The Taimyr Peninsula and the Severnaya Zemlya archipelago, Arctic Russia: a synthesis of glacial history and palaeo-environmental change during the Last Glacial cycle (MIS 5e–2)

Möller, Per; Alexanderson, Helena; Funder, Svend; Hjort, Christian

doi:10.1016/j.quascirev.2014.10.018

Cited by 39 publications

(72 citation statements)

References 68 publications

(91 reference statements)

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“…The absence of glacial ice during the LGM is consistent with the existence of permafrost across much of the submarine East Siberian shelf (Romanovskii et al, 2004;Nicolsky et al, 2012), the reported absence of ice on Wrangel island during the LGM (Gaultieri et al, 2005) and the comparatively limited extent of the Kara ice sheet on the Barents Sea (Möller et al, 2015). The lack of glacial ice in the East Siberian Sea and the Kara Sea during the LGM are both ascribed to generally arid conditions due to a reduction in atmospheric moisture supply to these regions (Gaultieri et al, 2005;Möller et al, 2015).…”

Section: Timing and Association With Ice Sheets On The Siberian Shelfsupporting

confidence: 68%

“…Late Quaternary glacial extents in the Kara Sea, specifically over the Taimyr Peninsula and the Severnaya Zemlya archipelago, were considerably larger during MIS 5d (109 ka) and 5b (87 ka), compared to the MIS 4 and LGM extents (Möller et al, 2015). However, when considering the most recent estimates for the age of glacial ice on the New Siberian islands (Basilyan et al, 2008(Basilyan et al, , 2010 and the date of deep-water glacial features that indicate ice flow directions from the East Siberian shelf , the most plausible explanation is that an ice stream was active in the De Long Trough during MIS 6.…”

Section: Timing and Association With Ice Sheets On The Siberian Shelfmentioning

confidence: 93%

“…The lack of glacial ice in the East Siberian Sea and the Kara Sea during the LGM are both ascribed to generally arid conditions due to a reduction in atmospheric moisture supply to these regions (Gaultieri et al, 2005;Möller et al, 2015). Glacial landforms indicating ice flow from the East Siberian shelf that are mapped on the continental slope of the East Siberian Sea, Arlis Plateau and southern Lomonosov Ridge were also formed prior to the LGM (Niessen et al, 2013;Jakobsson et al, 2016) and are consistent with the absence of glacial ice in the De Long Trough during this time.…”

Section: Timing and Association With Ice Sheets On The Siberian Shelfmentioning

confidence: 99%

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The De Long Trough: a newly discovered glacial trough on the East Siberian continental margin

et al. 2017

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Abstract. Ice sheets extending over parts of the East Siberian continental shelf have been proposed for the last glacial period and during the larger Pleistocene glaciations. The sparse data available over this sector of the Arctic Ocean have left the timing, extent and even existence of these ice sheets largely unresolved. Here we present new geophysical mapping and sediment coring data from the East Siberian shelf and slope collected during the 2014 SWERUS-C3 expedition (SWERUS-C3: Swedish -Russian -US Arctic Ocean Investigation of Climate-Cryosphere-Carbon Interactions). The multibeam bathymetry and chirp sub-bottom profiles reveal a set of glacial landforms that include grounding zone formations along the outer continental shelf, seaward of which lies a > 65 m thick sequence of glacio-genic debris flows. The glacial landforms are interpreted to lie at the seaward end of a glacial trough -the first to be reported on the East Siberian margin, here referred to as the De Long Trough because of its location due north of the De Long Islands. Stratigraphy and dating of sediment cores show that a drape of acoustically laminated sediments covering the glacial deposits is older than ∼ 50 cal kyr BP. This provides direct evidence for extensive glacial activity on the Siberian shelf that predates the Last Glacial Maximum and most likely occurred during the Saalian (Marine Isotope Stage (MIS) 6).

