Ubiquity of ClNO2 in the urban boundary layer of Calgary, AB, Canada

Simple item page
dc.contributor.authorMielke, Levi H.
dc.contributor.authorFurgeson, Amanda
dc.contributor.authorOdame-Ankrah, Charles A.
dc.contributor.authorOsthoff, Hans D.
dc.date.accessioned2017-05-31T16:54:06Z
dc.date.available2017-05-31T16:54:06Z
dc.date.issued2015-12-17
dc.description.abstractThe role of nitryl chloride (ClNO2) as a nocturnal nitrogen oxide reservoir species and chlorine atom precursor is well established for polluted coastal areas, but its role at mid-continental locations is less clear. In this manuscript, intermittent measurements over the course of several seasons of ClNO2 mixing ratios by iodide ion chemical ionization mass spectrometry (CIMS) in Calgary, AB, Canada, are presented. Mixing ratios were highly variable between nights and seasons and depended on the abundances of precursors and meteorological conditions. The lowest ClNO2 mixing ratios (nocturnal maximum of 30 parts-per-trillion by volume, pptv) were observed in the summer, rationalized by losses of the nitrate radical (NO3) that were more efficient than in the other months. Higher ClNO2 mixing ratios (up to 330 pptv) were observed in the winter and spring months, but varied between nights. In the fall, ClNO2 mixing ratios increased from night to night following the application of salt to roads. The ClNO2 yield relative to the amount of NO3 produced from oxidation of NO2 by O3 ranged from 0.1% to 4.5% (10th and 90th percentiles; median 1.0%). The ClNO2 yield relative to consumed N2O5 consumed by heterogeneous reactions was estimated using a time-integrated box model and ranged from 0.5% to 12.1% (10th and 90th percentiles; median 3.4%). The ubiquity of ClNO2 implies that the Cl atom needs to be considered as an oxidant in high-latitude urban environments in winter.en_US
dc.description.grantingagencyNSERC - Tri-Agency Open Access Policyen_US
dc.description.refereedYesen_US
dc.description.sponsorshipThis work was made possible through financial support by the National Science and Engineering Research Council of Canada (NSERC) in the form of Discovery and Research Tools and Instruments (RTI) grants, by an Alberta Ingenuity New Faculty Award, and the University of Calgary via startup funding. Amanda Furgeson acknowledges a NSERC Alexander Graham Bell postgraduate scholarshipen_US
dc.identifier.citationMielke, L. H., A. Furgeson, C. A. Odame-Ankrah, and H. D. Osthoff (2016), Ubiquity of ClNO2 in the nocturnal boundary layer of Calgary, AB, Canada, Canadian Journal of Chemistry, 94(4), 414-423, doi:10.1139/cjc-2015-0426.en_US
dc.identifier.doi10.1139/cjc-2015-0426
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/35405
dc.identifier.grantnumberRGPIN/355607-2011en_US
dc.identifier.urihttp://hdl.handle.net/1880/51994
dc.language.isoenen_US
dc.publisherNRC Research Press (Canadian Science Publishing)en_US
dc.publisher.corporateUniversity of Calgary
dc.publisher.departmentChemistryen_US
dc.publisher.facultyScienceen_US
dc.publisher.institutionUniversity of Calgaryen_US
dc.publisher.urlhttp://www.nrcresearchpress.com/en_US
dc.subjectNitryl chlorideen_US
dc.subjecturban boundary layeren_US
dc.subjectseasonal dependenceen_US
dc.subjectchlorine activationen_US
dc.titleUbiquity of ClNO2 in the urban boundary layer of Calgary, AB, Canadaen_US
dc.typejournal article
thesis.degree.disciplineAnalytical
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Ubiquity of ClNO2 in the urban boundary layer of Calgary.pdf
Size:
3.52 MB
Format:
Adobe Portable Document Format
Description:
author final draft (post refereeing)
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.95 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Science Research & Publications