Preliminary analysis of the data from this study indicate that a significant amount of ON can be classified as secondary in nature. Furthermore, data collected immediately after the grass cutting episodes shows no significant deviation from background aerosol with regards to the NO_3~- or NH_4~+. The strong correlation between NO_3~- and total organics coupled with the high degree of oxidation indicate the most likely source of NO_3~- in the aerosol is from secondary processing. Measured NH_4~+ concentrations show a high degree of correlation with SO_4~(2-), indicate the majority of ammonium and sulfate are bound together in the aerosol as ammonium sulfate.
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