Impact/Purpose:

Roadway-source air pollutants encompass a diversity of chemicals, including both particulate and gas phase components which are transformed by chemical and physical reactions as they age in the environment. Consequently, human exposures to air pollutants can range from relatively un-aged to highly aged components that vary with respect to particle size and the chemical composition of particle and gas phase components. This proposal is will employ mobile and fixed site monitoring to assess both gas and particle components of these pollutants as they age from roadway sources to population areas, for a more comprehensive understanding of the seasonal and spatial variability in the concentration and composition of air pollutant exposures within MESA-Air cities. The main project objectives are: (1) Characterize spatial and temporal gradients of selected air pollutants along roadways and within neighborhoods in MESA cities using a mobile platform; (2) Measure spatial variation in concentrations of selected air pollutants at two-week average fixed sites in coordination with the mobile measurements. (3) Characterize aging of air pollutant components transported from roadway sources to neighborhood receptor locations; and (4) Provide detailed characterization of laboratory exposure conditions available for toxicology testing, and identify likely conditions that mimic those found in urban settings.

Description:

In this project, we will (1) develop multivariate spatial models of selected roadway-source air pollutants for use in health studies; (2) characterize the aging of roadway source air pollutant components as they are transported from sources to populated areas; (3) characterize the laboratory multi-pollutant atmospheres for toxicology testing, to help describe physical and chemical transformation processes occurring in the laboratory and to help determine the comparability of conditions generated by in the laboratory to those observed in the field.

URLs/Downloads:

2011 Progress Report

Record Details:

Record Type:PROJECT( ABSTRACT )

Start Date:12/01/2010

Completion Date:11/30/2015

Record ID: 248942

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Related Organizations:

Role :OWNER

Organization Name :UNIVERSITY OF WASHINGTON

Organization Name :UW CCAR

Mailing Address :1410 NE Campus Parkway

Citation :Seattle

State :WA

Zip Code :98195



Role :OWNER

Organization Name :WASHINGTON STATE UNIVERSITY

Organization Name :UW CCAR

Mailing Address :Institutional Research

Citation :Pullman

State :WA

Zip Code :99164

Project Information:

Approach :

We will (1) use mobile monitoring with an instrument platform designed to measure concentrations of particles and gases while continuously on the move. These data will be used by the Biostatistics Core to develop multivariate spatial models of selected roadway-source air pollutants for use in health studies, and to characterize the aging of air pollutant components as they are transported from sources to populated areas; (2) use passive monitoring at approximately 20 stationary sites in each of the four MESA cities to measure concentrations of coarse particles, gases (O3, SO2, NO, NO2), and selected volatile organic compounds (VOCs). These measurements will be used in conjunction with the mobile measurements to develop multivariate spatial models of selected roadway-source air pollutants; (3) characterize the laboratory exposure conditions available for toxicology testing, and identify likely conditions that mimic those found in urban settings. This will be achieved by deploying the same instruments used in the mobile monitoring platform, along with LRRI instruments and additional high sensitivity mass-spectrometer instruments only available for the laboratory facilities (Aerosol TOF-MS for particles and PTR-MS for VOCs).

Cost :$1,129,676.00

Research Component :Health Effects

Project IDs:

ID Code :R834796C001

Project type :Center