Grantee Research Project Results
2010 Progress Report: Impact of Emission Reductions on Exposures and Exposure Distributions: Application of a Geographic Exposure Model
EPA Grant Number: R833624Title: Impact of Emission Reductions on Exposures and Exposure Distributions: Application of a Geographic Exposure Model
Investigators: Marshall, Julian D. , Ramachandran, Gurumurthy
Institution: University of Minnesota School of Public Health
EPA Project Officer: Hahn, Intaek
Project Period: September 1, 2007 through October 31, 2010 (Extended to February 29, 2012)
Project Period Covered by this Report: September 1, 2009 through August 31,2010
Project Amount: $459,556
RFA: Development of Environmental Health Outcome Indicators (2006) RFA Text | Recipients Lists
Research Category: Air Quality and Air Toxics , Air
Objective:
The objective of this project is to quantify source-to-receptor relationships and evaluate potential emissions reduction strategies. We use an air quality model and various exposure models to determine the optimal sources or locations to target for air quality management.
Progress Summary:
Research efforts in 2009-2010 have included continued analysis of model data and new data generation of results from spatially targeted hypothetical emissions reduction strategies. We model the air pollution and exposure benefit that would be expected from reducing diesel-generated emission of particulate matter in southern California. We model emissions reductions of one ton per week from each of the five sources of diesel PM: off-road mobile sources, on-road mobile sources, ships, trains, and stationary sources. Results can be framed in terms of two impacts – reductions in mean exposure level and reductions in environmental injustice – for each emission reduction option. Our research aims to highlight tradeoffs and win-win opportunities. Results from the source-specific emissions research suggest that reductions to ship and train emissions would have the maximum exposure and environmental justice benefit per emission reduction, as compared to on-road, off-road, or stationary sources. These research results are being prepared for publication.
Additional research is focused on determining where, if any, hotspots in the South Coast exist where total diesel emissions can be targeted for reduction. Air quality modeling focuses on reducing emissions from an entire grid cell and comparing results in terms of mean exposure level as well as environmental injustice. This research is in the data-processing step and will be completed this spring.
Future Activities:
Future activities will include publishing a journal article entitled, “Environmental justice and air pollution: Evaluating opportunities for improvement,” which details the work done with source-specific sources of pollution. Analysis of the data generated from different spatial strategies for emissions reduction will continue and a journal article will be written. The project will be completed by September 2011, as per the approved one-year extension.
Journal Articles on this Report : 2 Displayed | Download in RIS Format
| Other project views: | All 15 publications | 6 publications in selected types | All 6 journal articles |
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Aggarwal S, Jain R, Marshall JD. Real-time prediction of size-resolved ultrafine particulate matter on freeways. Environmental Science & Technology 2012;46(4):2234-2241. |
R833624 (2010) R833624 (2011) R833624 (Final) |
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Setton E, Marshall JD, Brauer M, Lundquist KR, Hystad P, Keller P, Cloutier-Fisher D. The impact of daily mobility on exposure to traffic-related air pollution and health effect estimates. Journal of Exposure Science & Environmental Epidemiology 2011;21(1):42-48. |
R833624 (2010) R833624 (2011) R833624 (Final) |
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Supplemental Keywords:
Exposure, air pollution, intake fraction, sensitive subpopulations, decision making, California, South Coast Air Basin, environmental justice, CAMx air dispersion model.Relevant Websites:
http://personal.ce.umn.edu/~marshall Exit
Progress and Final Reports:
Original AbstractThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.