Regional and intercontinental modelling - Air Pollution Modeling and Its Application - page 134

mobile sources, non-road sources, area (non-point, non-mobile), initial/boundary
conditions (IC/BCs), and all other sources (including natural emissions and offshore
sources. Figure 2 d isplays the contribution to annual average PM 2.5 concentrations
for Pittsburgh, PA and Houston, TX for the projection-year 2010.
Examples of other applications for PPTM include: quantifying the contribution
of emissions from other source sectors or geographical regions; tracking the fate
of emissions from specific facilities to estimate their range of influence and con-
tribution to PM 2.5 concentrations, and quantifying the contribution of emissions
from selected sources or source categories to atmospheric deposition (e.g., mercury)
or visibility impairment.
Acknowledgments Tom Braverman and Kirk Baker of the U.S. PA, Office of Air Quality
Planning and Standards (OAQPS) are gratefully acknowledged for theEir upport of this work.