Identifying Changes in Source Regions Impacting Speciated Atmospheric Mercury at a Rural Site in the Eastern United States

Cheng, Irene; Zhang, Leiming; Castro, Mark; Mao, Huiting

doi:https://open-science.canada.ca/handle/123456789/1339

Identifying Changes in Source Regions Impacting Speciated Atmospheric Mercury at a Rural Site in the Eastern United States

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dc.contributor.author: Cheng, Irene; Zhang, Leiming; Castro, Mark; Mao, Huiting
dc.date.accepted: 2017-05-17
dc.date.accessioned: 2023-12-07T20:36:12Z
dc.date.available: 2023-12-07T20:36:12Z
dc.date.issued: 2017-11-01
dc.date.submitted: 2017-05-16
dc.description.abstract - en: To investigate the effectiveness of emission reductions on the concentrations of gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and particulate-bound mercury (PBM) at a rural site in Maryland (MD08), long-term (2005–14) measurements of speciated atmospheric mercury were analyzed using concentration-weighted trajectory (CWT) analysis. CWT results suggested that the number of major source regions contributing to GEM, GOM, and reactive mercury (RM = GOM + PBM) over the eastern United States and southeastern Canada declined over time. Across much of these regions, source contributions in 2011–14 decreased by up to 20% for GEM, by greater than 60% for GOM, and by 20%–60% for PBM compared to 2006–08, largely because of the decreases in power-plant mercury emissions since 2009. Changes in the spatial distribution of the source regions were also observed over time. Increases in source contributions of GEM after 2011 over the northeastern United States and southeastern Canada were predominantly from emission increases in metal and steel production and forest fires. Source contribution increases in PBM were more widespread, which can be attributed potentially to mercury transformation processes in the air or wood combustion rather than industrial sources.
dc.description.fosrcfull - en: Copyright [2017] American Meteorological Society (AMS). For permission to reuse any portion of this Work, please contact <a href = "mailto: permissions@ametsoc.org">permissions@ametsoc.org</a>. Any use of material in this Work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC § 108) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. All AMS journals and monograph publications are registered with the Copyright Clearance Center (<a href="https://www.copyright.com">https://www.copyright.com</a>). Additional details are provided in the AMS Copyright Policy statement, available on the AMS website (<a href="https://www.ametsoc.org/PUBSCopyrightPolicy">https://www.ametsoc.org/PUBSCopyrightPolicy</a>)
dc.description.fosrcfull-fosrctranslation - fr: Droit d'auteur [2017] American Meteorological Society (AMS). Pour obtenir l'autorisation de réutiliser toute partie de cette œuvre, veuillez contacter <a href = "mailto: permissions@ametsoc.org">permissions@ametsoc.org</a>. Toute utilisation d'un élément de cette œuvre considérée comme une "utilisation équitable" par l'article 107 de la loi américaine sur le droit d'auteur (U.S. Copyright Act, 17 U.S. Code § 107) ou satisfaisant aux conditions énoncées à l'article 108 de la loi américaine sur le droit d'auteur (U.S. Copyright Act, 17 U.S. Code § 108) ne requiert pas l'autorisation de l'AMS. La republication, la reproduction systématique, l'affichage sous forme électronique, par exemple sur un site web ou dans une base de données interrogeable, ou toute autre utilisation de ce matériel, à l'exception de ce qui est exempté par la déclaration ci-dessus, nécessite une autorisation écrite ou une licence de la part de l'AMS. Toutes les revues et monographies de l'AMS sont enregistrées auprès du Copyright Clearance Center (<a href="https://www.copyright.com">https://www.copyright.com</a>). Des détails supplémentaires sont prévu dans la déclaration de politique de droit d'auteur de l'AMS, disponible sur le site web de l'AMS (<a href="https://www.ametsoc.org/PUBSCopyrightPolicy">https://www.ametsoc.org/PUBSCopyrightPolicy</a>)
dc.identifier.doi: https://doi.org/10.1175/JAS-D-17-0086.1
dc.identifier.issn: 0022-4928; 1520-0469
dc.identifier.uri: https://open-science.canada.ca/handle/123456789/1339
dc.language.iso: en
dc.publisher: American Meteorological Society
dc.rights.openaccesslevel - en: Green
dc.rights.openaccesslevel - fr: Vert
dc.subject - en: Air; Nature and environment; Science and technology; Climate
dc.subject - fr: Air; Nature et environnement; Sciences et technologie; Climat
dc.subject.en - en: Air; Nature and environment; Science and technology; Climate
dc.subject.fr - fr: Air; Nature et environnement; Sciences et technologie; Climat
dc.title - en: Identifying Changes in Source Regions Impacting Speciated Atmospheric Mercury at a Rural Site in the Eastern United States
dc.type - en: Article
dc.type - fr: Article
local.article.journalissue: 9
local.article.journaltitle: Journal of the Atmospheric Sciences
local.article.journalvolume: 74
local.pagination: 2937–2947
local.peerreview - en: Yes
local.peerreview - fr: Oui
local.requestdoi: No

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