Sensitivity of source apportionment of urban particulate matter to uncertainty in motor vehicle emissions profiles.

Sensitivity of source apportionment of urban particulate matter to uncertainty in motor vehicle emissions profiles. Research Abstract Details 

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Sensitivity of source apportionment of urban particulate matter to uncertainty in motor vehicle emissions profiles. Abstract Text:

Glynis C Lough,James J Schauer,Glynis C Lough,James J Schauer,

A sensitivity analysis was conducted to characterize sources of uncertainty in results of a molecular marker source apportionment model of ambient particulate matter using mobile source emissions profiles obtained as part of the Gasoline/Diesel PM Split Study. A chemical mass balance (CMB) model was used to determine source contributions to samples of fine particulate matter (PM2.5) collected over 3 weeks at two sites in the Los Angeles area in July 2001. The ambient samples were composited for organic compound analysis by the day of the week to investigate weekly trends in source contributions. The sensitivity analysis specifically examined the impact of the uncertainty in mobile source emissions profiles on the CMB model results. The key parameter impacting model sensitivity was the source profile for gasoline smoker vehicles. High-emitting gasoline smoker vehicles with visible plumes were seen to be a significant source of PM in the area, but use of different measured profiles for smoker vehicles in the model gave very different results for apportionment of gasoline, diesel, and smoker vehicle tailpipe emissions. In addition, the contributions of gasoline and diesel emissions to total ambient PM varied as a function of the site and the day of the week.

Sensitivity of source apportionment of urban particulate matter to uncertainty in motor vehicle emissions profiles. Publishing Authors By Initials

GC Lough,JJ Schauer,GC Lough,JJ Schauer,

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Sensitivity of source apportionment of urban particulate matter to uncertainty in motor vehicle emissions profiles. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Journal of the Air & Waste Management Association

VOLUME: 57

Page Numbers: 1200-13

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ISSN: 1096-2247

DAY: 1

MONTH: Oct

YEAR: 2007

Sensitivity of source apportionment of urban particulate matter to uncertainty in motor vehicle emissions profiles. Information

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LANGUAGE: eng

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AFFILIATION: Environmental Chemistry and Technology Program, University of Wisconsin-Madison, Madison, WI, USA.

Country: United States

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MEDLINETA: J Air Waste Manag Assoc

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