The North Taymyr ice-marginal zone, Arctic Siberia—a preliminary overview and dating

Alexanderson, Helena; Hjort, Christian; Möller, Per; Antonov, Oleg; Павлов, М. В.

doi:10.1016/s0921-8181(01)00133-3

Cited by 69 publications

(116 citation statements)

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“…2) is situated in a proximal region for reconstructing the extent and dynamics of LGM and pre-LGM ice sheets in the northern Kara Sea region. Its southernmost island lies less than 100 km north of the Taymyr Peninsula, with its record of Kara ice impacting low coastal areas during the LGM (Alexanderson et al, 2001). The hitherto paucity ARTICLE IN PRESS Fig.…”

Section: Article In Pressmentioning

confidence: 99%

“…The KSIS recession halted temporarily north of the Byrranga Mountains and constructed the complex North Taymyr ice-marginal Zone (NTZ, Fig. 25B) (Alexanderson et al, 2001(Alexanderson et al, , 2002. Simultaneously an ice-dammed lake was formed between the ice margin and the Byrranga Mountains with meltwater rerouting southwards along the Taymyr River valley, all dated by OSL ages of ca 80 ka BP .…”

Section: Regional Correlationsmentioning

confidence: 99%

“…On the northern flank the KSIS seems to have expanded to the continental shelf margin also in the Early Weichselian, as indicated by IRD peaks in sediment cores retrieved off the shelf, interpreted to represent advance/retreat phases of the KSIS (Knies et al, 2001). The Kara Sea ice sheet re-advanced southwards to the NTZ at around 70-54 ka BP according to OSL ages (Alexanderson et al, 2001(Alexanderson et al, , 2002, i.e. in the Middle Weichselian (Fig.…”

Section: Regional Correlationsmentioning

confidence: 99%

“…Ice from the northern portions of this region clearly flowed southward onto low-lying coastal areas of north-western Taymyr Peninsula (Fig. 1) between 20 and 12 ka BP (Alexanderson et al, 2001) but there is little record of a source for this ice to the north or a dynamic connection to the Barents Sea Ice Sheet across the deep Saint Anna Trough. Marine core data from the Kara Sea continental slope show a paucity of ice-rafted debris (IRD) during the LGM (Knies et al 2001).…”

Section: Introductionmentioning

confidence: 99%

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Severnaya Zemlya, Arctic Russia: a nucleation area for Kara Sea ice sheets during the Middle to Late Quaternary

Möller

Lubinski

Inǵólfsson

et al. 2006

Quaternary Science Reviews

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Quaternary glacial stratigraphy and relative sea-level changes reveal at least four expansions of the Kara Sea ice sheet over the Severnaya Zemlya Archipelago at 791N in the Russian Arctic, as indicated from tills interbedded with marine sediments, exposed in stratigraphic superposition, and from raised-beach sequences that occur at altitudes up to 140 m a.s.l. Chronologic control is provided by AMS 14 C, electron-spin resonance, green-stimulated luminescence, and aspartic-acid geochronology. Major glaciations followed by deglaciation and marine inundation occurred during MIS 10-9, MIS 8-7, MIS 6-5e and MIS 5d-3. The MIS 6-5e event, associated with the high marine limit, implies ice-sheet thickness of 42000 m only 200 km from the deep Arctic Ocean, consistent with published evidence of ice grounding at $1000 m water depth in the central Arctic Ocean. Till fabrics and glacial tectonics record repeated expansions of local ice caps exclusively, suggesting wet-based ice cap advance followed by cold-based regional ice-sheet expansion. Local ice caps over highland sites along the perimeter of the shallow Kara Sea, including the Byrranga Mountains, appear to have repeatedly fostered initiation of a large Kara Sea ice sheet, with exception of the Last Glacial Maximum (MIS 2), when Kara Sea ice did not impact Severnaya Zemlya and barely graced northernmost Taymyr Peninsula. r

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Section: Article In Pressmentioning

confidence: 99%

Section: Regional Correlationsmentioning

confidence: 99%

Section: Regional Correlationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Severnaya Zemlya, Arctic Russia: a nucleation area for Kara Sea ice sheets during the Middle to Late Quaternary

