The Maryland Department of Natural Resources Power Plant Research Program (PPRP) has used
the CALMET/CALPUFF modeling system to estimate nitrogen deposition in the Chesapeake
Bay watershed. Comprehensive NOx emissions inventories and meteorological data bases were
developed to conduct the modeling. Previous studies have reported on the methodology
employed, and on the evaluation of model performance at 38 monitoring stations located in or
near the Chesapeake Bay watershed, including NADP/NTN, CASTNET, and AIRS sites. These
evaluations have examined the model’s ability to predict concentrations of nitric acid, particulate
nitrate, and NOx in addition to wet nitrate deposition. The present paper provides a summary of
this previous work and outlines some additional applications of the CALMET/CALPUFF
modeling system, applied on a regional scale, that are being investigated by PPRP. These
additional applications are “works in progress” and highlight the versatility of this Lagrangian
modeling system and its ability to investigate and provide useful insights into air quality issues of
a regional nature as well as providing estimates of the impacts of nitrogen species formed from
utility and other anthropogenic sources of NOx on the environment in Maryland.
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CNumber:
Guideline on Air Quality Models: A New Beginning: 04/04/2001
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Publication Type:
Proceedings
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Publication Date:
April 2001
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