Document Detail

Spatial analysis and land use regression of VOCs and NO(2) from school-based urban air monitoring in Detroit/Dearborn, USA.
MedLine Citation:
PMID:  19467697     Owner:  NLM     Status:  MEDLINE    
Passive ambient air sampling for nitrogen dioxide (NO(2)) and volatile organic compounds (VOCs) was conducted at 25 school and two compliance sites in Detroit and Dearborn, Michigan, USA during the summer of 2005. Geographic Information System (GIS) data were calculated at each of 116 schools. The 25 selected schools were monitored to assess and model intra-urban gradients of air pollutants to evaluate impact of traffic and urban emissions on pollutant levels. Schools were chosen to be statistically representative of urban land use variables such as distance to major roadways, traffic intensity around the schools, distance to nearest point sources, population density, and distance to nearest border crossing. Two approaches were used to investigate spatial variability. First, Kruskal-Wallis analyses and pairwise comparisons on data from the schools examined coarse spatial differences based on city section and distance from heavily trafficked roads. Secondly, spatial variation on a finer scale and as a response to multiple factors was evaluated through land use regression (LUR) models via multiple linear regression. For weeklong exposures, VOCs did not exhibit spatial variability by city section or distance from major roads; NO(2) was significantly elevated in a section dominated by traffic and industrial influence versus a residential section. Somewhat in contrast to coarse spatial analyses, LUR results revealed spatial gradients in NO(2) and selected VOCs across the area. The process used to select spatially representative sites for air sampling and the results of coarse and fine spatial variability of air pollutants provide insights that may guide future air quality studies in assessing intra-urban gradients.
Shaibal Mukerjee; Luther A Smith; Mary M Johnson; Lucas M Neas; Casson A Stallings
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2009-05-20
Journal Detail:
Title:  The Science of the total environment     Volume:  407     ISSN:  1879-1026     ISO Abbreviation:  Sci. Total Environ.     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-06-16     Completed Date:  2009-09-04     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  4642-51     Citation Subset:  IM    
National Exposure Research Laboratory, U.S. Environmental Protection Agency (E205-03), Research Triangle Park, NC 27711, USA.
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MeSH Terms
Air / analysis,  standards
Air Pollutants / analysis*
Environmental Monitoring / methods*,  statistics & numerical data
Geographic Information Systems
Models, Theoretical*
Nitrogen Dioxide / analysis*
Organic Chemicals / analysis*
Particulate Matter / analysis
Schools / standards*
Urban Health
Reg. No./Substance:
0/Air Pollutants; 0/Organic Chemicals; 0/Particulate Matter; 10102-44-0/Nitrogen Dioxide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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