PhD Defense by Jennifer Moutinho

Event Details
  • Date/Time:
    • Monday October 29, 2018
      10:00 am - 12:00 pm
  • Location: Mason 2228
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Summaries

Summary Sentence: Characterizing Traffic-Related Air Pollutant Dynamics in a Near-Road Environment

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School of Civil and Environmental Engineering

 

Ph.D. Thesis Defense Announcement

 

Characterizing Traffic-Related Air Pollutant Dynamics in a Near-Road Environment

 

By

Jennifer Mouthinho

 

Advisor:

Dr. Armistead Russell (CEE)

 

Committee Members:

Dr. Jim Mulholland (CEE), Dr. Jeremy Sarnat (Emory), Dr. Stefanie Sarnat (Emory), Dr. Rodney Weber (EAS)

 

Date & Time: Monday, October 29, 10am

 

Location: Mason 2228

Detailed measurements and dispersion modeling were conducted to develop more accurate integrated metrics to assess exposure to potentially high pollutant levels of primary traffic emissions. A 13-week intensive sampling campaign was conducted at six monitoring sites surrounding one of the busiest highway segment in the US with the study area focusing on the Georgia Institute of Technology campus to capture the heterogeneity in pollutant concentrations related to primary traffic emissions. Differences in temporal pollutant concentrations at two near-road monitoring sites along the same road segment showed microenvironment characteristics are a driving factor in observations. Multipollutant metrics and dispersion modeling are two ways to quantify exposure to mobile source emissions. A statistical and biological metric provided incite on how they could be applied in future near-road studies. A dispersion model (RLINE) was used to develop spatial concentration fields at a fine-spatial resolution over the area of primary exposures. To correct for high near-road bias, the RLINE results were calibrated using measurement observations after the urban background was removed. Performing the calibration hourly also reduced the bias observed in the diurnal profile. Both the measurement observations and dispersion modeling results show that the highway has a substantial impact on primary traffic pollutant concentrations and captures the prominent spatial gradients across the campus domain, though the gradients were highly species dependent. These improved concentration fields were used to enhance the characterization of pollutant spatial distribution around a traffic hotspot and to quantify personal exposure to primary traffic emissions.

 

Additional Information

In Campus Calendar
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Graduate Education and Faculty Development

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Faculty/Staff, Public, Graduate students, Undergraduate students
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Other/Miscellaneous
Keywords
Phd Defense
Status
  • Created By: Tatianna Richardson
  • Workflow Status: Published
  • Created On: Oct 16, 2018 - 11:02am
  • Last Updated: Oct 16, 2018 - 11:02am