Correlations Between Short-Term Mobile Monitoring and Long-Term Passive Sampler Measurements of Traffic-Related Air Pollution

Details

• Personal Author:
  Crampton R ; Gould TR ; Hartin K ; Larson T ; Riley EA ; Sasakura M ; Schaal L ; Sheppard L ; Simpson CD ; Yost MG
• Description:
  Mobile monitoring has provided a means for broad spatial measurements of air pollutants that are otherwise impractical to measure with multiple fixed site sampling strategies. However, the larger the mobile monitoring route the less temporally dense measurements become, which may limit the usefulness of short-term mobile monitoring for applications that require long-term averages. To investigate the stationarity of short-term mobile monitoring measurements, we calculated long term medians derived from a mobile monitoring campaign that also employed 2-week integrated passive sampler detectors (PSD) for NOx, Ozone, and nine volatile organic compounds at 43 intersections distributed across the entire city of Baltimore, MD. This is one of the largest mobile monitoring campaigns in terms of spatial extent undertaken at this time. The mobile platform made repeat measurements every third day at each intersection for 6-10 min at a resolution of 10 s. In two-week periods in both summer and winter seasons, each site was visited 3-4 times, and a temporal adjustment was applied to each dataset. We present the correlations between eight species measured using mobile monitoring and the 2-week PSD data and observe correlations between mobile NOx measurements and PSD NOx measurements in both summer and winter (Pearson's r = 0.84 and 0.48, respectively). The summer season exhibited the strongest correlations between multiple pollutants, whereas the winter had comparatively few statistically significant correlations. In the summer CO was correlated with PSD pentanes (r = 0.81), and PSD NOx was correlated with mobile measurements of black carbon (r = 0.83), two ultrafine particle count measures (r = 0.8), and intermodal (1-3 µm) particle counts (r = 0.73). Principal Component Analysis of the combined PSD and mobile monitoring data revealed multipollutant features consistent with light duty vehicle traffic, diesel exhaust and crankcase blow by. These features were more consistent with published source profiles of traffic-related air pollutants than features based on the PSD data alone. Short-term mobile monitoring shows promise for capturing long-term spatial patterns of traffic-related air pollution, and is complementary to PSD sampling strategies. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Air Pollution Occupational Health Ozone Particulate Matter Safety Transportation
• Keywords:
  Air Pollutants Air Pollution Air Quality Monitoring Author Keywords: Traffic-related Air Pollution Black Carbon Diesel Exhaust Mobile Monitoring Particulates Seasonal Factors Ultrafine Particles
• ISSN:
  1352-2310
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Maryland ; OSHA Region 10 ; OSHA Region 3 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  229-239
• Volume:
  132
• NIOSHTIC Number:
  nn:20063768
• Citation:
  Atmos Environ 2016 May; 132:229-239
• Contact Point Address:
  Erin A. Riley, University of Washington Department of Environmental and Occupational Health Sciences, Box 357234, Seattle, WA 98198, USA
• Email:
  eriley1@uw.edu
• CAS Registry Number:
  Ozone (CAS RN 10028-15-6)
• Federal Fiscal Year:
  2016
• Performing Organization:
  University of Washington
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Atmospheric Environment
• End Date:
  20250630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9b74936d8cc3cba3e48aebfeae68b85eb6a971ae2669e6288079f3aba11e26e8dc3803207709ee1817485a21c3a4c569591049c91c8b76351585a104219dbaf4
• Download URL:
  https://stacks.cdc.gov/view/cdc/222324/cdc_222324_DS1.pdf
• File Type:
  [PDF - 4.06 MB ]