Grantee Research Project Results
Final 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 Amount: $459,556
RFA: Development of Environmental Health Outcome Indicators (2006) RFA Text | Recipients Lists
Research Category: Air Quality and Air Toxics , Air
Objective:
Our research focused on California’s South Coast Air Basin (SoCAB), which surrounds the city of Los Angeles. The SoCAB is an interesting and important case study because of the large population size (16 million people, or about 1 in 19 Americans), generally poor air quality (among the worst ambient concentrations in the United States; on average, the U.S. EPA 8-hour ambient ozone standard is violated 1–2 days per week), and an extensive ambient monitoring network (~33 monitors).
We hypothesized that exposure impacts of a given emission reduction strategy vary significantly among (1) source categories, (2) locations within an urban area, and (3) times of day. Our objective is to quantify source-to-receptor relationships using existing data and models, so that emission reductions can target sources and locations having the greatest impact on exposures and on environmental justice (EJ). We further aim to use our data to create a policy tool that will quantify exposure and EJ impacts of policy options.
Summary/Accomplishments (Outputs/Outcomes):
Figure 2: Change in the environmental justice (y-axis) and environmental equity (x-axis) metrics observed when emissions are reduced from specific emission sources. Larger x- and y-axis values indicate improvements. Based on these results, for the location modeled, train emissions yield maximal improvements in environmental justice and equity.
Figure 4: Comparison of intake fraction and mean intake, for the five sources.
Journal Articles on this Report : 6 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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Aggarwal S, Jain R, Marshall JD. Correction to real-time prediction of size-resolved ultrafine PM on freeways. Environmental Science & Technology 2012;46(13):7431-7432. |
R833624 (Final) |
Exit Exit Exit |
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Marshall JD. Environmental inequality:air pollution exposures in California's South Coast Air Basin. Atmospheric Environment 2008;42(21):5499-5503. |
R833624 (2008) R833624 (2009) R833624 (2011) R833624 (Final) |
Exit Exit Exit |
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Marshall JD, Swor KR, Nguyen NP. Prioritizing environmental justice and equality: diesel emissions in southern California. Environmental Science & Technology 2014;48(7):4063-4068. |
R833624 (Final) |
Exit Exit Exit |
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Nguyen NP, Marshall JD. Impact, efficiency, inequality, and injustice of urban air pollution: variability by emission location. Environmental Research Letters 2018;13(2):024002 (9 pp.). |
R833624 (Final) R835873 (2017) R835873 (2018) R835873 (Final) |
Exit Exit |
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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) |
Exit Exit |
Supplemental Keywords:
Diesel particles, environmental justice, environmental equality, exposure assessmentProgress 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.
Project Research Results
- 2011 Progress Report
- 2010 Progress Report
- 2009 Progress Report
- 2008 Progress Report
- Original Abstract
6 journal articles for this project