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Found 10 records similar to Historic mercury and heavy metal deposition in Flin Flon, Manitoba reconstructed from lake sediment cores

Federal

Kejimkujik National Park, in Nova Scotia, Canada, is a sensitive region for heavy metal contamination, such as mercury, in part due to long-range atmospheric deposition from global and regional industrial regions. The region is remote from industrial centres, but is downwind of major pollution sources in North America and Canada, and historically had numerous gold mining sites. The region has also experienced anthropogenic acidification from sulphate deposition over the 20th century, which has resulted in limnological conditions favourable for mercury (Hg) methylation within Kejimkujik lakes. Kejimkujik is therefore known to be a hotspot for methylmercury (MeHg) bioaccumulation and biomagnification, with the highest mercury concentrations detected within common loon (Gavia immer) populations across Canada and North America.

Last Updated: Jul. 23, 2021
Date Published: May 4, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Lake sediment cores, atmospheric deposition, heavy metals, Climate change, Historic trends, Climate Change and Air Pollutants (CCAP), Mercury, Biochemicals
Federal

The Experimental Lakes Area (ELA), in Ontario, Canada, is a sensitive region for heavy metal contamination, such as mercury, in part due to long-range atmospheric deposition from global and regional industrial regions. The region is remote from industrial centres, but is downwind of major pollution sources in North America and Canada, and historically had numerous gold mining sites. Supplemental Information

The Climate Change and Air Pollution (CCAP) program was established in 2016 to identify the severity and extent of adverse impacts of current and future air emissions on aquatic ecosystems to support regulatory actions and policy development. The program includes a number of components, including identifying, monitoring and defining air quality and greenhouse gas (GHG) concerns; improving our understanding of the short- and long-term effects of atmospheric pollutants on the environment; developing a plan to combat climate change; and monitoring and reducing both domestic and transboundary emissions of GHGs.

Last Updated: Jul. 29, 2021
Date Published: May 4, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Lake sediment cores, Atmospheric deposition, Heavy metals, Climate change, Historic trends, Climate Change and Air Pollutants (CCAP), Mercury, Contaminants, Biochemicals
Federal

Lake sediment cores were collected from several locations in Canada as part of the historic mercury and heavy metal deposition trend, analysis, and research component of the Clean Air Regulatory Agenda/Climate Change and Air Pollutant (CARA/CCAP) and Oil Sands Monitoring (OSM) programs. The reason sediment core analysis is used for research purposes is the bottom of a lake can act as a record of the contaminants and all other materials which have fallen into the lake over time. The lake water acts as both a sorting device and as a preservative since the deposits fall in chronological order and if not subject to dredging are not normally otherwise disturbed by humans. In areas where depositional histories are complex, including changing contributions from local, regional and global sources, multiple dated lake sediment cores are useful tools for examining response of not only aquatic ecosystems, but their surrounding landscapes through time to changing emission/deposition scenarios.

Last Updated: Feb. 21, 2022
Date Published: May 4, 2018
Organization: Environment and Climate Change Canada
Formats: HTML
Keywords:  Lake sediment cores, atmospheric deposition, heavy metals, Climate change, Historic trends, Climate Change and Air Pollutants (CCAP), Mercury, Environment, Biota
Federal

Recent and historical deposition of mercury (Hg) are examined over a broad geographic area from southwestern Northwest Territories to Labrador and from the U.S. Northeast to northern Ellesmere Island using dated sediment cores from 50 lakes (18 in midlatitudes (41-50 degrees North), 14 subarctic (51-64 degrees North) and 18 in the Arctic (65-83 degrees North)). Objectives were to quantify latitudinal and longitudinal trends of anthropogenic mercury deposition in eastern and northern North America, to investigate variations in mercury deposition, to examine relationships with lake area, catchment/lake area ratio and sedimentation rates, and to compare results with model predictions. Distinct increases of mercury over time were observed in 76% of Arctic, 86% of subarctic and 100% of midlatitude cores. Subsurface maxima in mercury depositional fluxes were observed in only 28% of midlatitude lakes and 18% of arctic lakes, indicating little recent reduction of inputs.

Last Updated: Feb. 21, 2022
Date Published: Apr. 30, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Northern Contaminants Program (NCP), Mercury, Contaminants, Sediment cores, Northern Ecosystem Initiative (NEI), Toxic Substances Research Initiative (TSRI), Arctic lakes, Subarctic lakes, Mid-latitude lakes
Federal

Measurements of gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM) and particulate bound mercury on PM2.5 (referred to as PBM2.5) were collected by Environment and Climate Change Canada from August to September 2013 at the Wood Buffalo Environmental Association (WBEA) Air Monitoring Station (AMS) 13 – Fort McKay South, and at WBEA AMS 4 – Buffalo Viewpoint. Monitoring resumed at WBEA AMS 13 in September 2014 with two speciated mercury instruments and is ongoing. One speciated mercury instrument monitors GEM, GOM, and PBM2.5; the second speciated mercury instrument monitors GEM, GOM, and mercury on PM10 (referred to as PBM10). These data are the first atmospheric speciated mercury measurements to be reported in the oil sands region.

