Реконструкция Условий Формирования Торфяной Залежи Низинного Болота На Юге Таежной Зоны Западной Сибири

Kurina, Irina V.; Veretennikova, Elena E.; Ильина, Анна Александровна; Дюкарев, Е. А.; Головацкая, Е. А.; Смирнов, С. В.

doi:10.1134/s2587556618040106

Cited by 2 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For 4.5 kyr, the rate of peat formation and bog extension in the permafrostaffected part of the WSL has been decreasing. In the southern part of the cryolithozone and permafrost-free part of the WSL, peat accumulation and bog extension remained active over the entire Holocene (Kurina and Veretennikova, 2015;Preis and Karpenko, 2015;Kurina et al, 2018). The main mineral substrates underlying frozen peat layers of the WSL are quaternary clays, sands, and alevrolites.…”

Section: Sampling Sitesmentioning

confidence: 99%

“…Permafrost thawing has been shown to enhance river Hg export from soils to rivers (St. Pierre et al, 2019). It is most pronounced in the discontinuous-permafrost zone due to thawing of fresh soil organic matter and maximal active layer depth and has been suggested to potentially double over the next 50 years (Lim et al, 2019). The quantity of atmospheric Hg deposition to northern peat soils that is presently re-emitted to the atmosphere is not well understood.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A revised pan-Arctic permafrost soil Hg pool based on Western Siberian peat Hg and carbon observations

et al. 2020

View full text Add to dashboard Cite

Abstract. Natural and anthropogenic mercury (Hg) emissions are sequestered in terrestrial soils over short, annual to long, millennial timescales before Hg mobilization and run-off impact wetland and coastal ocean ecosystems. Recent studies have used Hg-to-carbon (C) ratios (RHgC's) measured in Alaskan permafrost mineral and peat soils together with a northern circumpolar permafrost soil carbon inventory to estimate that these soils contain large amounts of Hg (between 184 and 755 Gg) in the upper 1 m. However, measurements of RHgC on Siberian permafrost peatlands are largely missing, leaving the size of the estimated northern soil Hg budget and its fate under Arctic warming scenarios uncertain. Here we present Hg and carbon data for six peat cores down to mineral horizons at 1.5–4 m depth, across a 1700 km latitudinal (56 to 67∘ N) permafrost gradient in the Western Siberian Lowland (WSL). Mercury concentrations increase from south to north in all soil horizons, reflecting a higher stability of sequestered Hg with respect to re-emission. The RHgC in the WSL peat horizons decreases with depth, from 0.38 Gg Pg−1 in the active layer to 0.23 Gg Pg−1 in continuously frozen peat of the WSL. We estimate the Hg pool (0–1 m) in the permafrost-affected part of the WSL peatlands to be 9.3±2.7 Gg. We review and estimate pan-Arctic organic and mineral soil RHgC to be 0.19 and 0.63 Gg Pg−1, respectively, and use a soil carbon budget to revise the pan-Arctic permafrost soil Hg pool to be 72 Gg (39–91 Gg; interquartile range, IQR) in the upper 30 cm, 240 Gg (110–336 Gg) in the upper 1 m, and 597 Gg (384–750 Gg) in the upper 3 m. Using the same RHgC approach, we revise the upper 30 cm of the global soil Hg pool to contain 1086 Gg of Hg (852–1265 Gg, IQR), of which 7 % (72 Gg) resides in northern permafrost soils. Additional soil and river studies in eastern and northern Siberia are needed to lower the uncertainty on these estimates and assess the timing of Hg release to the atmosphere and rivers.

show abstract

Section: Sampling Sitesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A revised pan-Arctic permafrost soil Hg pool based on Western Siberian peat Hg and carbon observations

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Since 4.5 ky, the rate of peat formation and bog extension in the permafrost-affected part of the WSL have decreased. In the southern part of cryolithozone and permafrost-free part of WSL, peat accumulation and bog extension remained active over the entire Holocene (Kurina and Veretennikova, 2015;Preis and Karpenko, 2015;Kurina et al, 2018). The main mineral substrates underlying frozen peat layers of the WSL are quaternary clays, sands, and alevrolites.…”

