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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Hasheminassab, Sina Pakbin, Payam Delfino, Ralph J. Schauer, James J. Sioutas, Constantinos |
| Spatial Coverage | Los Angeles |
| Description | Country affiliation: United States Author Affiliation: Hasheminassab S ( University of Southern California, Department of Civil and Environmental Engineering, 3620 South Vermont Avenue, Los Angeles, CA 90089, USA.); Pakbin P ( University of Southern California, Department of Civil and Environmental Engineering, 3620 South Vermont Avenue, Los Angeles, CA 90089, USA.); Delfino RJ ( University of California, Department of Epidemiology, School of Medicine, 224 Irvine Hall, Irvine, CA 92697, USA.); Schauer JJ ( University of Wisconsin-Madison, Environmental Chemistry and Technology Program, 660 North Park Street, Madison, WI 53706, USA.); Sioutas C ( University of Southern California, Department of Civil and Environmental Engineering, 3620 South Vermont Avenue, Los Angeles, CA 90089, USA. Electronic address: sioutas@usc.edu.) |
| Abstract | Diurnal and seasonal variations in the apparent density of ambient fine and coarse particulate matter (PM2.5 and CPM [PM2.5-10], respectively) were investigated in a location near downtown Los Angeles. The apparent densities, determined by particle mass-to-volume ratios, showed strong diurnal and seasonal variations, with higher values during the warm phase (June to August 2013) compared to cold phase (November 2012 to February 2013). PM2.5 apparent density showed minima during the morning and afternoon rush hours of the cold phase (1.20g cm(-3)), mainly due to the increased contribution of traffic-emitted soot particles, and highest values were found during the midday in the warm phase (2.38g cm(-3)). The lowest CPM apparent density was observed during the morning rush hours of the cold phase (1.41g cm(-3)), while highest in early afternoon during the warm phase (2.91g cm(-3)), most likely due to the increased wind-induced resuspension of road dust. |
| File Format | HTM / HTML |
| ISSN | 02697491 |
| e-ISSN | 18736424 |
| DOI | 10.1016/j.envpol.2013.12.015 |
| Journal | Environmental Pollution |
| Volume Number | 187 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-04-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Discipline Environmental Discipline Science Air Pollutants Environmental Monitoring Particulate Matter Air Pollution Statistics & Numerical Data Los Angeles Seasons Soot Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Health, Toxicology and Mutagenesis Pollution Medicine Toxicology |
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