Weak correlation of ultrafine aerosol particle concentrations <800 nm between two sites within one city

Journal of Exposure Science & Environmental Epidemiology
T TuchJost Heintzenberg

Abstract

Ambient aerosol has been identified as a major pollutant affecting human health. Standards to reduce particles mass concentrations have therefore been established in many countries. Recent studies suggest that the number concentration of aerosol particles, which is dominated by the ultrafine size range smaller than 100 nm in diameter, may be independently associated with health effects. Currently, epidemiological evidence for such effects is conflicting. We have measured aerosol size distributions at two stations (urban background, street canyon) located at a distance of 1.5 km for a time period of 1 year. Number concentrations and particle size distributions at both sites were significantly different. Short-term correlation between the two sites was weak for individual measurements of number concentrations and size bins of ultrafine particles (0.19-0.46). Correlation coefficients for hourly and daily averages in selected size ranges ranged from 0.35 to 0.46. On the other hand, the correlation coefficient for daily average particle volume concentrations was found to be 0.67. About 10% to 20% of the population of European cities lives close to roads with traffic densities comparable to our site. The underestimation of the exposu...Continue Reading

References

Jan 1, 1994·Annual Review of Public Health·D W Dockery, C A Pope
Apr 1, 1997·American Journal of Respiratory and Critical Care Medicine·A PetersJ Heyder

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Citations

Aug 9, 2011·Environmental Monitoring and Assessment·Chi Kwan ChauWai Kwan Hui
Apr 27, 2011·Journal of the Air & Waste Management Association·Ulrich UhrnerAlfred Wiedensohler

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