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(555) Annual and Diurnal Concentrations of Organic PM2.5 at PM Supersites: Pittsburgh and Baltimore.
Rogge, Wolfgang*,1, Bernardo-Bricker, Anna1, Sevimoglu, Orhan1, Subramanian, R2, Robinson, Allen2, Harrison, David3, Chang, Yu-Chen3, Ondov, John3, 1 Florida International University, Miami, FL, USA2 Carnegie Mellon University, Pittsburgh, PA, USA3 University of Maryland, College Park, MD, USA
ABSTRACT- Organic particulate matter was collected using two different PM2.5/PUF sampling systems. At Pittsburgh, the individual sampling time was 24h and at Baltimore 3h. The samples obtained were analyzed for more than 100 organic compounds, including: n-alkanes, n-alkanoic acids, dicarboxylic acids, aromatic acids, resin acids, sterols, hopanes, PAH, oxy-PAH, sugars, thiazoles, secondary biogenic reaction products, and others. Here, an overview will be provided for key organic compounds that are potential source markers for primary sources and secondary atmospheric reaction products originating from natural or man-made organic precursor compounds. For Pittsburgh, the seasonal variability of ambient organic compound concentrations throughout an entire year will be discussed. For Baltimore, the diurnal variations of selected organic compounds will be discussed for several consecutive days.
Key words: PM2.5, Organic Compounds, PM Supersites
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