Techreport,

User's guide for the Photochemical Box Model (PBM)

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Environmental Sciences Research Lab., Research Triangle Park, NC., (November 1984)

Abstract

The user's guide for the photochemical box model (PBM) describes the structure and operation of the model and its preprocessors and provides the potential user with guidance in setting up input data. The PBM is a simple stationary single-cell model with a variable height lid designed to provide volume-integrated hour averages of O3 and other photochemical smog pollutants of interest for an urban area for a single day of simulation. The PBM is most appropriate for application in air stagnation conditions with light and variable winds. The PBM assumes that emission sources are homogeneously distributed across the surface face of the box volume and that the volume is well mixed at all times. The user must provide the PBM with initial species concentrations, hourly inputs of wind speed, source emission fluxes of CO, NC(x), THC, and hydrocarbon reactivity classes, and boundary species concentrations. Values of measured solar radiation and mixed layer depth may be specified at subhourly intervals throughout a simulation.

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