Title

Development of outcome-based, multipollutant mobile source indicators

DOI

https://doi.org/10.1080/10473289.2012.656218

Document Type

Article

Publication Date

1-1-2012

Publication Title

Journal of the Air and Waste Management Association

Abstract

Multipollutant indicators of mobile source impacts are developed from readily available CO, NO , and elemental carbon (EC) data for use in air quality and epidemiologic analysis. Two types of outcome-based Integrated Mobile Source Indicators (IMSI) are assessed. The first is derived from analysis of emissions of EC, CO, and NO such that pollutant concentrations are mixed and weighted based on emission ratios for both gasoline and diesel vehicles. The emission-based indicators (IMSI ) capture the impact of mobile sources on air quality estimated from receptor models and their uncertainty is comparable to measurement and source apportionment uncertainties. The IMSI have larger correlation between two different receptor sites impacted by traffic than single pollutants, suggesting they are better indicators of the local impact of mobile sources. A sensitivity analysis of fractions of pollutants in a two-pollutant mixture and the inclusion in an epidemiologic model is conducted to develop a second set of indicators based on health outcomes. The health-based indicators (IMSI ) are weighted combinations of CO, NO , and EC pairs that have the lowest P value in their association with cardiovascular disease emergency department visits, possibly due to their better spatial representativeness. These outcome-based, multipollutant indicators can provide support for the setting of multipollutant air quality standards and other air quality management activities. Implications: Integrated mobile source indicators (IMSI) were developed and assessed for use in air quality and epidemiologic analysis. IMSI contribute to fill the gap in the path towards a multipollutant air quality approach in two aspects: IMSI represent an innovative way to identify mixtures of pollutants based on outcomes and constitutes an alternative approach to assess multipollutant health effects. IMSI developed for mobile sources can be easily applied to other sources. Results can support the setting of multipollutant air quality standards. Supplemental Material: Supplemental materials are available for this article. Go to the publisher's online edition of the Journal of the Air & Waste Management Association for materials showing the estimation of uncertainties using propagation of errors, comparison of source impacts from CMB and PMF and wind direction and speed for the Jefferson Street monitoring location in Atlanta. © 2012 A&WMA. x x EB EB HB x

Volume

62

Issue

4

First Page

431

Last Page

442

ISSN

10962247

PubMed ID

22616285

Identifier

SCOPUS_ID:84859380968

Documento original

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