Low levels of nitryl chloride at ground level: nocturnal nitrogen oxides in the Lower Fraser Valley of British Columbia

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dc.contributor.authorOsthoff, Hans D.
dc.contributor.authorOdame-Ankrah, Charles A.
dc.contributor.authorTaha, Youssef M.
dc.contributor.authorTokarek, Travis W.
dc.contributor.authorSchiller, Corinne L.
dc.contributor.authorHaga, Donna
dc.contributor.authorJones, Keith
dc.contributor.authorVingarzan, Roxanne
dc.date.accessioned2021-06-25T20:44:41Z
dc.date.available2021-06-25T20:44:41Z
dc.date.issued2018-05-04
dc.description.abstractThe nocturnal nitrogen oxides, which include the nitrate radical (NO3), dinitrogen pentoxide (N2O5), and its uptake product on chloride containing aerosol, nitryl chloride (ClNO2), can have profound impacts on the lifetime of NOx (= NO + NO2), radical budgets, and next-day photochemical ozone (O3) production, yet their abundances and chemistry are only sparsely constrained by ambient air measurements. Here, we present a measurement data set collected at a routine monitoring site near the Abbotsford International Airport (YXX) located approximately 30 km from the Pacific Ocean in the Lower Fraser Valley (LFV) on the west coast of British Columbia. Measurements were made from 20 July to 4 August 2012 and included mixing ratios of ClNO2, N2O5, NO, NO2, total odd nitrogen (NOy), O3, photolysis frequencies, and size distribution and composition of non-refractory submicron aerosol (PM1). At night, O3 was rapidly and often completely removed by dry deposition and by titration with NO of anthropogenic origin and unsaturated biogenic hydrocarbons in a shallow nocturnal inversion surface layer. The low nocturnal O3 mixing ratios and presence of strong chemical sinks for NO3 limited the extent of nocturnal nitrogen oxide chemistry at ground level. Consequently, mixing ratios of N2O5 and ClNO2 were low (< 30 and < 100 parts-per-trillion by volume (pptv) and median nocturnal peak values of 7.8 and 7.9 pptv, respectively). Mixing ratios of ClNO2 frequently peaked 1–2 h after sunrise rationalized by more efficient formation of ClNO2 in the nocturnal residual layer aloft than at the surface and the breakup of the nocturnal boundary layer structure in the morning. When quantifiable, production of ClNO2 from N2O5 was efficient and likely occurred predominantly on unquantified supermicron-sized or refractory sea-salt-derived aerosol. After sunrise, production of Cl radicals from photolysis of ClNO2 was negligible compared to production of OH from the reaction of O(1D) + H2O except for a short period after sunrise.en_US
dc.description.grantingagencyNatural Sciences and Engineering Research Council (NSERC)en_US
dc.identifier.citationOsthoff, H.D., Odame-Ankrah, C.A., Taha, Y.M., Tokarek, T.W., Schiller, C.L., Haga, D., Jones, K., & Vingarzan, R. (2018). Low levels of nitryl chloride at ground level: Nocturnal nitrogen oxides in the Lower Fraser Valley of British Columbia. Atmospheric Chemistry and Physics 18(9), 6293–6315. https://doi.org/10.5194/acp-18-6293-2018en_US
dc.identifier.doihttp://dx.doi.org/10.5194/acp-18-6293-2018en_US
dc.identifier.grantnumberRGPIN/03849-2016en_US
dc.identifier.issn1680-7324
dc.identifier.issn1680-7316
dc.identifier.urihttp://hdl.handle.net/1880/113536
dc.language.isoengen_US
dc.publisherCopernicus Publicationsen_US
dc.publisher.departmentChemistryen_US
dc.publisher.facultyScienceen_US
dc.publisher.hasversionpublishedVersionen_US
dc.publisher.institutionUniversity of Calgaryen_US
dc.publisher.policyhttps://www.nonlinear-processes-in-geophysics.net/policies/licence_and_copyright.htmlen_US
dc.rightsUnless otherwise indicated, this material is protected by copyright and has been made available with authorization from the copyright owner. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.subjectNitrogen oxideen_US
dc.subjectEnvironmental aspectsen_US
dc.subjectDichloropropaneen_US
dc.subjectChemical propertiesen_US
dc.subjectChloridesen_US
dc.titleLow levels of nitryl chloride at ground level: nocturnal nitrogen oxides in the Lower Fraser Valley of British Columbiaen_US
dc.typejournal articleen_US
ucalgary.item.requestcopytrueen_US
ucalgary.scholar.levelFacultyen_US
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