EPA Science Inventory

DEVELOPMENT AND EVALUATION OF AN IMPROVED SOA REPRESENTATION IN THE CMAQ MODEL

Citation:

OFFENBERG, J. H., E. O. EDNEY, T. KLEINDIENST, M. LEWANDOWSKI, M. JAOUI, P. BHAVE, C. NOLTE, AND G. SARWAR. DEVELOPMENT AND EVALUATION OF AN IMPROVED SOA REPRESENTATION IN THE CMAQ MODEL. Presented at 4th Annual CMAS Models-3 User's Conference, Chapel Hill, NC, September 26 - 28, 2005.

Description:

This poster outlines ongoing laboratory and field work being performed to a) identify the major SOA precursors b) identify tracer compounds for the major SOA precursors and c) determine reaction mechanisms for SOA formation. The goal of this work is to incorporate newly-developed SOA formation mechanisms into the CMAQ model and to evaluate SOA chemistry models in CMAQ by comparing measured SOA concentrations with model predictions.

Purpose/Objective:

1. Conduct laboratory studies with scientists from Caltech, the University of Antwerp, and the NOAA Aeronomy Laboratory to improve treatments of SOA Chemistry and N2O5 chemistry in CMAQ.

2. Analyze ambient PM2.5 samples in Research Triangle Park, NC, Detroit, MI and Pasadena, CA and when available compare field data with CMAQ predictions obtained from AMD.

3. In 2005 recommend improvements to AMD for the treatment of SOA chemistry in CMAQ.

4. By the end of FY06, deliver an improved SOA chemistry model to AMD who will incorporate the model into CMAQ.

5. By the end of 2007, deliver an improved N2O5 chemistry model to AMD who will incorporate the model into CMAQ.

URLs/Downloads:

Record Details:

Record Type: DOCUMENT (PRESENTATION/POSTER)
Start Date: 09/27/2005
Completion Date: 09/27/2005
Record Last Revised: 06/21/2006
Record Created: 10/11/2005
Record Released: 10/11/2005
Record ID: 141064

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL EXPOSURE RESEARCH LAB

HUMAN EXPOSURE AND ATMOSPHERIC SCIENCES DIVISION

PROCESS MODELING RESEARCH BRANCH