Last Updated: Feb. 23, 2022
Date Published: Mar. 11, 2014
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Oil sands, Air quality, Ambient air, speciated atmospheric mercury, particle composition, particulate matter, PM composition, CAPMoN, active sampling
Federal

The Canadian Environmental Sustainability Indicators (CESI) program provides data and information to track Canada's performance on key environmental sustainability issues. The Emissions of harmful substances to air indicators track human-related emissions to air of 3 substances that are defined as toxic under the Canadian Environmental Protection Act, 1999: mercury, lead and cadmium and their compounds. For each substance, data are provided at the national, regional (provincial and territorial) and facility level and by source. Global emissions data are also provided for mercury.

Last Updated: Nov. 22, 2022
Date Published: Aug. 25, 2022
Organization: Environment and Climate Change Canada
Formats: WMS HTML ESRI REST CSV KMZ
Keywords:  Environmental indicators, Environment, Sustainable development, Air pollution, Toxic substances
Federal

Ambient concentrations of speciated mercury (Hg) have been measured at many locations across Canada. Mercury in the atmosphere is measured in three operationally-defined forms - gaseous elemental mercury (GEM), reactive gaseous mercury (RGM), and particulate-bound mercury (PBM). Under most conditions, GEM (or Hg0) is the predominant species in the air (~95-99%), while RGM and PBM concentrations are typically two orders of magnitude lower, i.e., <5% of the total atmospheric mercury concentration (Schroeder and Munthe, 1998). Reactive gaseous mercury is thought to consist of compounds such as HgCl2, HgBr2, Hg(OH)2 (Lin and Pehkonen, 1999), although the exact composition is unknown.

Last Updated: Dec. 11, 2019
Date Published: Aug. 10, 2016
Organization: Environment and Climate Change Canada
Formats: HTML CSV
Keywords:  Air, Air Quality, Atmospheric Monitoring, NAtChem, Networks and Studies, Speciated Mercury Monitoring, SMM, Hg
Federal

The Canadian Environmental Sustainability Indicators (CESI) program provides data and information to track Canada's performance on key environmental sustainability issues. The Emissions of harmful substances to air indicators track human-related emissions to air of 3 substances that are defined as toxic under the Canadian Environmental Protection Act, 1999: mercury, lead and cadmium and their compounds. For each substance, data are provided at the national, regional (provincial and territorial) and facility level and by source. Global emissions data are also provided for mercury.

Last Updated: Aug. 18, 2021
Date Published: May 30, 2019
Organization: Environment and Climate Change Canada
Formats: WMS HTML CSV ESRI REST KMZ
Keywords:  Facility, Substance, Air, Pollution and Waste, Toxic substances, Environmental indicators, Monitor / Assess Substance and Waste Levels in Air; Water; Soil; Biota, Assess Toxicity; Manage and Monitor for Environmental Presence of Hazardous Substances and Waste, National (CA)
Federal

Ambient concentrations of speciated mercury (Hg) have been measured at many locations across Canada. Mercury in the atmosphere is measured in three operationally-defined forms - gaseous elemental mercury (GEM), reactive gaseous mercury (RGM), and particulate-bound mercury (PBM). Under most conditions, GEM (or Hg0) is the predominant species in the air (~95-99%), while RGM and PBM concentrations are typically two orders of magnitude lower, i.e., <5% of the total atmospheric mercury concentration. Reactive gaseous mercury is thought to consist of compounds such as HgCl2, HgBr2, Hg(OH)2 although the exact composition is unknown.

Last Updated: Feb. 23, 2022
Date Published: Jan. 1, 2002
Organization: Environment and Climate Change Canada
Formats: PDF HTML
Keywords:  Air, Air Quality, Atmospheric Monitoring, NAtChem, Atmospheric Gases and Particles, Networks and Studies, SMM, Speciated Mercury, Hg
Federal

Measurements of gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM) and particulate bound mercury on PM2.5 (referred to as PBM) are currently collected by Environment and Climate Change Canada at a Wood Buffalo Environmental Association (WBEA) Air Monitoring Station (AMS). Preliminary, three-hour averaged speciated mercury data from the oil sands region are available for WBEA AMS 13 – Fort McKay South, located near Fort McKay, Alberta. There are no Environment and Climate Change Canada or Canadian Council of Ministers of the Environment (CCME) air quality guidelines, nor Alberta Ambient Air Quality Objectives for speciated Hg measurements. The monitoring follows the established Canadian Air and Precipitation Monitoring Network (CAPMoN) standard operating procedures.

Last Updated: Feb. 23, 2022
Date Published: Oct. 20, 2017
Organization: Environment and Climate Change Canada
Formats: HTML
Keywords:  Ambient air, speciated atmospheric mercury, particle composition, particulate matter, PM composition, CAPMoN, active sampling, oil sands, fine particulate matter
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