EPA Science Inventory

Examining the Impact of an Updated Toluene Mechanism on Air Quality in the Eastern US

Citation:

SARWAR, G., W. APPEL, R. MATHUR, AND K. L. SCHERE. Examining the Impact of an Updated Toluene Mechanism on Air Quality in the Eastern US. Chapter 38, Douw G. Steyn & Silvia Trini Castelli (ed.), Air Pollution Modeling and its Application, XXI . Springer, New York, NY, Series C:227-231, (2011).

Description:

Model simulations were performed using the CB05 chemical mechanism containing the base and an updated toluene mechanisms for the eastern US. The updated toluene mechanism increased monthly mean 8-hr ozone by 1.0-2.0 ppbv in urban areas of Chicago, the northeast US, Detroit, Cleveland, and Cincinnati compared to those with the base toluene chemistry. The updated chemistry reduced mean bias and root mean square error in ozone predictions when compared with observations greater than 85 ppbv and increased mean secondary organic aerosol from toluene by a maximum of 4%.

Purpose/Objective:

The National Exposure Research Laboratory′s (NERL′s) Atmospheric Modeling and Analysis Division (AMAD) conducts research in support of EPA′s mission to protect human health and the environment. AMAD′s research program is engaged in developing and evaluating predictive atmospheric models on all spatial and temporal scales for forecasting the Nation′s air quality and for assessing changes in air quality and air pollutant exposures, as affected by changes in ecosystem management and regulatory decisions. AMAD is responsible for providing a sound scientific and technical basis for regulatory policies based on air quality models to improve ambient air quality. The models developed by AMAD are being used by EPA, NOAA, and the air pollution community in understanding and forecasting not only the magnitude of the air pollution problem, but also in developing emission control policies and regulations for air quality improvements.

URLs/Downloads:

Examining the Impact of an Updated Toluene Mechanism on Air Quality in the Eastern US   (PDF,NA pp, 766 KB,  about PDF)

Record Details:

Record Type: DOCUMENT (BOOK CHAPTER)
Start Date: 10/08/2011
Completion Date: 10/08/2011
Record Last Revised: 01/17/2012
Record Created: 10/07/2010
Record Released: 10/07/2010
OMB Category: Other
Record ID: 230464

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL EXPOSURE RESEARCH LAB

ATMOSPHERIC MODELING AND ANALYSIS DIVISION

ATMOSPHERIC MODEL DEVELOPMENT BRANCH