Remote sensing and mapping of geomorphological features in Hanaskogdalen, Svalbard
Formerly glaciated areas still under the influence of retreating glaciers, also referred to as paraglacial environments, are sensitive to climatic changes. This manifests in the alteration of geomorphological processes. Already, Arctic settlements like Longyearbyen (Svalbard, Norway) are increasingl...
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ftdlr:oai:elib.dlr.de:205330 2024-09-15T18:07:53+00:00 Remote sensing and mapping of geomorphological features in Hanaskogdalen, Svalbard Ellermann, Fabian Johnsson, Andreas Wetzel, KF Hauber, Ernst Bucher, Tilman Hiesinger, H. Schmedemann, N. Gessner, Matthias Sassenroth, Cynthia Gruber, Elisabeth 2024 https://elib.dlr.de/205330/ https://fileshare.uibk.ac.at/f/ebef338271b44ca59816/ unknown Ellermann, Fabian und Johnsson, Andreas und Wetzel, KF und Hauber, Ernst und Bucher, Tilman und Hiesinger, H. und Schmedemann, N. und Gessner, Matthias und Sassenroth, Cynthia (2024) Remote sensing and mapping of geomorphological features in Hanaskogdalen, Svalbard. In: Discussing Geographic Method(ologie)s: Integration, Experimentation, and Innovation - Book of Abstracts, 2024, Seiten 42-43. Geographiewerkstatt 2024, 2024-03-07 - 2024-03-08, Innsbruck. Institut für Optische Sensorsysteme Institut für Planetenforschung Konferenzbeitrag PeerReviewed 2024 ftdlr 2024-08-01T23:40:06Z Formerly glaciated areas still under the influence of retreating glaciers, also referred to as paraglacial environments, are sensitive to climatic changes. This manifests in the alteration of geomorphological processes. Already, Arctic settlements like Longyearbyen (Svalbard, Norway) are increasingly threatened by landslides and coastal erosion. Facing the concerns of environmental change in the Arctic, this study investigates trends in the geomorphological regimes of the western Spitsbergen valley of Hanaskogdalen (Svalbard, Norway). Therefore, a set of five airborne images from the years 1936, 1961, 1990, 2008, and 2020, as well as two digital surface models from 2008 and 2020, were used to map different surface processes in QGIS. These included the loss of ice-covered area and volume changes of the glacier Brandtbreen, coastline changes, debris flow volumes and frequency, as well as the occurrence and extent of active layer-detachment slides. The results revealed changing patterns, particularly accelerations in the more recent images. Glacial ice-covered area was lost increasingly, with volume losses fitting well within the rates of other Svalbard glaciers. Overall, Hanaskogdalen’s coastline retreated except for the central part, where a river formed an alluvial fan. Debris flows changed from a transport-limited system to being more frequent yet less voluminous. Finally, a whole series of active-layer detachment slides occurred on the recently exposed moraines of Brandtbreen. Airborne data and GIS mapping proved to be an accurate and versatile tool, especially in newer images. The findings are in agreement with the anticipated effects of global warming on the observed geomorphological features, underlining the vulnerability of Arctic environments. Conference Object glacier glacier Global warming Longyearbyen Svalbard Spitsbergen German Aerospace Center: elib - DLR electronic library |
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Open Polar |
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German Aerospace Center: elib - DLR electronic library |
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ftdlr |
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unknown |
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Institut für Optische Sensorsysteme Institut für Planetenforschung |
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Institut für Optische Sensorsysteme Institut für Planetenforschung Ellermann, Fabian Johnsson, Andreas Wetzel, KF Hauber, Ernst Bucher, Tilman Hiesinger, H. Schmedemann, N. Gessner, Matthias Sassenroth, Cynthia Remote sensing and mapping of geomorphological features in Hanaskogdalen, Svalbard |
topic_facet |
Institut für Optische Sensorsysteme Institut für Planetenforschung |
description |
Formerly glaciated areas still under the influence of retreating glaciers, also referred to as paraglacial environments, are sensitive to climatic changes. This manifests in the alteration of geomorphological processes. Already, Arctic settlements like Longyearbyen (Svalbard, Norway) are increasingly threatened by landslides and coastal erosion. Facing the concerns of environmental change in the Arctic, this study investigates trends in the geomorphological regimes of the western Spitsbergen valley of Hanaskogdalen (Svalbard, Norway). Therefore, a set of five airborne images from the years 1936, 1961, 1990, 2008, and 2020, as well as two digital surface models from 2008 and 2020, were used to map different surface processes in QGIS. These included the loss of ice-covered area and volume changes of the glacier Brandtbreen, coastline changes, debris flow volumes and frequency, as well as the occurrence and extent of active layer-detachment slides. The results revealed changing patterns, particularly accelerations in the more recent images. Glacial ice-covered area was lost increasingly, with volume losses fitting well within the rates of other Svalbard glaciers. Overall, Hanaskogdalen’s coastline retreated except for the central part, where a river formed an alluvial fan. Debris flows changed from a transport-limited system to being more frequent yet less voluminous. Finally, a whole series of active-layer detachment slides occurred on the recently exposed moraines of Brandtbreen. Airborne data and GIS mapping proved to be an accurate and versatile tool, especially in newer images. The findings are in agreement with the anticipated effects of global warming on the observed geomorphological features, underlining the vulnerability of Arctic environments. |
author2 |
Gruber, Elisabeth |
format |
Conference Object |
author |
Ellermann, Fabian Johnsson, Andreas Wetzel, KF Hauber, Ernst Bucher, Tilman Hiesinger, H. Schmedemann, N. Gessner, Matthias Sassenroth, Cynthia |
author_facet |
Ellermann, Fabian Johnsson, Andreas Wetzel, KF Hauber, Ernst Bucher, Tilman Hiesinger, H. Schmedemann, N. Gessner, Matthias Sassenroth, Cynthia |
author_sort |
Ellermann, Fabian |
title |
Remote sensing and mapping of geomorphological features in Hanaskogdalen, Svalbard |
title_short |
Remote sensing and mapping of geomorphological features in Hanaskogdalen, Svalbard |
title_full |
Remote sensing and mapping of geomorphological features in Hanaskogdalen, Svalbard |
title_fullStr |
Remote sensing and mapping of geomorphological features in Hanaskogdalen, Svalbard |
title_full_unstemmed |
Remote sensing and mapping of geomorphological features in Hanaskogdalen, Svalbard |
title_sort |
remote sensing and mapping of geomorphological features in hanaskogdalen, svalbard |
publishDate |
2024 |
url |
https://elib.dlr.de/205330/ https://fileshare.uibk.ac.at/f/ebef338271b44ca59816/ |
genre |
glacier glacier Global warming Longyearbyen Svalbard Spitsbergen |
genre_facet |
glacier glacier Global warming Longyearbyen Svalbard Spitsbergen |
op_relation |
Ellermann, Fabian und Johnsson, Andreas und Wetzel, KF und Hauber, Ernst und Bucher, Tilman und Hiesinger, H. und Schmedemann, N. und Gessner, Matthias und Sassenroth, Cynthia (2024) Remote sensing and mapping of geomorphological features in Hanaskogdalen, Svalbard. In: Discussing Geographic Method(ologie)s: Integration, Experimentation, and Innovation - Book of Abstracts, 2024, Seiten 42-43. Geographiewerkstatt 2024, 2024-03-07 - 2024-03-08, Innsbruck. |
_version_ |
1810445244572893184 |