Deciphering human–climate interactions in an ombrotrophic peat record: REE, Nd and Pb isotope signatures of dust supplies over the last 2500years (Misten bog, Belgium)

Fagel, Nathalie; Allan, Mohammed; Roux, Gaël Le; Mattielli, Nadine; Piotrowska, Natalia; Sikorski, Jarosław

doi:10.1016/j.gca.2014.03.014

Cited by 18 publications

(18 citation statements)

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“…In core MIS, 2 cm interval corresponds to 20 years. For the core MIS, the Pb isotopic data for the Roman period are from Fagel et al [61].…”

Section: Data From Previous Researchmentioning

confidence: 99%

“…The Pb isotopic ratios of this study show that the Clefaye and Misten peats are influenced by a mixture of local and regional anthropogenic sources. Roman mining and metallurgical activities all over NW-SW Europe and around the Mediterranean Sea increased significantly the amount of atmospheric Pb [5,15,20,61,70]. The Pb isotope ratios deposited in CLE and MIS peat cores vary from 1.729 to 1.178 for 206 Pb/ 207 Pb ratios and from 2.086 to 2.089 for 208 Pb/ 206 Pb ratios ( Figure 5A).…”

Section: Identification Of Pb Sourcesmentioning

confidence: 99%

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Reconstruction of Atmospheric Lead Pollution During the Roman Period Recorded in Belgian Ombrotrophic Peatlands Cores

et al. 2018

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Two peat cores from two bogs were used to record changes in the atmospheric Pb accumulation rate (Pb AR) in Belgium during the Roman period. The two records were compared to assess the reliability of peat cores as archives of atmospheric Pb deposition and to establish histories of atmospheric emissions from anthropogenic sources. To address these issues we analyzed Pb concentration and its isotopes, using ICP-MS, LA-ICP-MS and MC-ICP-MS in two peat sections, spanning 1000 years each. Lead concentrations in the two cores range from 0.1 to 60 µg g −1 , with the maxima between 15 and 60 µg g −1. The average natural background of Pb AR varies between 0.003 and 0.07 mg m −2 yr −1 and the maximum ranges from 0.7 to 1.2 mg m −2 yr −1 between 50 BC and AD 215. The highest Pb AR exceed the pre-Roman period values by a factor of 17-80. Pb isotopic composition indicates that mining and metallurgical activities were the predominant sources of pollution during the Roman period. The Pb AR and chronologies in the Belgian peat cores are consistent with those reported for other continental archives such as lake sediments, peat and ice cores.

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“…In core MIS, 2 cm interval corresponds to 20 years. For the core MIS, the Pb isotopic data for the Roman period are from Fagel et al [61].…”

Section: Data From Previous Researchmentioning

confidence: 99%

Section: Identification Of Pb Sourcesmentioning

confidence: 99%

Reconstruction of Atmospheric Lead Pollution During the Roman Period Recorded in Belgian Ombrotrophic Peatlands Cores

et al. 2018

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“…The chronology of these changes fits with known socio-cultural periods, such as the Neolithic, Bronze Age, Iron Age, Roman period, Late Antiquity and the Middle Ages, as found for NW Spain in previous studies (López-Merino et al, 2010, 2014; Martínez Cortizas et al, 2005; Mighall et al, 2006; Muñoz Sobrino et al, 2001, 2005). Research elsewhere in Europe also pointed to climate and regional human activities as triggers for dust deposition in bogs (Fagel et al, 2014; Longman et al, 2017). In the Swiss Alps, for example, increasing human influence on erosion was found to have occurred since the middle Bronze Age, affecting soil dynamics and hydrological patterns and leading to an increase in floods (Arnaud et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Holocene atmospheric dust deposition in NW Spain

et al. 2019

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Atmospheric dust plays an important role in terrestrial and marine ecosystems, particularly those that are nutrient limited. Despite that most dust originates from arid and semi-arid regions, recent research has shown that past dust events may have been involved in boosting productivity in nutrient-poor peatlands. We investigated dust deposition in a mid-latitude, raised bog, which is surrounded by a complex geology (paragneiss/schist, granite, quartzite and granodiorite). As proxies for dust fluxes, we used accumulation rates of trace (Ti, Zr, Rb, Sr and Y) as well as major (K and Ca) lithogenic elements. The oldest, largest dust deposition event occurred between ~8.6 and ~7.4 ka BP, peaking at ~8.1 ka BP (most probably the 8.2 ka BP event). The event had a large impact on the evolution of the mire, which subsequently transitioned from a fen into a raised bog in ~1500 years. From ~6.7 to ~4.0 ka BP, fluxes were very low, coeval with mid-Holocene forest stability and maximum extent. In the late Holocene, after ~4.0 ka BP, dust events became more prevalent with relatively major deposition at ~3.2–2.5, ~1.4 ka BP and ~0.35–0.05 ka BP, and minor peaks at ~4.0–3.7, ~1.7, ~1.10–0.95 ka BP and ~0.74–0.58 ka BP. Strontium fluxes display a similar pattern between ~11 and ~6.7 ka BP but then became decoupled from the other elements from the mid Holocene onwards. This seems to be a specific signal of the granodiorite batholith, which has an Sr anomaly. The reconstructed variations in dust fluxes bear a strong climatic imprint, probably related to storminess controlled by North Atlantic Oscillation conditions. Complex interactions also arise because of increased pressure from human activities.

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“…Element accumulation rates (g cm −2 y −1 ) were calculated according to the formula: element concentration* bulk density* peat accumulation rate. Dust flux (g m −2 y −1 ) was calculated according to the formula: (element concentration (Sc, Ti)/concentration of element in Upper Continental Crust)* bulk density *peat accumulation rate*1000049. Results are detailed in Supplementary Table 1.…”

Section: Methodsmentioning

confidence: 99%

Anthropogenic- and natural sources of dust in peatland during the Anthropocene

Fiałkiewicz-Kozieł

Smieja-Król

Frontasyeva

et al. 2016

Sci Rep

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As human impact have been increasing strongly over the last decades, it is crucial to distinguish human-induced dust sources from natural ones in order to define the boundary of a newly proposed epoch - the Anthropocene. Here, we track anthropogenic signatures and natural geochemical anomalies in the Mukhrino peatland, Western Siberia. Human activity was recorded there from cal AD 1958 (±6). Anthropogenic spheroidal aluminosilicates clearly identify the beginning of industrial development and are proposed as a new indicator of the Anthropocene. In cal AD 1963 (±5), greatly elevated dust deposition and an increase in REE serve to show that the geochemistry of elements in the peat can be evidence of nuclear weapon testing; such constituted an enormous force blowing soil dust into the atmosphere. Among the natural dust sources, minor signals of dryness and of the Tunguska cosmic body (TCB) impact were noted. The TCB impact was indirectly confirmed by an unusual occurrence of mullite in the peat.

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Deciphering human–climate interactions in an ombrotrophic peat record: REE, Nd and Pb isotope signatures of dust supplies over the last 2500years (Misten bog, Belgium)

Cited by 18 publications

References 93 publications

Reconstruction of Atmospheric Lead Pollution During the Roman Period Recorded in Belgian Ombrotrophic Peatlands Cores

Reconstruction of Atmospheric Lead Pollution During the Roman Period Recorded in Belgian Ombrotrophic Peatlands Cores

Holocene atmospheric dust deposition in NW Spain

Anthropogenic- and natural sources of dust in peatland during the Anthropocene

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