Temporal patterns in daily measurements of inorganic and organic speciated PM2.5 in Denver
Open accessAbstract
Airborne particulate matter less than 2.5 μm in aerodynamic diameter (PM 2.5) has been linked to a wide range of adverse health effects and as a result is currently regulated by the U.S. Environmental Protection Agency. PM 2.5 originates from a multitude of sources and has heterogeneous physical and chemical characteristics. These features complicate the link between PM 2.5 emission sources, ambient concentrations and health effects. The goal of the Denver Aerosol Sources and Health (DASH) study is to investigate associations between sources and health using daily measurements of speciated PM 2.5 in Denver. The datxa set being collected for the DASH study will be the longest daily speciated PM 2.5 data set of its kind covering 5.5 years of daily inorganic and organic speciated measurements. As of 2008, 4.5 years of bulk measurements (mass, inorganic ions and total carbon) and 1.5 years of organic molecular marker measurements have been completed. Several techniques were used to reveal long-term and short-term temporal patterns in the bulk species and the organic molecular marker species. All species showed a strong annual periodicity, but their monthly and seasonal behavior varied substantially. Weekly periodicities appear in many compound classes with the most significant weekday/weekend effect observed for elemental carbon, cholestanes, hopanes, select polycyclic aromatic hydrocarbons (PAHs), heavy n-alkanoic acids and methoxyphenols. Many of the observed patterns can be explained by meteorology or anthropogenic activity patterns while others do not appear to have such obvious explanations. Similarities and differences in these findings compared to those reported from other cities are highlighted.
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The major components of PAHs in Seoul and Denver were similar, and average winter PAH levels were 16.1 ± 10.1 ng/m3 in Seoul and 3.1 ± 0.4 ng/m3 in Denver.
“The major components of PAHs in Seoul and Denver were similar, and the average levels of PAHs during the winter season, according to the published data, are 16.1 ± 10.1ng/m3 and 3.1 ± 0.4 ng/m3 in Seoul and Denver, respectively (30–32).”
From Particulate matter causes skin barrier dysfunction. (2021) · cites this paper as [31]
The Methods (section 2.5) identify the PAHs measured in Denver, and the Results (section 3.2) describe their seasonal pattern, including a December maximum. The cited paper does not report the stated winter average of 3.1 ± 0.4 ng/m3 or compare Denver’s major PAH components with Seoul’s; it also does not support the Seoul figure. (LLM, conf=0.82)
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Particulate matter causes skin barrier dysfunction.
Kim, B. E., Kim, J., Goleva, E., Berdyshev, E., Lee, J., Vang, K. A., Lee, U. H., Han, S., Leung, S., Hall, C. F., et al. (2021) · JCI insight · doi:10.1172/jci.insight.145185 · Cited by 173 · see citing works
“4 ng/m3 in Seoul and Denver, respectively (30-32).”
BackgroundIntra-urban spatial variability of PM2.5-bound carbonaceous components
Xie, M., Coons, T. L., Dutton, S. J., Milford, J. B., Miller, S. L., Peel, J. L., Vedal, S., & Hannigan, M. P. (2012) · Atmospheric Environment · doi:10.1016/j.atmosenv.2012.05.041 · Cited by 27 · see citing works
Self-citation
- Authors
- Dutton, S. J., Rajagopalan, B., Vedal, S., & Hannigan, M. P.
- Affiliations
- Environmental Protection Agency (US)
- University of Colorado Boulder (US)
- University of Washington (US)
- Corresponding author
- Hannigan, Michael P.
- Venue
- Atmospheric Environment
- Publisher
- Elsevier BV
- Published
- 2010-03
- Volume
- 44
- Issue
- 7
- Pages
- 987-998
- ISSN
- 1352-2310 (ISSN-L)
- PMC
- PMC3593308
- OpenAlex
- W2038290739
- Cited by
- 33
- References
- 63
- Citations by year
- 2025: 1 · 2024: 1 · 2022: 2 · 2021: 8 · 2020: 1 · 2017: 1 · 2016: 3 · 2015: 2 · 2013: 4 · 2012: 8
- FWCI
- 2.06
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Atmospheric Environment (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Science Foundation
- U.S. Environmental Protection Agency
- National Institute of Environmental Health Sciences (R01ES012197)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Air Quality and Health Impacts
- Keywords
- PM2.5, inorganic ions, organic molecular markers, temporal patterns, seasonal variation, polycyclic aromatic hydrocarbons, elemental carbon, cholestane, hopanes, methoxyphenols, n-alkanoic acids, meteorological factors, human activities, Denver
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