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HERO ID
2214266
Reference Type
Journal Article
Title
First measurements of source apportionment of organic aerosols in the Southern Hemisphere
Author(s)
Crilley, LR; Ayoko, GA; Morawska, L
Year
2014
Is Peer Reviewed?
Yes
Journal
Environmental Pollution
ISSN:
0269-7491
EISSN:
1873-6424
Volume
184
Page Numbers
81-88
Language
English
PMID
24035913
DOI
10.1016/j.envpol.2013.08.015
Web of Science Id
WOS:000329419200010
Abstract
An Aerodyne Aerosol Mass Spectrometer was deployed at five urban schools to examine spatial and temporal variability of organic aerosols (OA) and positive matrix factorization (PMF) used for the first time in the Southern Hemisphere to apportion the sources of the OA across an urban area. The sources identified included hydrocarbon-like OA (HOA), biomass burning OA (BBOA) and oxygenated OA (OOA). At all sites, the main source was OOA, which accounted for 62-73% of the total OA mass and was generally more oxidized compared to those reported in the Northern Hemisphere. This suggests that there are differences in aging processes or regional sources in the two hemispheres. Unlike HOA and BBOA, OOA demonstrated instructive temporal variations but not spatial variation across the urban area. Application of cluster analysis to the PMF-derived sources offered a simple and effective method for qualitative comparison of PMF sources that can be used in other studies.
Keywords
Aerosol mass spectrometry; Organic aerosols; Urban environments; Positive matrix factorization
Tags
NAAQS
•
ISA-PM (2019)
•
MSA-Multipollutant Exposure Metric Review
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