The isotopic evolution of atmospheric Pb in central Ontario since AD 1800, and its impacts on the soils, waters, and sediments of a forested watershed, Kawagama Lake

Shotyk, William; Krachler, Michael

doi:10.1016/j.gca.2010.01.009

Cited by 34 publications

(36 citation statements)

References 152 publications

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“…A Pb isotope profile for an ombrotrophic peat bog ~60 km northeast of Solitaire Lake in Algonquin Park exhibits a similar profile to Solitaire Lake, with the date of the earliest 206 Pb/ 207 Pb peak offset by ~40 years (Figure 22) (Shotyk and Krachler, 2010). The…”

Section: Solitaire Lakementioning

confidence: 84%

“…The authors conclude that the declining 206 Pb/ 207 Pb towards the surface may be due to emissions from the Rouyn Noranda smelter in Quebec (Shotyk and Krachler, 2010). The Rouyn Noranda smelter historically mined very old local ores with 206 Pb/ 207 Pb around 0.94 (Franklin et al, 1983).…”

mentioning

confidence: 98%

“…The Algonquin Park ombrotrophic peat bog also appears to be lacking the UMV isotopic marker based on the Bermuda coral-dated timing of the marker, but contains a peak in 206 Pb/ 207 Pb at ~1920 ( Figure 22B) (Shotyk and Krachler, 2010). However, as Section 4.1.3 outlined, the dating of this peat core may be inaccurate.…”

mentioning

confidence: 99%

“…Pb/ 207 Pb and Pb concentration for Solitaire Lake compared to an Algonquin Park peat bog (Shotyk and Krachler, 2010) 102…”

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confidence: 99%

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Lead isotopes as particulate contaminant tracers and chronostratigraphic markers in lake sediments in northeastern North America

et al. 2018

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Section: Solitaire Lakementioning

confidence: 84%

mentioning

confidence: 98%

mentioning

confidence: 99%

“…Pb/ 207 Pb and Pb concentration for Solitaire Lake compared to an Algonquin Park peat bog (Shotyk and Krachler, 2010) 102…”

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Lead isotopes as particulate contaminant tracers and chronostratigraphic markers in lake sediments in northeastern North America

et al. 2018

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“…Enrichment has also been demonstrated in soil (Brännvall et al, 2001;Klaminder et al, 2006) and lake sediments (Brännvall et al, 1999;Stromsoe et al, 2013;Wong et al, 1984;Yang et al, 2007) although these records maybe more complex due to the influence of catchment and in situ soil processes (e.g. Augustsson et al, 2010;Shotyk and Krachler, 2010). Over the last 20 years, an increasing body of literature has documented metal enrichment in such settings (peat mires and ice) where, in many cases, temporal patterns in metal enrichment directly reflect regional industrial histories (e.g.…”

Section: Introductionmentioning

confidence: 99%

A landscape-scale approach to examining the fate of atmospherically derived industrial metals in the surficial environment

Stromsoe

Marx

McGowan

et al. 2015

Science of The Total Environment

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Industrial metals are now ubiquitous within the atmosphere and their deposition represents a potential source of contamination to surficial environments. Few studies, however, have examined the environmental fate of atmospheric industrial metals within different surface environments. In this study, patterns of accumulation of atmospherically transported industrial metals were investigated within the surface environments of the Snowy Mountains, Australia. Metals, including Pb, Sb, Cr and Mo, were enriched in aerosols collected in the Snowy Mountains by 3.5-50 times pre-industrial concentrations. In sedimentary environments (soils, lakes and reservoirs) metals showed varying degrees of enrichment. Differences were attributed to the relative degree of atmospheric input, metal sensitivity to enrichment, catchment area and metal behaviour following deposition. In settings where atmospheric deposition dominated (ombrotrophic peat mires in the upper parts of catchments), metal enrichment patterns most closely resembled those in collected aerosols. However, even in these environments significant dilution (by 5-7 times) occurred. The most sensitive industrial metals (those with the lowest natural concentration; Cd, Ag, Sb and Mo) were enriched throughout the studied environments. However, in alpine tarn-lakes no other metals were enriched, due to the dilution of pollutantmetals by catchment derived sediment. In reservoirs, which were located lower within catchments, industrial metals exhibited more complex patterns. Particle reactive metals (e.g. Pb) displayed little enrichment, implying that they were retained up catchment, whereas more soluble metals (e.g., Cu and Zn) showed evidence of concentration. These same metals (Cu and Zn) were depleted in soils, implying that they are preferentially transported through catchments. Enrichment of other metals (e.g. Cd) varied between reservoirs as a function of contributing catchment area. Overall this study showed that the fate of atmospherically derived metals is complex, and depends upon metal behaviour and geomorphic processes operating at landscape scales. Disciplines Medicine and Health Sciences | Social and Behavioral Sciences Publication DetailsStromsoe, N., Marx, S. K., McGowan, H. A., Callow, N., Heijnis, H. & Zawadzki, A. (2015). A landscape-scale approach to examining the fate of atmospherically derived industrial metals in the surficial environment. However, in alpine tarn-lakes no other metals were enriched, due to the dilution of pollutantmetals by catchment derived sediment. In reservoirs, which were located lower within catchments, industrial metals exhibited more complex patterns. Particle reactive metals (e.g. Pb) displayed little enrichment, implying they were retained up catchment, whereas more soluble metals (e.g., Cu and Zn) showed evidence of concentration. These same metals (Cu and Zn) were depleted in soils, implying they are preferentially transported through catchments. Enrichment of other metals (e.g. Cd) varied between reservoirs as a funct...

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Peat bogs in northern Alberta, Canada reveal decades of declining atmospheric Pb contamination

Shotyk

Appleby

Bicalho

et al. 2016

Geophysical Research Letters

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Peat cores were collected from six bogs in northern Alberta to reconstruct changes in the atmospheric deposition of Pb, a valuable tracer of human activities. In each profile, the maximum Pb enrichment is found well below the surface. Radiometric age dating using three independent approaches (14C measurements of plant macrofossils combined with the atmospheric bomb pulse curve, plus 210Pb confirmed using the fallout radionuclides 137Cs and 241Am) showed that Pb contamination has been in decline for decades. Today, the surface layers of these bogs are comparable in composition to the “cleanest” peat samples ever found in the Northern Hemisphere, from a Swiss bog ~ 6000 to 9000 years old. The lack of contemporary Pb contamination in the Alberta bogs is testimony to successful international efforts of the past decades to reduce anthropogenic emissions of this potentially toxic metal to the atmosphere.

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The isotopic evolution of atmospheric Pb in central Ontario since AD 1800, and its impacts on the soils, waters, and sediments of a forested watershed, Kawagama Lake

Cited by 34 publications

References 152 publications

Lead isotopes as particulate contaminant tracers and chronostratigraphic markers in lake sediments in northeastern North America

Lead isotopes as particulate contaminant tracers and chronostratigraphic markers in lake sediments in northeastern North America

A landscape-scale approach to examining the fate of atmospherically derived industrial metals in the surficial environment

Peat bogs in northern Alberta, Canada reveal decades of declining atmospheric Pb contamination

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