Section: 1sampling Sitesmentioning

confidence: 99%

“…Analyses of total C before and after sample treatment with HCl did not yield more than 1 % of inorganic C; therefore our total C-determination represents organic carbon. For trace and major element analysis, soil samples were subjected to full acid digestion in the clean room following ICP-MS (Agilent 7500 ce) analyses as described previously (Morgalev et al, 2017).…”

Section: Sampling Procedure Analyses and Data Treatmentmentioning

confidence: 99%

“…Whilst the stock of C in Arctic and subarctic peat and mineral soils is fairly well quantified (472 Pg C (27 Pg, 95% confidence interval, CI) in the upper 0-1m (Hugelius et al 2014), this is not true for pollutants such as mercury (Hg). Because of its strong bio-amplification in Arctic marine biota (Morel et al, 1998), and exposure to native Arctic populations (AMAP, 2011), there is a strong interest in understanding Hg biogeochemistry in Arctic environments (Outridge et al, 2008;Steffen et al, 2008;Stern et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A revised northern soil Hg pool, based on western Siberia permafrost peat Hg and carbon observations

Lim

Jiskra

Sonke

et al. 2020

Preprint

View full text Add to dashboard Cite

Abstract. Natural and anthropogenic mercury (Hg) emissions are sequestered in terrestrial soils over short, annual, to long, millennial time scales, before Hg mobilization and run-off impacts wetland and coastal Ocean ecosystems. Recent studies have used Hg to carbon (C) ratios, RHgC, measured in Alaskan permafrost mineral and peat soils, together with a northern soil carbon inventory, to estimate that these soils contain large amounts, 184 to 755 Gg of Hg in the upper 1 m. However, measurements of RHgC on Siberian permafrost peatlands are largely missing, leaving the size of estimated northern soil Hg budget, and its fate under arctic warming scenarios uncertain. Here we present Hg and carbon data for 6 peat cores, down to mineral horizons at 1.5–4 m depth, across a 1700 km latitudinal (56 to 67° N) permafrost gradient in the Western Siberian lowlands (WSL). Hg concentrations increase from south to north in all soil horizons, reflecting enhanced net accumulation of atmospheric gaseous Hg by the vegetation Hg pump. The RHgC in WSL peat horizons decreases with depth from 0.38 Gg Pg−1 in the active layer to 0.23 Gg Pg−1 in continuously frozen peat of the WSL. We estimate the Hg pool (0 1 m) in the permafrost-affected part of WSL peatlands to be 9.3 ± 2.7 Gg. We review and estimate pan-arctic organic and mineral soil RHgC to be 0.19 and 0.77 Gg Pg−1, and use a soil carbon budget to revise the northern soil Hg pool to be 67 Gg (37–88 Gg, interquartile range (IQR)) in the upper 30 cm, 225 Gg (102–320 Gg) in the upper 1 m, and 557 Gg (371–699 Gg) in the upper 3 m. Using the same RHgC approach, we revise the global upper 30 cm soil Hg pool to contain 1078 Gg of Hg (842–1254 Gg, IQR), of which 6 % (67 Gg) resides in northern permafrost soils. Additional soil and river studies must be performed in Eastern and Northern Siberia to lower the uncertainty on these estimates, and assess the timing of Hg release to atmosphere and rivers.

show abstract

Реконструкция Условий Формирования Торфяной Залежи Низинного Болота На Юге Таежной Зоны Западной Сибири

Cited by 2 publications

References 0 publications

A revised pan-Arctic permafrost soil Hg pool based on Western Siberian peat Hg and carbon observations

A revised pan-Arctic permafrost soil Hg pool based on Western Siberian peat Hg and carbon observations

A revised northern soil Hg pool, based on western Siberia permafrost peat Hg and carbon observations

Contact Info

Product

Resources

About