Surface and bed morphology of hansbreen, a tidewater glacier in Spitsbergen

Hansbreen, a medium size tidewater glacier in Southern Spitsbergen (Svalbard) is one of the most intensively studied glaciers in the Arctic. This work presents new digital elevation models of its surface and basal topography based on data collected during GPS/GPR campaigns conducted in the spring se...

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Bibliographic Details
Published in:Polish Polar Research
Main Authors: Grabiec, Mariusz, Jania, Jacek, Puczko, Dariusz, Kolondra, Leszek, Budzik, Tomasz
Format: Article in Journal/Newspaper
Language:English
Published: 2012
Subjects:
Arctic
Bedrock Topography
Glaciology
Svalbard
Hansbreen
glacier
Polar Research
Tidewater
Spitsbergen
Online Access:https://hdl.handle.net/20.500.12128/620
https://doi.org/10.2478/v10183-012-0010-7
Description
Summary:Hansbreen, a medium size tidewater glacier in Southern Spitsbergen (Svalbard) is one of the most intensively studied glaciers in the Arctic. This work presents new digital elevation models of its surface and basal topography based on data collected during GPS/GPR campaigns conducted in the spring seasons of 2005 and 2008, as well as on other recent topographic/bathymetric sources. The mean thickness of the glacier is calculated as 171 m and its volume is estimated to be 9.6 (±0.1) km3. The main feature of the bedrock morphology is a vast depression that is overdeepened below sea level and extends as far as 11 km upstream from the glacier front. This depression is divided into four individual basins by distinct sills that are related to the main geological/tectonic features of the area. The bedrock morphology affects considerably the glacier's surface topography. The influence of bedrock and surface relief on the subglacial drainage system geometry is discussed. Vast depressions on the glacier surface favor concentration of meltwater and development of moulin systems.

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