Lead contamination of subarctic lakes and its response to reduced atmospheric fallout: Can the recovery process be counteracted by the ongoing Climate change?

Klaminder Jonatan, Hammarlund Dan, Kokfelt Ulla, Jorien E. Vonk And, Bigler Christian

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Can a climate-triggered export of old contaminants from the soil alter the lead (Pb) contaminant burden of subarctic lakes? To address this question, we reconstructed the pollution history of three high latitude lakes situated in a region where a recent climatic shift has occurred. Dated sediment records were used as archives of past Pb inputs to the lakes, where the difference in the 206Pb/207Pb ratio between atmospheric contaminants ( 206Pb/207Pb ratio <1.16) and geogenic Pb in the catchment soil (206Pb/207Pb ratio > 1.22) were used to trace fluxes of Pb contaminants. Lead contaminants were found in sediments deposited since Roman times. A significant export of Pb from the soil contaminant pool is indicated in two of the lakes surrounded by near-shore permafrost soils. Here, levels of Pb contaminants and 206Pb/ 207Pb ratios of sediments deposited after the 1970s appear not to have been strongly affected by the ≥ 90% reduction in atmospheric deposition rates and increasing 206Pb/207Pb ratios of atmospheric Pb since the 1990s. We concluded that soil processes stimulated by the ongoing climate change at high latitudes might work counteractive to efforts to reduce contaminant levels in subarctic lakes.

Original languageEnglish
Pages (from-to)2335-2340
Number of pages6
JournalEnvironmental Science and Technology
Volume44
Issue number7
DOIs
Publication statusPublished - 1 Apr 2010

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Fallout
fallout
Climate change
Lakes
Contamination
Impurities
Recovery
climate change
pollutant
lake
Soils
Sediments
sediment
Permafrost
soil
Lead
lead contamination
Deposition rates
atmospheric deposition
permafrost

Cite this

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title = "Lead contamination of subarctic lakes and its response to reduced atmospheric fallout: Can the recovery process be counteracted by the ongoing Climate change?",
abstract = "Can a climate-triggered export of old contaminants from the soil alter the lead (Pb) contaminant burden of subarctic lakes? To address this question, we reconstructed the pollution history of three high latitude lakes situated in a region where a recent climatic shift has occurred. Dated sediment records were used as archives of past Pb inputs to the lakes, where the difference in the 206Pb/207Pb ratio between atmospheric contaminants ( 206Pb/207Pb ratio <1.16) and geogenic Pb in the catchment soil (206Pb/207Pb ratio > 1.22) were used to trace fluxes of Pb contaminants. Lead contaminants were found in sediments deposited since Roman times. A significant export of Pb from the soil contaminant pool is indicated in two of the lakes surrounded by near-shore permafrost soils. Here, levels of Pb contaminants and 206Pb/ 207Pb ratios of sediments deposited after the 1970s appear not to have been strongly affected by the ≥ 90{\%} reduction in atmospheric deposition rates and increasing 206Pb/207Pb ratios of atmospheric Pb since the 1990s. We concluded that soil processes stimulated by the ongoing climate change at high latitudes might work counteractive to efforts to reduce contaminant levels in subarctic lakes.",
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Lead contamination of subarctic lakes and its response to reduced atmospheric fallout : Can the recovery process be counteracted by the ongoing Climate change? / Jonatan, Klaminder; Dan, Hammarlund; Ulla, Kokfelt; Vonk And, Jorien E.; Christian, Bigler.

In: Environmental Science and Technology, Vol. 44, No. 7, 01.04.2010, p. 2335-2340.

Research output: Contribution to JournalArticleAcademicpeer-review

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