Surface and bed morphology of hansbreen, a tidewater glacier in Spitsbergen
| Autor: | Leszek Kolondra, Tomasz Budzik, Mariusz Grabiec, Dariusz Puczko, Jacek Jania |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
geography
geography.geographical_feature_category 010504 meteorology & atmospheric sciences Ecology Bedrock Topography Glaciology Bedrock Moulin Tidewater glacier cycle Glacier 15. Life on land 010502 geochemistry & geophysics Glacier morphology 01 natural sciences Svalbard Glacier mass balance Arctic Meltwater Geomorphology Ecology Evolution Behavior and Systematics Geology 0105 earth and related environmental sciences |
| Zdroj: | Polish Polar Research |
| Popis: | Surface and bed morphology of Hansbreen, a tidewater glacier in SpitsbergenHansbreen, 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. |
| Databáze: | OpenAIRE |
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