A Survey of Mercury in Air and Precipitation across Canada: Patterns and Trends
Atmospheric mercury (Hg) measurements from across Canada were compiled and analysed as part of a national Hg science assessment. Here we update long-term trends of Hg in air and precipitation, and present more extensive measurements on patterns and trends in speciated Hg species (gaseous elemental m...
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ftdoajarticles:oai:doaj.org/article:93c01caa3a51428a84b7a33deb483202 2023-05-15T15:08:58+02:00 A Survey of Mercury in Air and Precipitation across Canada: Patterns and Trends Amanda S. Cole Alexandra Steffen Chris S. Eckley Julie Narayan Martin Pilote Rob Tordon Jennifer A. Graydon Vincent L. St. Louis Xiaohong Xu Brian A. Branfireun 2014-09-01T00:00:00Z https://doi.org/10.3390/atmos5030635 https://doaj.org/article/93c01caa3a51428a84b7a33deb483202 EN eng MDPI AG http://www.mdpi.com/2073-4433/5/3/635 https://doaj.org/toc/2073-4433 2073-4433 doi:10.3390/atmos5030635 https://doaj.org/article/93c01caa3a51428a84b7a33deb483202 Atmosphere, Vol 5, Iss 3, Pp 635-668 (2014) elemental mercury total gaseous mercury reactive mercury gaseous oxidized mercury particulate mercury cycling of atmospheric mercury mercury in precipitation mercury trends Meteorology. Climatology QC851-999 article 2014 ftdoajarticles https://doi.org/10.3390/atmos5030635 2023-01-08T01:28:52Z Atmospheric mercury (Hg) measurements from across Canada were compiled and analysed as part of a national Hg science assessment. Here we update long-term trends of Hg in air and precipitation, and present more extensive measurements on patterns and trends in speciated Hg species (gaseous elemental mercury—GEM, reactive gaseous mercury—RGM, and total particulate mercury on particles <2.5 μm—TPM2.5) at several sites. A spatial analysis across Canada revealed higher air concentrations and wet deposition of Hg in the vicinity of local and regional emission sources, and lower air concentrations of Hg at mid-latitude maritime sites compared to continental sites. Diel and seasonal patterns in atmospheric GEM, RGM and TPM2.5 concentrations reflected differences in patterns of anthropogenic emissions, photo-induced surface emissions, chemistry, deposition and mixing. Concentrations of GEM decreased at rates ranging from −0.9% to −3.3% per year at all sites where measurements began in the 1990s. Concentrations of total Hg in precipitation declined up to 3.7% yr−1. Trends in RGM and TPM2.5 were less clear due to shorter measurement periods and low concentrations, however, in spring at the high Arctic site (Alert) when RGM and TPM2.5 concentrations were high, concentrations of both increased by 7%–10% per year. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Canada Atmosphere 5 3 635 668 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
elemental mercury total gaseous mercury reactive mercury gaseous oxidized mercury particulate mercury cycling of atmospheric mercury mercury in precipitation mercury trends Meteorology. Climatology QC851-999 |
spellingShingle |
elemental mercury total gaseous mercury reactive mercury gaseous oxidized mercury particulate mercury cycling of atmospheric mercury mercury in precipitation mercury trends Meteorology. Climatology QC851-999 Amanda S. Cole Alexandra Steffen Chris S. Eckley Julie Narayan Martin Pilote Rob Tordon Jennifer A. Graydon Vincent L. St. Louis Xiaohong Xu Brian A. Branfireun A Survey of Mercury in Air and Precipitation across Canada: Patterns and Trends |
topic_facet |
elemental mercury total gaseous mercury reactive mercury gaseous oxidized mercury particulate mercury cycling of atmospheric mercury mercury in precipitation mercury trends Meteorology. Climatology QC851-999 |
description |
Atmospheric mercury (Hg) measurements from across Canada were compiled and analysed as part of a national Hg science assessment. Here we update long-term trends of Hg in air and precipitation, and present more extensive measurements on patterns and trends in speciated Hg species (gaseous elemental mercury—GEM, reactive gaseous mercury—RGM, and total particulate mercury on particles <2.5 μm—TPM2.5) at several sites. A spatial analysis across Canada revealed higher air concentrations and wet deposition of Hg in the vicinity of local and regional emission sources, and lower air concentrations of Hg at mid-latitude maritime sites compared to continental sites. Diel and seasonal patterns in atmospheric GEM, RGM and TPM2.5 concentrations reflected differences in patterns of anthropogenic emissions, photo-induced surface emissions, chemistry, deposition and mixing. Concentrations of GEM decreased at rates ranging from −0.9% to −3.3% per year at all sites where measurements began in the 1990s. Concentrations of total Hg in precipitation declined up to 3.7% yr−1. Trends in RGM and TPM2.5 were less clear due to shorter measurement periods and low concentrations, however, in spring at the high Arctic site (Alert) when RGM and TPM2.5 concentrations were high, concentrations of both increased by 7%–10% per year. |
format |
Article in Journal/Newspaper |
author |
Amanda S. Cole Alexandra Steffen Chris S. Eckley Julie Narayan Martin Pilote Rob Tordon Jennifer A. Graydon Vincent L. St. Louis Xiaohong Xu Brian A. Branfireun |
author_facet |
Amanda S. Cole Alexandra Steffen Chris S. Eckley Julie Narayan Martin Pilote Rob Tordon Jennifer A. Graydon Vincent L. St. Louis Xiaohong Xu Brian A. Branfireun |
author_sort |
Amanda S. Cole |
title |
A Survey of Mercury in Air and Precipitation across Canada: Patterns and Trends |
title_short |
A Survey of Mercury in Air and Precipitation across Canada: Patterns and Trends |
title_full |
A Survey of Mercury in Air and Precipitation across Canada: Patterns and Trends |
title_fullStr |
A Survey of Mercury in Air and Precipitation across Canada: Patterns and Trends |
title_full_unstemmed |
A Survey of Mercury in Air and Precipitation across Canada: Patterns and Trends |
title_sort |
survey of mercury in air and precipitation across canada: patterns and trends |
publisher |
MDPI AG |
publishDate |
2014 |
url |
https://doi.org/10.3390/atmos5030635 https://doaj.org/article/93c01caa3a51428a84b7a33deb483202 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Atmosphere, Vol 5, Iss 3, Pp 635-668 (2014) |
op_relation |
http://www.mdpi.com/2073-4433/5/3/635 https://doaj.org/toc/2073-4433 2073-4433 doi:10.3390/atmos5030635 https://doaj.org/article/93c01caa3a51428a84b7a33deb483202 |
op_doi |
https://doi.org/10.3390/atmos5030635 |
container_title |
Atmosphere |
container_volume |
5 |
container_issue |
3 |
container_start_page |
635 |
op_container_end_page |
668 |
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1766340227871277056 |