Composition and Sources of Particulate Matter Measured near Houston, TX: Anthropogenic-Biogenic Interactions

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dc.citation.articleNumber73
dc.citation.issueNumber5en_US
dc.citation.journalTitleAtmosphereen_US
dc.citation.volumeNumber7en_US
dc.contributor.authorBean, Jeffrey K.en_US
dc.contributor.authorFaxon, Cameron B.en_US
dc.contributor.authorLeong, Yu Junen_US
dc.contributor.authorWallace, Henry Williamen_US
dc.contributor.authorCevik, Basak Karakurten_US
dc.contributor.authorOrtiz, Stephanieen_US
dc.contributor.authorCanagaratna, Manjula R.en_US
dc.contributor.authorUsenko, Saschaen_US
dc.contributor.authorSheesley, Rebecca J.en_US
dc.contributor.authorGriffin, Robert J.en_US
dc.contributor.authorRuiz, Lea Hildebrandten_US
dc.date.accessioned2016-07-07T21:09:20Z
dc.date.available2016-07-07T21:09:20Z
dc.date.issued2016en_US
dc.description.abstractParticulate matter was measured in Conroe, Texas (~60 km north of downtown Houston, Texas) during the September 2013 DISCOVER-AQ campaign to determine the sources of particulate matter in the region. The measurement site is influenced by high biogenic emission rates as well as transport of anthropogenic pollutants from the Houston metropolitan area and is therefore an ideal location to study anthropogenic-biogenic interactions. Data from an Aerosol Chemical Speciation Monitor (ACSM) suggest that on average 64 percent of non-refractory PM1 was organic material, including a high fraction (27%–41%) of organic nitrates. There was little diurnal variation in the concentrations of ammonium sulfate; however, concentrations of organic and organic nitrate aerosol were consistently higher at night than during the day. Potential explanations for the higher organic aerosol loadings at night include changing boundary layer height, increased partitioning to the particle phase at lower temperatures, and differences between daytime and nighttime chemical processes such as nitrate radical chemistry. Positive matrix factorization was applied to the organic aerosol mass spectra measured by the ACSM and three factors were resolved—two factors representing oxygenated organic aerosol and one factor representing hydrocarbon-like organic aerosol. The factors suggest that the measured aerosol was well mixed and highly processed, consistent with the distance from the site to major aerosol sources, as well as the high photochemical activity.en_US
dc.identifier.citationBean, Jeffrey K., Faxon, Cameron B., Leong, Yu Jun, et al.. "Composition and Sources of Particulate Matter Measured near Houston, TX: Anthropogenic-Biogenic Interactions." <i>Atmosphere,</i> 7, no. 5 (2016) MDPI: http://dx.doi.org/10.3390/atmos7050073.
dc.identifier.doihttp://dx.doi.org/10.3390/atmos7050073en_US
dc.identifier.urihttps://hdl.handle.net/1911/90842
dc.language.isoengen_US
dc.publisherMDPI
dc.rightsThis article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) licenseen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.subject.keywordorganic aerosolen_US
dc.subject.keywordambient measurementsen_US
dc.subject.keyworddiurnal variationen_US
dc.subject.keywordpositive matrix factorizationen_US
dc.titleComposition and Sources of Particulate Matter Measured near Houston, TX: Anthropogenic-Biogenic Interactionsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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