Topic
Particulates
About: Particulates is a research topic. Over the lifetime, 15137 publications have been published within this topic receiving 350400 citations. The topic is also known as: atmospheric particulate matter & APM.
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Health Canada1, Brigham Young University2, Imperial College London3, University of Washington4, Institute for Health Metrics and Evaluation5, Harvard University6, Research Triangle Park7, University of British Columbia8, King's College London9, University of California, Berkeley10, University of California, San Francisco11, University of Liverpool12, Fudan University13, World Health Organization14, University of Ottawa15, American Cancer Society16, Health Effects Institute17
TL;DR: A fine particulate mass–based RR model that covered the global range of exposure by integrating RR information from different combustion types that generate emissions of particulate matter is developed.
Abstract: Background: Estimating the burden of disease attributable to long-term exposure to fine particulate matter (PM2.5) in ambient air requires knowledge of both the shape and magnitude of the relative ...
1,468 citations
TL;DR: Satellite-derived total-column AOD, when combined with a chemical transport model, provides estimates of global long-term average PM2.5 concentrations, with significant spatial agreement with ground-based in situ measurements.
Abstract: BackgroundEpidemiologic and health impact studies of fine particulate matter with diameter < 2.5 μm (PM2.5) are limited by the lack of monitoring data, especially in developing countries. Satellite...
1,401 citations
TL;DR: In this paper, a chemical mass balance receptor model based on organic compounds was developed that relates sours; contributions to airborne fine particle mass concentrations and revealed source contributions to the concentrations of specific organic compounds.
1,396 citations
TL;DR: In this article, the authors search for conservative marker compounds suitable for tracing the presence of vehicular particulate exhaust emissions in the urban atmosphere, compile quantitative source profiles, and study the contributions of fine organic particulate vehicular exhaust to the Los Angeles atmosphere.
Abstract: Gasoline- and diesel-powered vehicles are known to contribute appreciable amounts of inhalable fine particulate matter to the atmosphere in urban areas. Internal combustion engines burning gasoline and diesel fuel contribute more than 21% of the primary fine particulate organic carbon emitted to the Los Angeles atmosphere. In the present study, particulate (d[sub p] [le] 2 [mu]m) exhaust emissions from six noncatalyst automobiles, seven catalyst-equipped automobiles, and two heavy-duty diesel trucks are examined by gas chromatography/mass spectrometry. The purposes of this study are as follows: (a) to search for conservative marker compounds suitable for tracing the presence of vehicular particulate exhaust emissions in the urban atmosphere, (b) to compile quantitative source profiles, and (c) to study the contributions of fine organic particulate vehicular exhaust to the Los Angeles atmosphere. More than 100 organic compounds are quantified, including n-alkanes, n-alkanoic acids, benzoic acids, benzaldehydes, PAH, oxy-PAH, steranes, pentacyclic triterpanes, azanaphthalenes, and others. Although fossil fuel markers such as steranes and pentacyclic triterpanes can be emitted from other sources, it can be shown that their ambient concentrations measured in the Los Angeles atmosphere are attributable mainly to vehicular exhaust emissions. 102 refs., 9 figs., 6 tabs.
1,343 citations
TL;DR: In this article, the authors focus on the transport and transformations of land-derived organic matter in the ocean, highlighting recent research on the patterns and processes involved in the degradation of terrestrial organic matter.
1,335 citations