Palaeoclimate signals as inferred from stable-isotope composition of ground ice in the Verkhoyansk foreland, Central Yakutia

Popp, Steffen; Diekmann, Bernhard; Meyer, Hanno; Siegert, Christine; Syromyatnikov, I.; Hubberten, Hans‐Wolfgang

doi:10.1002/ppp.556

Cited by 54 publications

(43 citation statements)

References 24 publications

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“…We assume that the landscape dynamics of the Lena catchment probably exerted a very large influence on changes in the hydrological regime in our study region. The late Pleistocene glaciation of the Verkhoyansky Mountains was expressed by several strong mountain glacier advances during the early Weichselian (MIS 4) period, and minor advances during the Middle and Late Weichselian (Arkhipov et al, 1986;Kind, 1975;Kolpakov, 1979;Popp et al, 2006;Stauch and Gualtieri, 2008;Stauch and Lehmkuhl, 2010;Stauch et al, 2007). These glacier dynamics, as well as paleoprecipitation patterns in the large Lena catchment, likely also controlled the dynamics of the Lena River in its lower reaches.…”

Section: Discussion and Interpretationmentioning

confidence: 99%

Late Quaternary paleoenvironmental records from the western Lena Delta, Arctic Siberia

Schirrmeister

Grosse

Schnelle

et al. 2011

Palaeogeography, Palaeoclimatology, Palaeoecology

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The three main Lena Delta terraces were formed during different stages of the late Quaternary. While only the first floodplain terrace is connected with active deltaic processes, the second and third terraces, which dominate the western part of the delta, are erosional remnants of arctic paleolandscapes affected by periglacial processes. The landscape dynamics of the second and the third terraces, and their relationship to each other, are of particular importance in any effort to elucidate the late Quaternary paleoenvironment of western Beringia. Multidisciplinary studies of permafrost deposits on the second terrace were carried out at several sites of the Arga Complex, named after the largest delta island, Arga-Muora-Sise. The frozen sediments predominantly consist of fluvial sands several tens of meters thick, radiocarbon-dated from N 52 to 16 kyr BP. These sands were deposited under changing fluvial conditions in a dynamic system of shifting river channels, and have been additionally modified by synsedimentary and postsedimentary cryogenesis. Later thermokarst processes affected this late Pleistocene fluvial landscape during the Lateglacial and the Holocene. In addition, eolian activity reworked the fluvial sands on exposed surfaces at least since the Lateglacial, resulting in dune formation in some areas. Contrary to the Arga Complex, the third terrace is mainly composed of polygenetic alluvial and proluvial ice-rich permafrost sequences (Ice Complex deposits) radiocarbon-dated from 50 to 17 kyr BP which cover older fluvial sand units luminescence-dated to about 100-50 kyr BP. Paleoecological records reflect tundra-steppe conditions that varied locally, depending on landscape dynamics, during the Marine Isotope Stage (MIS) 4 and 3 periods, and a persistent change to shrub and arctic tundra during Lateglacial and Holocene periods. The study results indicate a continuous fluvial sedimentation environment for the Laptev Sea shelf in the region of the second Lena Delta terrace during the late Pleistocene, and confirm the presence of a dynamic channel system of the paleo-Lena River that flowed at the same time as the nearby subaerial Ice Complex deposits were being formed.

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Section: Discussion and Interpretationmentioning

confidence: 99%

Late Quaternary paleoenvironmental records from the western Lena Delta, Arctic Siberia

Schirrmeister

Grosse

Schnelle

et al. 2011

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…However, its isotopic composition is coherent with Holocene age ice wedges (δ 18 O around −24 to −25 ‰; Meyer et al, 2000Meyer et al, , 2002aMeyer et al, , b, 2010bDereviagin et al, 2002;Schirrmeister et al, 2002;Popp et al, 2006). A period of mild temperatures would also increase the rate of biological respiration processes and the availability of organic matter.…”

