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Characterization of Aerosols at Fire S tation 8, Atlanta, GA

Characterization of Aerosols at Fire S tation 8, Atlanta, GA. Matt Kollman. Location. FS8. Location. FS8. Railyard. “most polluted area in Atlanta”. Measurements. Aerosol mass spectra using an Ambient Chemical S peciation M onitor (ACSM) on 30 minute saves

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Characterization of Aerosols at Fire S tation 8, Atlanta, GA

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  1. Characterization of Aerosols at Fire Station 8, Atlanta, GA Matt Kollman

  2. Location FS8

  3. Location FS8 Railyard “most polluted area in Atlanta”

  4. Measurements • Aerosol mass spectra using an Ambient Chemical Speciation Monitor (ACSM) on 30 minute saves • TEOM for PM2.5 mass concentrations • Black carbon concentrations • Aerosol light scattering data • Met data

  5. Aerosol composition over time

  6. Average composition • Sulfate is a much lower proportion of aerosol than expected • Total loading over whole period is typical of Atlanta

  7. Positive Matrix Factorization (PMF) • Mathematical model that identifies similarities across a dataset and groups into factors • Does not require a priori information • Useful for source apportionment

  8. Identification of factors

  9. Time series for three factor solution

  10. Discussion • Organic plumes that contain nitrate peaks at the end all come from the same source • Constant background of aged aerosol in Atlanta • Biomass burning signal may be due to prescribed burning outside Atlanta • Huge plumes in beginning of December equally due to BBOA and HOA

  11. Correlation with external data • Ions • Elemental and organic carbon • Wind speed, direction • Rain events

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