Air quality modeling

Guideline on Air Quality Models, OAQPS Guideline Series,U. i. Environmental Protection Agency, Research Triangle Park, N.C., 1980. 

Fig. 3. Schematic diagram of a deterministic air quality model, showing the model components and interactions (1) where each of the boxes involves a large...

Bowne, N. E., Validation and performance criteria for air quality models, in "Conference Papers, Second Joint Conference on Applications of Air Pollution Meteorology." American Meteorological Society, Boston, 1980, pp. 614-626. 

FDM FDM (Fugitive Dust Model) is an air quality model designed for computing concentration and deposition impacts from fugitive dust sources. Click the following filenames to download the file ... 

Models are available, individually, from tlie National Teclinical Information Service (NTIS) on microcomputer disks. Regulatory and Air Quality models will also be available as a package. Most of the disks must be transported (uploaded) to IBM 3090 niacliines however, some models do have PC executable code. 

Odier air quality models from ORD are also listed below. 

CTDMPLUS is a refined air quality model for use in all stability conditions for complex terrain applicadons. 

Several air quality Hg intensive sites exist and could be used as templates to determine what additional air quality measurements should be included in evaluating the performance of air quality models. These include the USEPA SuperSite programs (http //www.epa.gov/ttn/amtic/supersites.html) and the Southeastern Aerosol Research and Characterization (SEARCH) project (http //www.atmospheric-research.com/ studies/SEARCH/index. html). 

Vijayaraghavan K, Snell HE, Seigneur C (2008) Practical aspects of using satellite data in air quality modeling. Environ Sci Technol 42(22) 8187-8192... 

The expression for the concentration of an emitted species is often referred to as an air quality model. Such an expression, or model, enables... 

Myrup, L. O., and Ranzieri, A. J. (1976). A Consistent Scheme for Estimating Diffusivities to be Used in Air Quality Models, Rep. CA-DOT-TL-7169-3-76-32. California Department of Transportation, Sacramento. 

An air quality model is a method of relating air quality to emission under specific environmental conditions. There are many types of air quality models, and the purposes of this chapter are to describe models that are available for the analysis of photochemical oxidants and to give some information on how well the models perform. 

This section examines various purposes of developing and using air quality models. 

A broader regulatory application of air quality modeling is the examination of regional plans for abatement of air pollution. Ideally, each plan should be tested by a reliable model that will tell what the pollutant concentrations will be in the future if emission is reduced as specified by the plan. Therefore, alternative approaches must be evaluated both with respect to their effectiveness in cleaning the air and with respect to their social costs, and cost models and possibly even damage models must be used concurrently with the air quality model. Only in this way can a least-cost abatement strategy be implemented. 

There are many ways of categorizing air quality models. One differentiation is between statistical and deterministic models. The structure of statistical models is based on the patterns that appear in the extensive measured data. The structure of deterministic models is based on mechanistic principles wherever possible. Most deterministic models contain some degree of empiricism. For example, few models, if any, use turbulent-diffiision formulations that are based on first principles, but rather use measured values of dispersion. The same is true in regard... 

A quantitative expression for the introduction of primary pollutants into the atmosphere is basic to any air quality model. Emission is most generally described as a geographic, temporal, and chemical distribution that requires a rather massive array of numbers. Some simple models need only the aggregated numbers found in ordinary tabulations... 

Gathering emission data and putting them in condition for use in air quality models are often among the most tedious and time-consuming parts of their handling. For this reason, the preprocessing module is identified as a separate automatic operation in procedures outlined in Figure 5-1. 

TABLE 5-7 Statistical Analyses of Photochemical Air Quality Model Performance for the Los Angeles Basin ... 

Trijonis, J. C. Economic air pollution control model for Los Angeles County in 1975. General least cost-air quality model. Environ. Sci. Technol. 8 811-826, 1974. 

The literature contains reviews of air quality modeling that stress special purposes. Some concentrate on meteorologic aspects, and others combine this with air chemistry. Proceedings of several conferences are another information resource. Recent surveys have been addressed specifically to photochemical modeling problems. It may be concluded that, although they are relatively complex, the photochemical-diffusion models perform as well as, if not better than, available inert-species models. 

A variety of goals and objectives may be met with air quality modeling ... 

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