Citation:

REFF, A. AND P. BHAVE. EMISSIONS INVENTORY OF PM _2.5 TRACE ELEMENTS ACROSS THE U.S. Presented at American Association for Aerosol Research 2006, St. Paul, MN, September 10 - 15, 2006.

Impact/Purpose:

The objectives of this task are to continue development and improvement of EPA's mesoscale (regional through urban scale) air quality modeling systems, such as the Community Multiscale Air Quality (CMAQ) model, as air quality management and NAAQS implementation tools. This task focuses on needed research and development of air quality models targeted for a major CMAQ model release in FY08. Model development for a broad scope of application is envisioned. For example, CMAQ will need to be able to simulate air quality feedbacks to meteorology and climate as well as intercontinental transport. The 2008 release of CMAQ is timed to coincide with EPA/OAR's and the states' needs for an improved model for assessments of progress (mid-course corrections) in the post-SIP submittal timeframe.

Description:

This abstract describes work done to speciate PM_2.5 emissions into emissions of trace metals to enable concentrations of metal species to be predicted by air quality models. Methods are described and initial results are presented. A technique for validating the resulting PM_2.5 metals emissions by comparing them to ambient concentrations is described, and the need for future improvement of the speciation process is discussed.

Record Details: