title: UNMIX modeling of ambient PM(2.5) near an interstate highway in Cincinnati, OH, USA.
abstract: The "Cincinnati Childhood Allergy and Air Pollution Study (CCAAPS)" is underway to determine if infants who are exposed to diesel engine exhaust particles are at an increased risk for atopy and atopic respiratory disorders, and to determine if this effect is magnified in a genetically at risk population. In support of this study, a methodology has been developed to allocate local traffic source contributions to ambient PM(2.5) in the Cincinnati airshed. As a first step towards this allocation, UNMIX was used to generate factors for ambient PM(2.5) at two sites near at interstate highway. Procedures adopted to collect, analyze and prepare the data sets to run UNMIX are described. The factors attributed to traffic sources were similar for the two sites. These factors were also similar to locally measured truck engine-exhaust enriched ambient profiles. The temporal variation of the factors was analyzed with clear differences observed between factors attributed to traffic sources and combustion-related regional secondary sources.
authors: Environmental Engineering Science, Campus Box 1180, Washington University in St. Louis, St. Louis, MO 63130, USA.
authors: Shaohua
authors: S
authors: Hu
authors: Rafael
authors: R
authors: McDonald
authors: Dainius
authors: D
authors: Martuzevicius
authors: Pratim
authors: P
authors: Biswas
authors: Sergey A
authors: SA
authors: Grinshpun
authors: Anna
authors: A
authors: Kelley
authors: Tiina
authors: T
authors: Reponen
authors: James
authors: J
authors: Lockey
authors: Grace
authors: G
authors: Lemasters