Drumlins in the Nordenskiöldbreen forefield, Svalbard

Allaart, Lis; Friis, Nina; Inǵólfsson, Ólafur; Håkansson, Lena; Noormets, Riko; Farnsworth, Wesley R.; Mertes, Jordan; Schomacker, Anders

doi:10.1080/11035897.2018.1466832

Cited by 24 publications

(28 citation statements)

References 92 publications

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“…Based on the orientation (sub)parallel to the fjord axis and the asymmetric morphology, we interpret these landforms as drumlins, and crag-and-tails, formed by streaming grounded ice (e.g. Stokes & Clark 2002;Ottesen & Dowdeswell 2009;Benn & Evans 2010;Dowdeswell et al 2010;Fransner et al 2016;Allaart et al 2018). Similar landforms occur in Rijpfjorden (~140 km NE of Wijdefjorden) and Lomfjorden ( Fig.…”

Section: Sea-floor Geomorphology: Description and Interpretationmentioning

confidence: 86%

Late Quaternary glacier and sea‐ice history of northern Wijdefjorden, Svalbard

Allaart

Müller

Schomacker

et al. 2020

Boreas

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The deglaciation history and Holocene environmental evolution of northern Wijdefjorden, Svalbard, are reconstructed using sediment cores and acoustic data (multibeam swath bathymetry and sub‐bottom profiler data). Results reveal that the fjord mouth was deglaciated prior to 14.5±0.3 cal. ka BP and deglaciation occurred stepwise. Biomarker analyses show rapid variations in water temperature and sea ice cover during the deglaciation, and cold conditions during the Younger Dryas, followed by minimum sea ice cover throughout the Early Holocene, until c. 7 cal. ka BP. Most of the glaciers in Wijdefjorden had retreated onto land by c. 7.6±0.2 cal. ka BP. Subsequently, the sea‐ice extent increased and remained high throughout the last part of the Holocene. We interpret a high Late Holocene sediment accumulation rate in the northernmost core to reflect increased sediment flux to the site from the outlet of the adjacent lake Femmilsjøen, related to glacier growth in the Femmilsjøen catchment area. Furthermore, increased sea ice cover, lower water temperatures and the re‐occurrence of ice‐rafted debris indicate increased local glacier activity and overall cooler conditions in Wijdefjorden after c. 0.5 cal. ka BP. We summarize our findings in a conceptual model for the depositional environment in northern Wijdefjorden from the Late Weichselian until present.

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Section: Sea-floor Geomorphology: Description and Interpretationmentioning

confidence: 86%

Late Quaternary glacier and sea‐ice history of northern Wijdefjorden, Svalbard

Allaart

Müller

Schomacker

et al. 2020

Boreas

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“…With improvements in technology, high-resolution (ground resolution <0.5 m per pixel) digital copies of aerial photographs have become widely available and used for glacial geomorphological mapping (e.g. Brown et al, 2011a;Bradwell et al, 2013;Brynjólfsson et al, 2014;Jónsson et al, 2014;Pearce et al, 2014;Schomacker et al, 2014;Chandler et al, 2016a;Evans et al, 2016c;Lardeux et al, 2016;Lønne, 2016;Allaart et al, 2018). Indeed, digital aerial photographs, along with scanned copies of archival aerial photographs, are now more widely used than hard-copy stereoscopic aerial photographs, particularly in modern glacial settings.…”

Section: Digital Aerial Photographsmentioning

confidence: 99%

Glacial geomorphological mapping: A review of approaches and frameworks for best practice

Chandler

Lovell

Boston

et al. 2018

Earth-Science Reviews

173

116

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Geomorphological mapping is a well-established method for examining earth surface processes and landscape evolution in a range of environmental contexts. In glacial research, it provides crucial data for a wide range of process-oriented and palaeoglaciological reconstruction studies; in the latter case providing an essential geomorphological framework for establishing glacial chronologies. In recent decades, there have been significant developments in remote sensing and Geographical Information Systems (GIS), with a plethora of high-quality remotely-sensed datasets now (often freely) available. Most recently, the emergence of unmanned aerial vehicle (UAV) technology has allowed sub-decimetre scale aerial images and Digital Elevation Models (DEMs) to be obtained. Traditional field mapping methods still have an important role in 'work streams' that recognise the different approaches typically used in mapping landforms produced by ice masses of different sizes: (i) mapping of ice sheet geomorphological imprints using a combined remote sensing approach, with some field checking (where feasible); and (ii) mapping of alpine and plateau-style ice mass (cirque glacier, valley glacier, icefield and icecap) geomorphological imprints using remote sensing and considerable field mapping. Key challenges to accurate and robust geomorphological mapping are highlighted, often necessitating compromises and pragmatic solutions. The importance of combining multiple datasets and/or mapping approaches is emphasised, akin to multi-proxy/-method approaches used in many Earth Science disciplines. Based on our review, we provide idealised frameworks and general recommendations to ensure best practice in future studies and aid in accuracy assessment, comparison and integration of geomorphological data. These will be of particular value where geomorphological data are incorporated in large compilations and subsequently used for palaeoglaciological reconstructions. Finally, we stress that robust interpretations of glacial landforms and landscapes invariably requires additional chronological and/or sedimentological evidence, and that such data should be collected as part of a coupled inductive-deductive approach.

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“…Earlier investigations into glaciers and glacial landforms near Petuniabukta provide a substantial background knowledge of both the geomorphology 3 (e.g. Allaart et al, 2018;Evans et al, 2012;Ewertowski, 2014;Ewertowski et al, 2016;Ewertowski et al, 2012;Ewertowski and Tomczyk, 2015;Gibas et al, 2005;Gonera and Kasprzak, 1989;Hanáček et al, 2011;Karczewski, 1989;Karczewski et al, 1990;Karczewski and Kłysz, 1994;Kłysz, 1985;Křížek et al, 2017;Pleskot, 2015;Rachlewicz, 2009;Rachlewicz, 2010;Rachlewicz and Szczuciński, 2008;Stankowski et al, 1989;Strzelecki et al, 2018;Strzelecki et al, 2015;Szuman and Kasprzak, 2010), and glaciology (e.g. Małecki, 2013;Małecki, 2014;Małecki, 2016;Małecki et al, 2013;Rachlewicz, 2009;e.g.…”

Section: Study Areamentioning

confidence: 99%

Quantification of historical landscape change on the foreland of a receding polythermal glacier, Hørbyebreen, Svalbard

et al. 2019

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Drumlins in the Nordenskiöldbreen forefield, Svalbard

Cited by 24 publications

References 92 publications

Late Quaternary glacier and sea‐ice history of northern Wijdefjorden, Svalbard

Late Quaternary glacier and sea‐ice history of northern Wijdefjorden, Svalbard

Glacial geomorphological mapping: A review of approaches and frameworks for best practice

Quantification of historical landscape change on the foreland of a receding polythermal glacier, Hørbyebreen, Svalbard

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