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The Visibility Improvement State and Tribal Association of the Southeast (VISTAS) is one of
five Regional Planning Organizations (RPOs) that consist of states, tribal governments and
federal agencies. VISTAS is charged with the management of haze, visibility and other regional
air quality issues in the southeastern US. VISTAS has embarked on a multi-phase process of
testing and evaluation of regional meteorological, emissions and air quality models that will be
used to project visibility improvements as required by the regional haze rule. The VISTAS
Phase I work effort modeled three episodes (January 2002, July 1999 and July 2001) to identify
the optimal model configuration(s) to be used for the 2002 annual modeling in Phase II. Based
on the Phase I analysis, 2002 annual emissions (SMOKE) and meteorological (MM5)
simulations were performed on a 36km grid covering the continental US and a 12 km grid
covering the southeastern US. An initial 2002 CMAQ annual simulation was then performed
and the model estimates compared against observations. This paper presents the results of the
preliminary CMAQ model performance evaluation for the initial 2002 Base Case simulation.
Model performance is presented for the southeastern US using speciated fine particulate
measurements from IMPROVE, CASTNet, SEARCH, STN and NADP networks. Initial results
indicate fairly good performance for sulfate, mostly reasonable performance for Carbon species,
and performance issues for nitrate, Soil and Coarse Matter (CM).
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CNumber:
Perspectives on Haze: Causes, Consequences, Controversies Visibility Spec Conf: 10/25/2004
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Publication Type:
Proceedings
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Publication Date:
October 2004
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