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SPECIATE - EPA'S DATABASE OF SPECIATED EMISSION PROFILES
Citation:
HOUYOUX, M., D. BECK, AND D. MOBLEY. SPECIATE - EPA'S DATABASE OF SPECIATED EMISSION PROFILES. Presented at AWMA Webcast , Research Triangle Park, NC, February 22, 2007.
Impact/Purpose:
The objective of this task is to improve the ability to model emissions from selected environmentally-dependent sources, test the performance of the models, incorporate them into a larger emission-modeling framework, and evaluate the effect of the emission models in support of improving the performance of CMAQ at all spatial and temporal scales. Evaluation will be with respect to previous CMAQ modeling results and ambient concentration data. In addition, the task will provide ADP and GIS contractor support for the generation and application of emission data in support of CMAQ development and evaluation as well as emission research.
Description:
SPECIATE is the U.S. Environmental Protection Agency's (EPA) repository of total organic compound (TOC) and particulate matter (PM) speciation profiles for emissions from air pollution sources. The data base has recently been updated and an associated report has recently been released. Among the many uses of speciation data, these source profiles are used to: 1) create speciated emissions inventories for regional haze, particulate matter with an aerodynamic diameter less than 2.5 micrometers (PM2.5), and ozone (O3) air quality modeling; 2) estimate hazardous and toxic air pollutant emissions from total PM and TOC primary emissions; 3) provide input to chemical mass balance (CMB) receptor models; and, 4) verify profiles derived from ambient measurements using multivariate receptor models (e.g., factor analysis and positive matrix factorization). To date, the initiative to update SPECIATE has produced: 2,865 PM profiles (1,504 legacy profiles, plus 1,361 new profiles of which 95 are simplified profiles); 1,215 gas profiles, 648 of which are new profiles; a total of 1,902 unique species; composite profiles for 58 (47 PM and 11 VOC) source categories; an updated SCC-to-Profile cross-reference table accounting for over 80% of national VOC and nationwide PM emissions in the draft 2002 National Emissions Inventory (NEI); VOC-to-TOG conversion factors for applicable gas profiles; a protocol for expansion of the database; a mapping of the new VOC compounds into model species categories; and review and prioritization of 49 studies entailing 614 PM and 822 VOC profiles for potential future inclusion in the SPECIATE database. Find out the latest information available on emission profiles during the Air & Waste Management Association's Audio + Web Conference on February 22, 2007 at 2:00 ET when experts discuss the latest update to the SPECIATE data base.