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DEVELOPMENT AND EVALUATION OF AN IMPROVED SOA REPRESENTATION IN THE CMAQ MODEL
Citation:
OFFENBERG, J. H., E. O. EDNEY, TAD KLEINDIENST, M. LEWANDOWSKI, M. JAOUI, P. BHAVE, CHRIS 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.
Impact/Purpose:
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.
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.