STRAIN MAGNITUDE IN TILLS ASSOCIATED WITH THE VARIABLE SUBGLACIAL DRAINAGE CONDITIONS UNDER THE SCANDINAVIAN ICE SHEET

2017 ◽  
Author(s):  
Wlodzimierz Narloch ◽  
Keyword(s):  
Ice Sheet ◽  
Scandinavian Ice Sheet ◽  
Strain Magnitude ◽  
Subglacial Drainage

The signature of strain magnitude in tills associated with the Vistula Ice Stream of the Scandinavian Ice Sheet, central Poland

2012 ◽  
Vol 57 ◽  
pp. 105-120 ◽  
Author(s):  
Włodzimierz Narloch ◽  
Jan A. Piotrowski ◽  
Wojciech Wysota ◽  
Nicolaj K. Larsen ◽  
John Menzies
Keyword(s):  
Ice Sheet ◽  
Central Poland ◽  
Ice Stream ◽  
Scandinavian Ice Sheet ◽  
Strain Magnitude

Subglacial Drainage Routes of the Last Scandinavian Ice Sheet

2020 ◽  
Author(s):  
Nico Dewald ◽  
Chris D. Clark ◽  
Stephen J. Livingstone ◽  
Jeremy C. Ely ◽  
Anna L.C. Hughes
Keyword(s):  
Large Scale ◽  
Ice Sheets ◽  
Ice Sheet ◽  
Drainage Systems ◽  
Drainage Networks ◽  
Short Period ◽  
Scandinavian Ice Sheet ◽  
Subglacial Meltwater ◽  
Subglacial Drainage

<div> <div> <div> <p>The configuration of subglacial drainage systems has a major impact on the dynamics of ice sheets. However, the logistical challenges of measuring subglacial processes beneath contemporary ice sheets hinder our understanding about the spatio-temporal evolution of subglacial drainage systems. Furthermore, today’s observations on contemporary ice sheets are inherently limited to a short period within the process of deglaciation. Landforms generated by the flow of meltwater at the ice-bed interface offer the potential to study both large-scale (10<sup>3</sup>-10<sup>6</sup> km<sup>2</sup>) and long-term (10<sup>3</sup>-10<sup>5</sup> a) developments of subglacial drainage networks beneath past ice sheets. Despite collectively recording subglacial drainage, individual meltwater landform types such as eskers, meltwater channels and tunnel valleys, and hummock corridors have mostly been considered as separate entities. Using high-resolution (1-2 m) DEMs, we summarise the suite of interconnected subglacial meltwater landforms into a common drainage signature herein called a subglacial drainage route. Our integrated map of subglacial meltwater landforms presents the large-scale distribution of major subglacial drainage routes across Scandinavia and provides a basis for future research about the long-term evolution of subglacial drainage networks and its effect on ice dynamics of the Scandinavian Ice Sheet.</p> </div> </div> </div>

scholarly journals Thermomechanical modelling of the Scandinavian ice sheet: implications for ice-stream formation

1999 ◽  
Vol 28 ◽  
pp. 83-89 ◽  
Author(s):  
A. J. Payne ◽  
D.J. Baldwin
Keyword(s):  
Three Dimensional ◽  
Ice Sheet ◽  
Ice Streams ◽  
Ice Flow ◽  
Low Viscosity ◽  
Ice Stream ◽  
Scandinavian Ice Sheet ◽  
The Baltic ◽  
Stream Formation ◽  
Initial Results

AbstractThis work attempts to explain the fan-like landform assemblages observed in satellite images of the area covered by the former Scandinavian ice sheet (SIS). These assemblages have been interpreted as evidence of large ice streams within the SIS. If this interpretation is correct, then it calls into doubt current theories on the formation of ice streams. These theories regard soft sediment and topographic troughs as being the key determinants of ice-stream location. Neither can be used to explain the existence of ice streams on the flat, hard-rock area of the Baltic Shield. Initial results from a three-dimensional, thermomechanical ice-sheet model indicate that interactions between ice flow, form and temperature can create patterns similar to those mentioned above. The model uses a realistic, 20 km resolution gridded topography and a simple parameterization of accumulation and ablation. It produces patterns of maximum ice-sheet extent, which are similar to those reconstructed from the area’s glacial geomorphology. Flow in the maximum, equilibrium ice sheet is dominated by wedges of warm, low-viscosity, fast-flowing ice. These are separated by areas of cold, slow-flowing ice. This patterning appears to develop spontaneously as the modelled ice sheet grows.

