Correlations between Ozone and Secondary Organic Aerosol observed in Urban Locations
Abstract
Observations in Mexico City during the MILAGRO 2006 campaign and in Houston during the TexAQS 2000 campaign have shown correlations between Ox (Ox = O3 + NO2) and the oxidized component of organic aerosol (OOA), which is interpreted as secondary organic aerosol (SOA). Such a correlation is expected given that ozone production and SOA formation are both fundamentally related to the oxidation of VOCs. We quantitatively investigate the observed correlation between OOA and Ox by comparison with the calculated ratio of the production rates of SOA and ozone. P(SOA)/P(Ox) is calculated using measurements of ambient VOCs, predicted concentrations of unmeasured compounds from vehicle exhaust, and known atmospheric oxidation mechanisms
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2007
- Bibcode:
- 2007AGUFM.A21G..02W
- Keywords:
-
- 0305 Aerosols and particles (0345;
- 4801;
- 4906);
- 0345 Pollution: urban and regional (0305;
- 0478;
- 4251);
- 0365 Troposphere: composition and chemistry