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DETAILED ANALYSIS OF SOA ORIGINATING FROM THE PHOTOOXIDATION OF D-LIMONENE IN THE PRESENCE OF NO X AND UV LIGHT AND ITS IMPLICATION TO AMBIENT PM 2.5
Citation:
JAOUI, MOHAMMAD, T. E. KLEINDIENST, M. LEWANDOWSKI, J. H. OFFENBERG, AND E. O. EDNEY. DETAILED ANALYSIS OF SOA ORIGINATING FROM THE PHOTOOXIDATION OF D-LIMONENE IN THE PRESENCE OF NO X AND UV LIGHT AND ITS IMPLICATION TO AMBIENT PM 2.5. Presented at 24th Annual Conference of the American Association for Aerosol Research, Austin, TX, October 17 - 21, 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:
A detailed analysis was carried out of the aerosol phase originated from the photooxidation of d-limonene in the presence of NOx and artificial light with the analytical emphasis on the identification of oxygenated organic compounds. The major components included six tracer compounds including 3-isopropyl pentanedioic acid, 3-acetyl pentanedioic acid, 3-carboxy heptanedioic acid, C3-C6 linear diacids, ketolimonaldehyde, limonic acid, limononic acid. Two of the compounds were found to be tracers for d-limonene photooxidation in ambient filter samples.