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THERMAL PROPERTIES OF SECONDARY ORGANIC AEROSOLS
Citation:
OFFENBERG, J. H., T. E. KLEINDIENST, MOHAMMAD JAOUI, M. LEWANDOWSKI, AND E. O. EDNEY. THERMAL PROPERTIES OF SECONDARY ORGANIC AEROSOLS. GEOPHYSICAL RESEARCH LETTERS. American Geophysical Union, Washington, DC, 33(3):1-4, (2006).
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:
Volume concentrations of steady-state secondary organic aerosol (SOA) were measured in several hydrocarbon/NOx irradiation experiments. These measurements were used to estimate the thermal behavior of the particles that may be formed in the atmosphere. These laboratory measurements suggest that the difference in the volume of the SOA due to a change in temperature depends upon the reactant concentrations.