Identify and load your modeling data into BenMAP using theBase Year Model File box. If
temporal scaling is used, load your modeling forecasts using theFuture Year Model File box.
The base year file should be created with modeling data which closely reflects the historical
conditions of the monitor data to be used. Typically multiple future year files will be used to
create multiple air quality grids for use in an analysis. That is, one future year file might represent
a future projection of current trends, while another might represent the results of implementing a
Spatial scaling involves only aBase Year Model File, and scales the concentrations of each
neighboring monitor by the ratio of the modeled concentration at the grid cell to the modeled
concentration at the grid cell containing the monitor. This approach takes into account what the
air quality modeling reveals about spatial heterogeneity in pollution levels. For example, if the
monitors are in relatively polluted urban areas, and the grid cell is in a relatively unpolluted rural
area, then the scaling will result in multiplying the monitor values with ratios less than one, and thus
produce lower values at the rural grid cell than would be estimated with interpolation of the
unscaled monitor data.
Spatial scaling, then, is useful because, while monitors provide invaluable information about
historical conditions, there are only a limited number of monitors. Many areas, particularly rural
areas, do not have close monitors. Model data can provide additional information that improves
the interpolated concentration estimates, and provides a more accurate picture of air quality.
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castellano: DIS CUS DES RAD english: DIS CUS DES RAD
português: DIS CUS DES RAD italiano: DIS CUS DES RAD
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