| A decade of on-road emissions measurements. | |
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MedLine Citation:
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PMID: 18441816 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A multiyear, on-road emission measurement program carried out in the cities of Chicago, Illinois; Denver, Colorado; Los Angeles (LA), California; and Phoenix, Arizona shows large, fuel-specific tailpipe emissions reductions at all of the sites for carbon monoxide (CO), hydrocarbons (HC), and nitric oxide (NO). CO emissions decreased between 56% (Denver) and 71% (Chicago), HC emissions decrease between 27% (Phoenix) and 63% (Denver), and NO emissions have dropped between 48% (West LA) and 68% (Chicago). Three observed factors common to all of the sites are that the emission reductions are occurring in vehicles of all ages, that the influence of engine load on fuel-specific emissions, especially for CO and NO, is reduced and that fleet-averaged emission deterioration is near zero for model years newer than 2001 and older than 1990. These nationwide data sets imply that the majority of these on-road emissions reductions are the result of continued improvements in function and durability of vehicle emission control systems and that inspection and maintenance and fuel reformulation programs have only played a minor role. |
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Authors:
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Gary A Bishop; Donald H Stedman |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Environmental science & technology Volume: 42 ISSN: 0013-936X ISO Abbreviation: Environ. Sci. Technol. Publication Date: 2008 Mar |
Date Detail:
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Created Date: 2008-04-29 Completed Date: 2008-07-31 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: United States |
Other Details:
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Languages: eng Pagination: 1651-6 Citation Subset: IM |
Affiliation:
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Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, USA. gbishop@du.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Air Pollutants
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analysis* Vehicle Emissions / analysis* |
| Chemical | |
Reg. No./Substance:
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0/Air Pollutants; 0/Vehicle Emissions |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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