Extent and age of the Last Glacial Maximum in the southeastern sector of the Scandinavian Ice Sheet

2001 ◽  
Vol 31 (1-4) ◽  
pp. 407-425 ◽  
Author(s):  
Juha Pekka Lunkka ◽  
Matti Saarnisto ◽  
Valeri Gey ◽  
Igor Demidov ◽  
Vera Kiselova
Keyword(s):  
Last Glacial Maximum ◽  
Ice Sheet ◽  
Glacial Maximum ◽  
Last Glacial ◽  
Scandinavian Ice Sheet ◽  
The Last Glacial Maximum ◽  
The Last Glacial

In situ 10Be exposure ages from southeastern Norway: implications for the geometry of the Weichselian Scandinavian ice sheet

2006 ◽  
Vol 25 (9-10) ◽  
pp. 1097-1109 ◽  
Author(s):  
Henriette Linge ◽  
Edward J. Brook ◽  
Atle Nesje ◽  
Grant M. Raisbeck ◽  
Françoise Yiou ◽  
...  
Keyword(s):  
Ice Sheet ◽  
Scandinavian Ice Sheet ◽  
Exposure Ages

scholarly journals Late Weichselian thermal state at the base of the Scandinavian Ice Sheet

2019 ◽  
Author(s):  
Dmitry Y. Demezhko ◽  
Anastasia A. Gornostaeva ◽  
Alexander N. Antipin
Keyword(s):  
Thermal State ◽  
Ice Sheet ◽  
Ground Surface ◽  
Substantial Part ◽  
Temperature Pattern ◽  
Glacial Cycle ◽  
Surface Temperatures ◽  
Scandinavian Ice Sheet ◽  
Late Weichselian ◽  
The Last Glacial

Abstract. Geothermal estimates of the ground surface temperatures for the last glacial cycle in Northern Europe has been analyzed. During the Middle and Late Weichselian (55–12 kyr BP) a substantial part of this area was covered by the Scandinavian Ice Sheet. The analysis of geothermal data has allowed reconstructing limits of the ice sheet extension and its basal thermal state in the Late Weichselian. Ground surface temperatures outside the ice sheet were extremely low (from −8 to −18 °C). Within the ice sheet, there were both thawed and frozen zones. The revealed temperature pattern is generally consistent with the modern one for the ground surface temperatures in Greenland that makes it possible to consider these ice sheets as analogues. The anomalous climatically induced surface heat flux and orbital insolation of the Earth varied consistently outside the glaciation and independently within the limits of the ice sheet.

Middle Weichselian glacial event in the central part of the Scandinavian Ice Sheet recorded in the Hitura pit, Ostrobothnia, Finland

Boreas ◽  
2008 ◽  
Vol 37 (1) ◽  
pp. 38-54 ◽  
Author(s):  
VELI-PEKKA SALONEN ◽  
ANU KAAKINEN ◽  
SEIJA KULTTI ◽  
ARTO MIETTINEN ◽  
KARI O. ESKOLA ◽  
...  
Keyword(s):  
Ice Sheet ◽  
Scandinavian Ice Sheet

II.—The Scandinavian Ice-Sheet and the Baltic Glacier: a Sceptical Commentary

1899 ◽  
Vol 6 (1) ◽  
pp. 4-13
Author(s):  
Henry H. Howorth
Keyword(s):  
Ice Sheet ◽  
Northern Europe ◽  
Glacial Geology ◽  
Scandinavian Ice Sheet ◽  
The Baltic ◽  
Great Focus ◽  
Geological Magazine

If the paper on the recent geology of Sweden which has already appeared in the GEOLOGICAL MAGAZINE is sound in argument (and I have not met anyone yet who has answered it), it follows that the views ordinarily current in regard to the glacial geology of Northern Europe will have to be greatly modified. Scandinavia is confessedly the great focus and centre of the phenomena which have been interpreted as glacial.

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