friendly mode for use on the regional AES mini-computers (HP-1000). The special advantage of this package is all programs are capable of utilizing the mini-computer’s resident real-time observed weather data base of the most recent 24 hours duration from all weather stations of the North American continent. Physical processes such as plume rise, limited mixing, dry and wet deposition, chemical decay rate and ground contamination are formulated in short-range Gaussian dispersion models. The concentration of pollutants in air is estimated at receptors in three dimensional space and results are displayed both in tabular and graphical forms. Included in the package is a medium-range surface trajectory model (< 1000 km) for diagnostic and impact analysis.
Published Version
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