Fluxes of Mercury to Lake Sediments in Central and Northern Canada Inferred from Dated Sediment Cores
Sediment cores were collected from lakes in central and northern Canada and from Hudson Bay to compare current and historic net depositions of mercury. Cores from most locations were enriched in mercury in the upper layers deposited recently relative to deeper, historic layers. The lakes with the gr...
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| Veröffentlicht in: | Biogeochemistry 1998-03, Vol.40 (2/3), p.163-173 |
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| container_title | Biogeochemistry |
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| creator | Lockhart, W. L. Wilkinson, P. Billeck, B. N. Danell, R. A. Hunt, R. V. Brunskill, G. J. Delaronde, J. St. Louis, V. |
| description | Sediment cores were collected from lakes in central and northern Canada and from Hudson Bay to compare current and historic net depositions of mercury. Cores from most locations were enriched in mercury in the upper layers deposited recently relative to deeper, historic layers. The lakes with the greatest enrichments in mercury were located in central/southern Canada. This enrichment was interpreted as being of anthropogenic origin. Mercury inputs at the Experimental Lakes Area (ELA) in northwestern Ontario inferred from a core profile agreed well with inputs calculated independently from precipitation and runoff data. Anthropogenic inputs of mercury to northwestern Ontario were calculated to be about 9 μ g m-2 y-1. Considering all the locations over the geographic range, the core profiles infer that fluxes of mercury have increased on average by about 2 fold over the past half century. This is consistent with results from other sites in North America and Europe. |
| doi_str_mv | 10.1023/A:1005923123637 |
| format | Article |
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L. ; Wilkinson, P. ; Billeck, B. N. ; Danell, R. A. ; Hunt, R. V. ; Brunskill, G. J. ; Delaronde, J. ; St. Louis, V.</creator><contributor>Rudd, JWM ; Gilmour, CC ; Bodaly, RA (eds)</contributor><creatorcontrib>Lockhart, W. L. ; Wilkinson, P. ; Billeck, B. N. ; Danell, R. A. ; Hunt, R. V. ; Brunskill, G. J. ; Delaronde, J. ; St. Louis, V. ; Rudd, JWM ; Gilmour, CC ; Bodaly, RA (eds)</creatorcontrib><description>Sediment cores were collected from lakes in central and northern Canada and from Hudson Bay to compare current and historic net depositions of mercury. Cores from most locations were enriched in mercury in the upper layers deposited recently relative to deeper, historic layers. The lakes with the greatest enrichments in mercury were located in central/southern Canada. This enrichment was interpreted as being of anthropogenic origin. Mercury inputs at the Experimental Lakes Area (ELA) in northwestern Ontario inferred from a core profile agreed well with inputs calculated independently from precipitation and runoff data. Anthropogenic inputs of mercury to northwestern Ontario were calculated to be about 9 μ g m-2 y-1. Considering all the locations over the geographic range, the core profiles infer that fluxes of mercury have increased on average by about 2 fold over the past half century. This is consistent with results from other sites in North America and Europe.</description><identifier>ISSN: 0168-2563</identifier><identifier>EISSN: 1573-515X</identifier><identifier>DOI: 10.1023/A:1005923123637</identifier><identifier>CODEN: BIOGEP</identifier><language>eng</language><publisher>Heidelberg: Kluwer Academic Publishers</publisher><subject>Anthropogenic factors ; Cores ; Earth sciences ; Earth, ocean, space ; Engineering and environment geology. 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Mercury inputs at the Experimental Lakes Area (ELA) in northwestern Ontario inferred from a core profile agreed well with inputs calculated independently from precipitation and runoff data. Anthropogenic inputs of mercury to northwestern Ontario were calculated to be about 9 μ g m-2 y-1. Considering all the locations over the geographic range, the core profiles infer that fluxes of mercury have increased on average by about 2 fold over the past half century. This is consistent with results from other sites in North America and Europe.</description><subject>Anthropogenic factors</subject><subject>Cores</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Engineering and environment geology. Geothermics</subject><subject>Exact sciences and technology</subject><subject>Freshwater</subject><subject>Geology</subject><subject>Hydrologic data</subject><subject>Isotope geochemistry</subject><subject>Isotope geochemistry. 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L.</au><au>Wilkinson, P.</au><au>Billeck, B. N.</au><au>Danell, R. A.</au><au>Hunt, R. V.</au><au>Brunskill, G. J.</au><au>Delaronde, J.</au><au>St. Louis, V.</au><au>Rudd, JWM</au><au>Gilmour, CC</au><au>Bodaly, RA (eds)</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fluxes of Mercury to Lake Sediments in Central and Northern Canada Inferred from Dated Sediment Cores</atitle><jtitle>Biogeochemistry</jtitle><date>1998-03-01</date><risdate>1998</risdate><volume>40</volume><issue>2/3</issue><spage>163</spage><epage>173</epage><pages>163-173</pages><issn>0168-2563</issn><eissn>1573-515X</eissn><coden>BIOGEP</coden><abstract>Sediment cores were collected from lakes in central and northern Canada and from Hudson Bay to compare current and historic net depositions of mercury. Cores from most locations were enriched in mercury in the upper layers deposited recently relative to deeper, historic layers. The lakes with the greatest enrichments in mercury were located in central/southern Canada. This enrichment was interpreted as being of anthropogenic origin. Mercury inputs at the Experimental Lakes Area (ELA) in northwestern Ontario inferred from a core profile agreed well with inputs calculated independently from precipitation and runoff data. Anthropogenic inputs of mercury to northwestern Ontario were calculated to be about 9 μ g m-2 y-1. Considering all the locations over the geographic range, the core profiles infer that fluxes of mercury have increased on average by about 2 fold over the past half century. This is consistent with results from other sites in North America and Europe.</abstract><cop>Heidelberg</cop><pub>Kluwer Academic Publishers</pub><doi>10.1023/A:1005923123637</doi><tpages>11</tpages></addata></record> |
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| ispartof | Biogeochemistry, 1998-03, Vol.40 (2/3), p.163-173 |
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| source | Jstor Complete Legacy; SpringerLink Journals - AutoHoldings |
| subjects | Anthropogenic factors Cores Earth sciences Earth, ocean, space Engineering and environment geology. Geothermics Exact sciences and technology Freshwater Geology Hydrologic data Isotope geochemistry Isotope geochemistry. Geochronology Lake sediment cores Lake sediments Lakes Limnology Mercury Pollution, environment geology Sediment core samples Sediment deposition Sediments Trout Watersheds |
| title | Fluxes of Mercury to Lake Sediments in Central and Northern Canada Inferred from Dated Sediment Cores |
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