A reconstruction of the thawing of the permafrost during the last 170years on the Taimyr Peninsula (East Siberia, Russia)

Fedotov, Andrey; Phedorin, M.A.; Enushchenko, I. V.; Vershinin, K. E.; Melgunov, M. S.; Ходжер, Т. В.

doi:10.1016/j.gloplacha.2012.09.002

Cited by 22 publications

(4 citation statements)

References 88 publications

(103 reference statements)

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“…1) to effectively represent sedimentological variability exhibited at Ilirney. The significant correlation between Br and organic productivity proxies affirms Br as a highresolution proxy of organic productivity in lacustrine sediments Quaternary Science Reviews 247 (2020) 106607 (Biskaborn et al, 2013;Fedotov et al, 2012;Flood et al, 2016;Heinecke et al, 2017;Kalugin et al, 2007;Ziegler et al, 2008). Zr is related to the minerogenic input of resistant minerals deposited alongside coarse silt and sand (Cuven et al, 2010;Marshall et al, 2011).…”

Section: Reliability Of Xrf-derived Sediment Geochemical Proxiesmentioning

confidence: 64%

Geochemical and sedimentological responses of Arctic glacial Lake Ilirney, Chukotka (Far East Russia) to palaeoenvironmental change since ~ 51.8 ka BP

Vyse

Herzschuh

Andreev

et al. 2021

Preprint

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<p>Palaeoenvironmental reconstructions with temporal coverages extending beyond Marine Isotope Stage (MIS) three are scarce within the data sparse region of Chukotka, Far East Russia. The objective of this work was to infer palaeoenvironmental variability from a 10.76 m long, radiocarbon and OSL dated sediment core from Lake Ilirney, Chukotka (67&#176;21&#180;N, 168&#176;19&#180;E). We performed acoustic sub-bottom profiling of the lake basin and analysed high-resolution elements (XRF), organic carbon (TC, TN, TOC), grain-size, mineralogy (XRD) and partly also diatoms and pollen from the core. Our results affirm the application of XRF-based sediment-geochemical proxies as effective tracers of palaeoenvironmental variability within arctic lake systems. Our work reveals that a lake formed during MIS 3 from ca. 51.8 ka BP, following an extensive MIS 4 glaciation in the Ilirney valley. Catchment palaeoenvironmental conditions during this time likely remained cold associated with the continued presence of a catchment glacier until ca. 36.2 ka BP. Partial amelioration reflected by increased diatom, catchment vegetation and lake organic productivity and clastic sediment input from mixed sources from ca. 36.2 ka BP potentially resulted in a lake high-stand ~15 m above the present level and may represent evidence of a more productive palaeoenvironment overlapping in timing with the MIS 3 interstadial optimum. A transitional period of deteriorating palaeoenvironmental conditions occurred ca. 30- 27.9 ka BP and was superseded by periglacial-glacial conditions from ca. 27.9 ka BP, during MIS 2. Deglaciation as marked by sediment-geochemical proxies commenced ca. 20.2 ka BP. Our findings are compared with lacustrine, Yedoma and river-bluff records from across Beringia and potentially yield limited support for a marked Younger Dryas cooling in the study area.</p>

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Section: Reliability Of Xrf-derived Sediment Geochemical Proxiesmentioning

confidence: 64%

Geochemical and sedimentological responses of Arctic glacial Lake Ilirney, Chukotka (Far East Russia) to palaeoenvironmental change since ~ 51.8 ka BP

Vyse

Herzschuh

Andreev

et al. 2021

Preprint

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“…For instance, significant periods of increased permafrost thawing occurred in West and East Siberia between 1900and 1938(Agafonov et al 2004Fedotov et al 2012b).…”

Section: Summer Air Temperature Reconstructionmentioning

confidence: 99%

A 850-year record climate and vegetation changes in East Siberia (Russia), inferred from geochemical and biological proxies of lake sediments

et al. 2014

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East Siberia is very sensitive to moisture regimes because it is located in a margin area, where moisture from the North Atlantic is strongly depleted, and the penetration of the East Asian monsoon is weak and rare. In winter months, the Siberian anticyclone strongly blocks and reduces the external influences on the region. The high latitude of the study area at 52°N is probably sensitive to variation in insolation and solar activity. We analysed a 42-cm-long sediment record from Lake Mountain located in East Siberia (Russia) for geochemical, mineralogical, subfossil diatoms, chironomids, and pollen to provide a reconstruction of the climate history of the area for the last 850 years. According to our reconstruction, a clear decrease in summer temperatures occurred in East Siberia after ca. 1400 and we linked this temperature drop with the beginning of the Little Ice Age. The coldest summer occurred about ca. 1570-1700 and 1830-1900. We assumed that the most significant changes of the lake bio-productivity and the catchment area were occurred about ca.

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“…Larch forests growing in these regions are highly sensitive to climatic changes due to severe environmental conditions 1 – 3 . Recent rapid changes in the hydrological and temperature regimes affect significantly permafrost degradation 4 accelerating carbon release, increase frequency of drought events and extensive wildfires expanded over a large territory in Siberia 5 – 8 . However, the mechanisms leading to drought events in the permafrost region with available thawed water for Siberian forests remain unknown.…”

Section: Introductionmentioning

confidence: 99%

Spring arctic oscillation as a trigger of summer drought in Siberian subarctic over the past 1494 years

Сидорова

Siegwolf

Fonti

et al. 2021

Sci Rep

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Rapid changes in the hydrological and temperature regimes over the past decades at the northern latitudes enhance significantly permafrost degradation accelerating carbon release, increase the frequency of drought events and extensive wildfires. However, the mechanisms and dynamics driving drought events and their influence on Siberian forests are currently the subject of numerous research activities. Newly developed and annually resolved stable carbon and oxygen isotope chronologies of larch tree-ring cellulose (δ13Ccell and δ18Ocell) for the period 516–2009 CE allowed the reconstruction of July precipitation and Arctic Oscillation (AO) in May, respectively. Unprecedented drought events occurred towards twentieth–twenty-first centuries as indicated by the July precipitation reconstruction. Positive AO phases in May were most pronounced during the second part of the first millennium, but also increased in frequency in the modern period of the twentieth–twenty-first centuries. Negative AO phases are associated with cold anomalies and show a remarkable decrease in the nineteenth century caused by a series of major volcanic eruptions. Our findings help explaining the increased frequency of Siberian forest fires over the past decades in Central Siberia consistent with a reduction of summer precipitation, triggered by a positive phase of the Arctic Oscillation in May.

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A reconstruction of the thawing of the permafrost during the last 170years on the Taimyr Peninsula (East Siberia, Russia)

Cited by 22 publications

References 88 publications

Geochemical and sedimentological responses of Arctic glacial Lake Ilirney, Chukotka (Far East Russia) to palaeoenvironmental change since ~ 51.8 ka BP

Geochemical and sedimentological responses of Arctic glacial Lake Ilirney, Chukotka (Far East Russia) to palaeoenvironmental change since ~ 51.8 ka BP

A 850-year record climate and vegetation changes in East Siberia (Russia), inferred from geochemical and biological proxies of lake sediments

Spring arctic oscillation as a trigger of summer drought in Siberian subarctic over the past 1494 years

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