Examining the representativeness of home outdoor PM2.5, EC, and OC estimates for daily personal exposures in Southern CaliforniaReport as inadecuate




Examining the representativeness of home outdoor PM2.5, EC, and OC estimates for daily personal exposures in Southern California - Download this document for free, or read online. Document in PDF available to download.

Air Quality, Atmosphere and Health

, Volume 5, Issue 3, pp 335–351

First Online: 15 October 2010Received: 06 March 2010Accepted: 02 September 2010

Abstract

Recent studies have linked acute respiratory and cardiovascular outcomes to measurements or estimates of traffic-related air pollutants at homes or schools. However, few studies have evaluated these outdoor measurements and estimates against personal exposure measurements. We compared measured and modeled home outdoor concentrations with personal measurements of traffic-related air pollutants in the Los Angeles air basin Whittier and Riverside. Personal exposure of 63 children with asthma and 15 homes were assessed for particulate matter with an aerodynamic diameter less than 2.5 μm PM2.5, elemental carbon EC, and organic carbon OC during sixteen 10-day monitoring runs. Regression models to predict daily home outdoor PM2.5, EC, and OC were constructed using home outdoor measurements, geographical and meteorological parameters, as well as CALINE4 estimates at outdoor home sites, which represent the concentrations from local traffic sources. These home outdoor models showed the variance explained R was 0.97 and 0.94 for PM2.5, 0.91 and 0.83 for OC, and 0.76 and 0.87 for EC in Riverside and Whittier, respectively. The PM2.5 outdoor estimates correlated well with the personal measurements Riverside R = 0.65 and Whittier R = 0.69. However, excluding potentially inaccurate samples from Riverside, the correlation between personal exposure to carbonaceous species and home outdoor estimates in Whittier was moderate for EC R = 0.37 and poor for OC R = 0.08. The CALINE4 estimates alone were not correlated with personal measurements of EC or other pollutants. While home outdoor estimates provide good approximations for daily personal PM2.5 exposure, they may not be adequate for estimating daily personal exposure to EC and OC.

KeywordsAir pollution Elemental carbon Organic carbon Exposure modeling Traffic exhaust Electronic supplementary materialThe online version of this article doi:10.1007-s11869-010-0099-y contains supplementary material, which is available to authorized users.

Download fulltext PDF



Author: Regina E. Ducret-Stich - Ralph J. Delfino - Thomas Tjoa - Armin Gemperli - Alex Ineichen - Jun Wu - Harish C. Phuleria -

Source: https://link.springer.com/







Related documents