Section: Links To the Regional Paleoclimatic Interpretationmentioning

confidence: 92%

Stable isotope and gas properties of two climatically contrasting (Pleistocene and Holocene) ice wedges from Cape Mamontov Klyk, Laptev Sea, northern Siberia

et al. 2013

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Abstract. This paper presents and discusses the texture, fabric, water stable isotopes (δ 18 O, δD) and gas properties (total gas content, O 2 , N 2 , Ar, CO 2 , and CH 4 mixing ratios) of two climatically contrasted (Holocene vs. Pleistocene) ice wedges (IW-26 and IW-28) from Cape Mamontov Klyk, Laptev Sea, in northern Siberia. The two ice wedges display contrasting structures: one being of relatively "clean" ice and the other showing clean ice at its centre as well as debris-rich ice on both sides (referred to as "ice-sand wedge"). Our multiparametric approach allows discrimination between three different ice facies with specific signatures, suggesting different climatic and environmental conditions of formation and various intensities and nature of biological activity. More specifically, crystallography, total gas content and gas composition reveal variable levels of meltwater infiltration and contrasting contributions from anaerobic and aerobic conditions to the biological signatures. Stable isotope data are drawn on to discuss changes in paleoenvironmental conditions and in the temporal variation of the different moisture sources for the snow feeding into the ice wedges infillings. Our data set also supports the previous assumption that the ice wedge IW-28 was formed in Pleistocene and the ice wedge IW-26 in Holocene times. This study sheds more light on the conditions of ice wedge growth under changing environmental conditions.

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“…In the absence of a higher-resolution record, additional Odiatom given that upper permafrost isotope values are similar to that of lake water (Schwamborn et al, 2006(Schwamborn et al, , 2008 Odiatom. In conjunction with cooling trends observed at other sites in North East Russia (Popp et al, 2006) and the Arctic Circle (Bjune et al, 2009) Odiatom from a lake from Southern Alaska (Schiff et al, 2009), both satellite observations and NCEP reanalysis data suggests a marked increase in mean annual temperature around Lake El'gygytgyn in recent decades (Comiso, 2003;Nolan and Brigham-Grette, 2007 Odiatom sufficiently to counteract any mean annual increase in temperatures over the last 200 years. Deriving a better understand of these and other "irregularities" in the Arctic palaeoclimate record is likely essential for furthering our understanding as to the future response of these regions to a globally warming climate.…”

Section: Mid-late Holocene Climatic Variabilitymentioning

confidence: 92%

A combined oxygen and silicon diatom isotope record of Late Quaternary change in Lake El'gygytgyn, North East Siberia

Swann

Leng

Juschus

et al. 2010

Quaternary Science Reviews

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Determining the response of sites within the Arctic Circle to long-term climatic change remains an essential pre-requisite for assessing the susceptibility of these regions to future global warming and Arctic Si data from Lake El'gygytgyn, Russia, and suggest environmental changes that would have impacted across West Beringia from the Last Glacial Maximum to the modern day. In combination with other records, the results raise the potential for climatic teleconnections to exist between the region and sites in the North Atlantic. The presence of a series of 2-3‰ decreases in δ 18Odiatom during both the last glacial and the Holocene indicates the sensitivity of the region to perturbations in the global climate system. Evidence of an unusually long Holocene thermal maximum from 11.4-7.6 ka BP is followed by a cooling trend through the remainder of the Holocene in response to changes in solar insolation. This is culminated over the last 900 years by a significant decrease in δ 18 Odiatom of 2.3‰, which may be related to a strengthening and easterly shift of the Aleutian Low in addition to possible changes in precipitation seasonality.

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Palaeoclimate signals as inferred from stable-isotope composition of ground ice in the Verkhoyansk foreland, Central Yakutia

Cited by 54 publications

References 24 publications

Late Quaternary paleoenvironmental records from the western Lena Delta, Arctic Siberia

Late Quaternary paleoenvironmental records from the western Lena Delta, Arctic Siberia

Stable isotope and gas properties of two climatically contrasting (Pleistocene and Holocene) ice wedges from Cape Mamontov Klyk, Laptev Sea, northern Siberia

A combined oxygen and silicon diatom isotope record of Late Quaternary change in Lake El'gygytgyn, North East Siberia

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