Single Particle Characterization, Source Apportionment, and Aging Effects of Ambient Aerosols in Southern California

Single Particle Characterization, Source Apportionment, and Aging Effects of Ambient Aerosols in Southern California

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The ATOFMS source apportionment method utilizes a library of distinct source mass spectral signatures to match the chemical information of the single ambient particles. The unique signatures are obtained in controlled source characterization studies, such as with the exhaust emissions of heavy duty diesel vehicles (HDDV) operating on a dynamometer. The apportionment of ambient aerosols is complicated by the chemical and physical processes an individual particle can undergo as it spends time in the atmosphere, which is referred to as qagingq of the aerosol. Therefore, the performance of the source signature library technique was investigated on the ambient dataset of the highly aged environment of Riverside, California. Additionally, two specific subsets of the Riverside dataset (ultrafine particles and particles containing trace metals), which are known to cause adverse health effects, were probed in greater detail. Finally, the impact of large wildfires on the ambient levels of particulate matter in Southern California is discussed.... Freightliner Cummins Cummins - - 689, 536 689, 536 7 7 1990 1990 HDD Tractor HDD Tractor Peterbilt Peterbilt Detroit Diesel Detroit Diesel Series 60 Series 60 399, 224 399, 224 8 8 1996 1996 HDD Tractor HDD Tractor Kenworth Kenworthanbsp;...


Title:Single Particle Characterization, Source Apportionment, and Aging Effects of Ambient Aerosols in Southern California
Author: Laura Grace Shields
Publisher:ProQuest - 2008
ISBN-13:

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