Möller

Lubinski

Inǵólfsson

et al. 2006

Quaternary Science Reviews

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“…French and Harry, 1988;Worsley, 1999), Greenland (Houmark-Nielsen et al, 1994), in many areas in Siberia (e.g. Kaplanskaya and Tarnogradskiy, 1986;Astakhov and Isayeva, 1988;Vaikmäe et al, 1993;Forman et al, 1999;Alexanderson et al, 2001;Manley et al, 2001) and even in the northern part of the Pechora Lowland (Astakhov et al, 1999, p. 35). In Antarctica there is even glacier ice from the Miocene (Sugden et al, 1995).…”

Section: Landscape Developmentmentioning

confidence: 99%

Lake stratigraphy implies an 80 000 yr delayed melting of buried dead ice in northern Russia

Henriksen

Mangerud

Matiouchkov

et al. 2003

J Quaternary Science

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Sediment cores from lakes Kormovoye and Oshkoty in the glaciated region of the Pechora Lowland, northern Russia, reveal sediment gravity flow deposits overlain by lacustrine mud and gyttja. The sediments were deposited mainly during melting of buried glacier ice beneath the lakes. In Lake Kormovoye, differential melting of dead ice caused the lake bottom to subside at different places at different times, resulting in sedimentation and erosion occurring only some few metres apart and at shifting locations, as further melting caused inversion of the lake bottom. Basal radiocarbon dates from the two lakes, ranging between 13 and 9 ka, match with basal dates from other lakes in the Pechora Lowland as well as melting of ice-wedges. This indicates that buried glacier ice has survived for ca. 80 000 years from the last glaciation of this area at 90 ka until about 13 ka when a warmer climate caused melting of permafrost and buried glacier ice, forming numerous lakes and a fresh-looking glacial landscape.

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Geophysical constraints on the dynamics and retreat of the Barents Sea ice sheet as a paleobenchmark for models of marine ice sheet deglaciation

Patton

Andreassen

Bjarnadóttir

et al. 2015

Reviews of Geophysics

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Our understanding of processes relating to the retreat of marine‐based ice sheets, such as the West Antarctic Ice Sheet and tidewater‐terminating glaciers in Greenland today, is still limited. In particular, the role of ice stream instabilities and oceanographic dynamics in driving their collapse are poorly constrained beyond observational timescales. Over numerous glaciations during the Quaternary, a marine‐based ice sheet has waxed and waned over the Barents Sea continental shelf, characterized by a number of ice streams that extended to the shelf edge and subsequently collapsed during periods of climate and ocean warming. Increasing availability of offshore and onshore geophysical data over the last decade has significantly enhanced our knowledge of the pattern and timing of retreat of this Barents Sea ice sheet (BSIS), particularly so from its Late Weichselian maximum extent. We present a review of existing geophysical constraints that detail the dynamic evolution of the BSIS through the last glacial cycle, providing numerical modelers and geophysical workers with a benchmark data set with which to tune ice sheet reconstructions and explore ice sheet sensitivities and drivers of dynamic behavior. Although constraining data are generally spatially sporadic across the Barents and Kara Seas, behaviors such as ice sheet thinning, major ice divide migration, asynchronous and rapid flow switching, and ice stream collapses are all evident. Further investigation into the drivers and mechanisms of such dynamics within this unique paleo‐analogue is seen as a key priority for advancing our understanding of marine‐based ice sheet deglaciations, both in the deep past and in the short‐term future.

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The North Taymyr ice-marginal zone, Arctic Siberia—a preliminary overview and dating

Cited by 69 publications

References 22 publications

Severnaya Zemlya, Arctic Russia: a nucleation area for Kara Sea ice sheets during the Middle to Late Quaternary

Severnaya Zemlya, Arctic Russia: a nucleation area for Kara Sea ice sheets during the Middle to Late Quaternary

Lake stratigraphy implies an 80 000 yr delayed melting of buried dead ice in northern Russia

Geophysical constraints on the dynamics and retreat of the Barents Sea ice sheet as a paleobenchmark for models of marine ice sheet deglaciation

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