Enhancing non-refractory aerosol apportionment from an urban industrial site through receptor modelling of complete high time-resolution aerosol mass spectra

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dc.contributor.author McGuire, Maygan L.
dc.contributor.author Chang, Rachel Y. W.
dc.contributor.author Slowik, Jay G.
dc.contributor.author Jeong, Cheol-Heon
dc.contributor.author Healy, Robert M.
dc.contributor.author Lu, Gang
dc.contributor.author Mihele, Cristian
dc.contributor.author Abbatt, Jonathan P. D.
dc.contributor.author Brook, Jeffrey R.
dc.contributor.author Evans, Greg J.
dc.date.accessioned 2016-07-27T13:48:48Z
dc.date.available 2016-07-27T13:48:48Z
dc.date.issued 2014-02
dc.identifier.citation McGuire, M.L., Chang, R.Y.W., Slowik, J.G., Jeong, C.H., Healy, R.M., Lu, G., Mihele, C., Abbatt, J.P.D., Brook, J.R. and Evans, G. J. (2014) 'Enhancing non-refractory aerosol apportionment from an urban industrial site through receptor modelling of complete high time-resolution aerosol mass spectra', Atmospheric Chemistry and Physics Discussions, 14, pp. 5081–5145. doi:10.5194/acpd-14-5081-2014 en
dc.identifier.volume 14 en
dc.identifier.startpage 5081 en
dc.identifier.endpage 5145 en
dc.identifier.issn 1680-7367
dc.identifier.uri http://hdl.handle.net/10468/2944
dc.identifier.doi 10.5194/acpd-14-5081-2014
dc.description.abstract Receptor modelling was performed on quadrupole unit mass resolution aerosol mass spectrometer (Q-AMS) sub-micron particulate matter (PM) chemical speciation measurements from Windsor, Ontario, an industrial city situated across the Detroit River from Detroit, Michigan. Aerosol and trace gas measurements were collected on board Environment Canada’s CRUISER mobile laboratory. Positive matrix factorization (PMF) was performed on the AMS full particle-phase mass spectrum (PMFFull MS) encompassing both organic and inorganic components. This approach was compared to the more common method of analysing only the organic mass spectra (PMFOrg MS). PMF of the full mass spectrum revealed that variability in the non-refractory sub-micron aerosol concentration and composition was best explained by six factors: an amine-containing factor (Amine); an ammonium sulphate and oxygenated organic aerosol containing factor (Sulphate-OA); an ammonium nitrate and oxygenated organic aerosol containing factor (Nitrate-OA); an ammonium chloride containing factor (Chloride); a hydrocarbon like organic aerosol (HOA) factor; and a moderately oxygenated organic aerosol factor (OOA). PMF of the organic mass spectrum revealed three factors of similar composition to some of those revealed through PMFFull MS: Amine, HOA and OOA. Including both the inorganic and organic mass proved to be a beneficial approach to analysing the unit mass resolution AMS data for several reasons. First, it provided a method for potentially calculating more accurate sub-micron PM mass concentrations, particularly when unusual factors are present, in this case, an Amine factor. As this method does not rely on a priori knowledge of chemical species, it circumvents the need for any adjustments to the traditional AMS species fragmentation patterns to account for atypical species, and can thus lead to more complete factor profiles. It is expected that this method would be even more useful for HR-ToF-AMS data, due to the ability to better understand the chemical nature of atypical factors from high resolution mass spectra. Second, utilizing PMF to extract factors containing inorganic species allowed for the determination of extent of neutralization, which could have implications for aerosol parameterization. Third, subtler differences in organic aerosol components were resolved through the incorporation of inorganic mass into the PMF matrix. The additional temporal features provided by the inorganic aerosol components allowed for the resolution of more types of oxygenated organic aerosol than could be reliably re-solved from PMF of organics alone. Comparison of findings from the PMFFull MS and PMFOrg MS methods showed that for the Windsor airshed, the PMFFull MS method enabled additional conclusions to be drawn in terms of aerosol sources and chemical processes. While performing PMFOrg MS can provide important distinctions between types of organic aerosol, it is shown that including inorganic species in the PMF analysis can permit further apportionment of organics for unit mass resolution AMS mass spectra. en
dc.description.sponsorship Environment Canada (Research Affiliate Program) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Copernicus Publications on behalf of the European Geosciences Union (EGU) en
dc.rights © 2014, the Authors. This work is distributed under the Creative Commons Attribution 3.0 License. en
dc.rights.uri https://creativecommons.org/licenses/by/3.0/ en
dc.subject Aerosol en
dc.subject Mass spectrometry en
dc.subject Modeling en
dc.subject Particulate matter en
dc.subject Trace gas en
dc.subject Urban area en
dc.subject Speciation en
dc.title Enhancing non-refractory aerosol apportionment from an urban industrial site through receptor modelling of complete high time-resolution aerosol mass spectra en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Robert Healy, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: robert.healy@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2014-06-06T14:13:17Z
dc.description.version Accepted Version en
dc.internal.rssid 246626169
dc.contributor.funder Environment Canada
dc.description.status Peer reviewed en
dc.identifier.journaltitle Atmospheric Chemistry and Physics Discussions en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress robert.healy@ucc.ie en


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© 2014, the Authors. This work is distributed under the Creative Commons Attribution 3.0 License. Except where otherwise noted, this item's license is described as © 2014, the Authors. This work is distributed under the Creative Commons Attribution 3.0 License.
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