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Section: Timing and Association With Ice Sheets On The Siberian Shelfsupporting

confidence: 68%

Section: Timing and Association With Ice Sheets On The Siberian Shelfmentioning

confidence: 93%

Section: Timing and Association With Ice Sheets On The Siberian Shelfmentioning

confidence: 99%

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The De Long Trough: a newly discovered glacial trough on the East Siberian continental margin

et al. 2017

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“…The formation of the Buchchagy IC during MIS5 sensu lato and its persistence since then indicate nonglacial environments in the study region at least during the last glacial cycle (Fig. 1a;M€ oller et al, 2015). Late Pleistocene glaciations never reached the East Siberian arctic lowlands and the adjacent shelf (Elias and Brigham-Grette, 2013).…”

Section: Formation Degradation and Preservation Of The Mis5 Buchchamentioning

confidence: 85%

Ice Complex permafrost of MIS5 age in the Dmitry Laptev Strait coastal region (East Siberian Arctic)

Wetterich

Tumskoy

Rudaya

et al. 2016

Quaternary Science Reviews

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ice-wedge ice indicates winter conditions colder than during the MIS3 interstadial and warmer than during MIS2 stadial, and similar atmospheric winter moisture sources as during the MIS2 stadial. Buchchagy Ice Complex pollen spectra reveal tundra-steppe vegetation and harsher summer conditions than during the MIS3 interstadial and rather similar vegetation as during the MIS2 stadial. Short-term climatic variability during MIS5 is reflected in the record. Even though the regional chronostratigraphic relationship of the Buchchagy Ice Complex to the Last Interglacial remains unclear because numerical dating is widely lacking, the present study indicates permafrost (Ice Complex) formation during MIS5 sensu lato, and its preservation afterwards. Palaeoenvironmental insights into past climate and the periglacial landscape dynamics of arctic lowlands in eastern Siberia are deduced from the record.

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“…This dependency is especially of importance when extending the study to the early phases of the Weichselian glaciation, where the Kara Sea ice sheet was much larger [21], and so deviations from eustatic sea level in the Laptev Sea were substantial, and in former glaciation periods when an East Siberian ice sheet is proposed [15,23].…”

Section: Discussionmentioning

confidence: 99%

Sea-level evolution of the Laptev Sea and the East Siberian Sea since the last glacial maximum

Klemann

Heim

Bauch

et al. 2015

Arktos

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The Laptev Sea and East Siberian Sea are extended shallow shelf seas which were largely land fallen during glacial periods when the global mean sea level was more than 100 m below its present value. To understand the environmental history, and, in particular, the evolution of the large offshore permafrost complexes in this region, a reconstruction of the sea-level variation and shoreline migration was undertaken. Sufficient geological information by sea-level indicators is missing and, in recent studies, the eustatic sea-level curve is commonly applied, neglecting any isostatic adjustment processes. In this study, we discuss the influence of glacial isostatic adjustment (GIA), which describes the deformational response of the solid earth and the resulting sea-level variations due to the water mass redistribution between ice sheets and ocean during a glacial cycle. Motivated as a sensitivity study, we consider GIA-induced sea-level variations from the last glacial maximum (LGM) to present and apply an earth model ensemble which covers the range of reasonable rheological parametrisations for a passive continental margin. The geodynamically consistent sea-level reconstructions are applied to predict the shoreline retreat in the Laptev and East Siberian seas. We confirm with this study that the application of the eustatic sea-level curve is a valid first-order approximation for reconstructing the shoreline position from LGM to present, whereas the sea-level heights away from the shoreline inferred from the eustatic sea-level curve differ markedly from GIA predictions.

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The Taimyr Peninsula and the Severnaya Zemlya archipelago, Arctic Russia: a synthesis of glacial history and palaeo-environmental change during the Last Glacial cycle (MIS 5e–2)

Cited by 39 publications

References 68 publications

The De Long Trough: a newly discovered glacial trough on the East Siberian continental margin

The De Long Trough: a newly discovered glacial trough on the East Siberian continental margin

Ice Complex permafrost of MIS5 age in the Dmitry Laptev Strait coastal region (East Siberian Arctic)

Sea-level evolution of the Laptev Sea and the East Siberian Sea since the last glacial maximum

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