Ice stream retreat dynamics inferred from an assemblage of landforms in the northern Barents Sea

Andreassen, Karin; Winsborrow, Monica; Bjarnadóttir, Lilja Rún; Rüther, Denise Christina

doi:10.1016/j.quascirev.2013.09.015

Cited by 80 publications

(75 citation statements)

References 68 publications

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“…Our data are in agreement with ice stream retreat dynamics presented by Rüther et al (2012) and refine the recent models of the Barents Sea deglaciation (e.g. Winsborrow et al, 2010;Hormes et al, 2013;Andreassen et al, 2014).…”

Section: Subglacial Unit ( > 13 450 Cal Yr Bp)supporting

confidence: 92%

Late Weichselian and Holocene palaeoceanography of Storfjordrenna, southern Svalbard

et al. 2015

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Abstract. Multiproxy analyses (including benthic and planktonic foraminifera, δ 18 O and δ 13 C records, grain-size distribution, ice-rafted debris, XRF geochemistry and magnetic susceptibility) were performed on a 14 C-dated marine sediment core from Storfjordrenna, located off of southern Svalbard. The sediments in the core cover the termination of Bølling-Allerød, the Younger Dryas and the Holocene and reflect general changes in the oceanography/climate of the European Arctic after the last glaciation. Grounded ice of the last Svalbard-Barents Sea Ice Sheet retreated from the coring site ca. 13 950 cal yr BP. During the transition from the subglacial to glaciomarine setting, Arctic Waters dominated the hydrography in Storfjordrenna. However, the waters were not uniformly cold and experienced several warmer spells. A progressive warming and marked change in the nature of the hydrology occurred during the early Holocene. Relatively warm and saline Atlantic Water began to dominate the hydrography starting from approximately 9600 cal yr BP. Although the climate in eastern Svalbard was milder at that time than at present (smaller glaciers), two periods of slight cooling were observed in 9000-8000 and 6000-5500 cal yr BP. A change in the Storfjordrenna oceanography occurred at the beginning of the late Holocene (i.e. 3600 cal yr BP) synchronously with glacier growth on land and enhanced bottom current velocities. Although cooling was observed in the Surface Water, Atlantic Water remained present in the deeper portion of the water column of Storfjordrenna.

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Section: Subglacial Unit ( > 13 450 Cal Yr Bp)supporting

confidence: 92%

Late Weichselian and Holocene palaeoceanography of Storfjordrenna, southern Svalbard

et al. 2015

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“…Ottesen et al 2007;Hogan et al 2010;Andreassen et al 2014;. Notably, such morainic ridges also exist in the East Siberian and Chuckhi seas on the continental slope in water depths even greater than 500 m, away from crossshelf troughs and the shallow continental-shelf margin (Niessen et al 2013;Dove et al 2014; (Fig.…”

Section: Streamlined Landforms and Transverse Ridgesmentioning

confidence: 90%

“…The seafloor of CSTs is often dominated by mega-scale glacial lineations (MSGLs) and closely related, but more subtle, streamlined linear to curvilinear glacial-sedimentary landforms (England et al 2009;Hogan et al 2010;Andreassen et al 2014;. Additional streamlined landforms, often with rock cores, are drumlins and crag-and-tails, for example those mapped in the Amundsen Gulf Trough MacLean et al 2015) and in some parts of Barents Sea CSTs (Ottesen et al 2007;Hogan et al 2010;Andreassen et al 2014).…”

Section: Streamlined Landforms and Transverse Ridgesmentioning

confidence: 99%

“…Additional streamlined landforms, often with rock cores, are drumlins and crag-and-tails, for example those mapped in the Amundsen Gulf Trough MacLean et al 2015) and in some parts of Barents Sea CSTs (Ottesen et al 2007;Hogan et al 2010;Andreassen et al 2014).…”

Section: Streamlined Landforms and Transverse Ridgesmentioning

confidence: 99%

“…GZWs also exist in most of the CSTs that have been mapped using multibeam methods on continental shelves of western Svalbard and the Barents Sea (e.g. Ottesen et al 2007;Rebesco et al 2011;Andreassen et al 2014). Although a lack of high-resolution seafloor imagery may explain why GZWs have not been identified in CSTs of the Lincoln and Kara seas, some of the mapped High Arctic troughs do apparently lack such features.…”

Section: Streamlined Landforms and Transverse Ridgesmentioning

confidence: 99%

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The intensification of northern component deepwater formation during the mid‐Pleistocene climate transition

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We reconstruct mid-Pleistocene (marine isotope stages (MISs) 13-18) deepwater hydrography at Ocean Drilling Program Site 1063 (4583 m water depth, subtropical North Atlantic) using benthic foraminiferal stable isotope records. These new records complete an~900 kyr long stratigraphy spanning (1993) for the importance of the Nordic heat pump in establishing strong 100 kyr cyclicity in late Pleistocene glacial cycles.

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Ice stream retreat dynamics inferred from an assemblage of landforms in the northern Barents Sea

Cited by 80 publications

References 68 publications

Late Weichselian and Holocene palaeoceanography of Storfjordrenna, southern Svalbard

Late Weichselian and Holocene palaeoceanography of Storfjordrenna, southern Svalbard

Submarine glacial landform distribution in the central Arctic Ocean shelf–slope–basin system

The intensification of northern component deepwater formation during the mid‐Pleistocene climate transition

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