Spatial and Temporal Variations in Ice Motion, Belcher Glacier, Devon Island, Nunavut, Canada
This study presents surface ice motion patterns across Devon Ice Cap, with a particular focus on the Belcher Glacier drainage basin. Between summer 2007 and summer 2009, continuous differential GPS (dGPS) measurements were made to determine the motion at points along the centerline of the Belcher Gl...
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ftunivottawa:oai:ruor.uottawa.ca:10393/28611 2023-05-15T16:00:47+02:00 Spatial and Temporal Variations in Ice Motion, Belcher Glacier, Devon Island, Nunavut, Canada Van Wychen, Wesley 2010 167 p. application/pdf http://hdl.handle.net/10393/28611 https://doi.org/10.20381/ruor-12626 en eng University of Ottawa (Canada) Source: Masters Abstracts International, Volume: 49-03, page: 1749. http://hdl.handle.net/10393/28611 http://dx.doi.org/10.20381/ruor-12626 Physical Geography Thesis 2010 ftunivottawa https://doi.org/10.20381/ruor-12626 2021-01-04T17:09:31Z This study presents surface ice motion patterns across Devon Ice Cap, with a particular focus on the Belcher Glacier drainage basin. Between summer 2007 and summer 2009, continuous differential GPS (dGPS) measurements were made to determine the motion at points along the centerline of the Belcher Glacier with ∼cm accuracy. In summer 2008, marker stakes were set out on all accessible tributaries in the Belcher basin, with each stake being surveyed with dGPS several times throughout the season. Using synthetic aperture radar (SAR) speckle tracking techniques new velocity maps were produced of seasonal changes in ice motion for the Belcher Glacier. These were validated against the field dGPS results. Ground penetrating radar (GPR) was used to determine the ice depths of each tributary basin in the Belcher Glacier study region. These ice depths are combined with velocities derived from the speckle tracking results to create flux gates which allow for estimates of total ice discharge for the Belcher basin. These volume estimates can be used to improve mass loss estimates for future modeling of Devon Ice Cap. The velocity results are compared to the work of Burgess et al (2005), who provided flow dynamics and mass loss from the Devon Ice Cap and Belcher Glacier systems using interferometry and speckle tracking of ERS 1/2 data from the mid-1990s and Radarsat-1 data from 2000. These comparisons reveal higher ice velocities on a large glacier in the southeast part of the ice cap (Southeast2 Glacier), which agrees with recent thickening of the stagnant ice into which the glacier drains. Thesis Devon Island glacier* Ice cap Nunavut uO Research (University of Ottawa - uOttawa) Belcher ENVELOPE(-94.172,-94.172,57.936,57.936) Belcher Glacier ENVELOPE(-81.354,-81.354,75.682,75.682) Burgess ENVELOPE(76.128,76.128,-69.415,-69.415) Canada Devon Ice Cap ENVELOPE(-82.499,-82.499,75.335,75.335) Devon Island ENVELOPE(-88.000,-88.000,75.252,75.252) Nunavut |
institution |
Open Polar |
collection |
uO Research (University of Ottawa - uOttawa) |
op_collection_id |
ftunivottawa |
language |
English |
topic |
Physical Geography |
spellingShingle |
Physical Geography Van Wychen, Wesley Spatial and Temporal Variations in Ice Motion, Belcher Glacier, Devon Island, Nunavut, Canada |
topic_facet |
Physical Geography |
description |
This study presents surface ice motion patterns across Devon Ice Cap, with a particular focus on the Belcher Glacier drainage basin. Between summer 2007 and summer 2009, continuous differential GPS (dGPS) measurements were made to determine the motion at points along the centerline of the Belcher Glacier with ∼cm accuracy. In summer 2008, marker stakes were set out on all accessible tributaries in the Belcher basin, with each stake being surveyed with dGPS several times throughout the season. Using synthetic aperture radar (SAR) speckle tracking techniques new velocity maps were produced of seasonal changes in ice motion for the Belcher Glacier. These were validated against the field dGPS results. Ground penetrating radar (GPR) was used to determine the ice depths of each tributary basin in the Belcher Glacier study region. These ice depths are combined with velocities derived from the speckle tracking results to create flux gates which allow for estimates of total ice discharge for the Belcher basin. These volume estimates can be used to improve mass loss estimates for future modeling of Devon Ice Cap. The velocity results are compared to the work of Burgess et al (2005), who provided flow dynamics and mass loss from the Devon Ice Cap and Belcher Glacier systems using interferometry and speckle tracking of ERS 1/2 data from the mid-1990s and Radarsat-1 data from 2000. These comparisons reveal higher ice velocities on a large glacier in the southeast part of the ice cap (Southeast2 Glacier), which agrees with recent thickening of the stagnant ice into which the glacier drains. |
format |
Thesis |
author |
Van Wychen, Wesley |
author_facet |
Van Wychen, Wesley |
author_sort |
Van Wychen, Wesley |
title |
Spatial and Temporal Variations in Ice Motion, Belcher Glacier, Devon Island, Nunavut, Canada |
title_short |
Spatial and Temporal Variations in Ice Motion, Belcher Glacier, Devon Island, Nunavut, Canada |
title_full |
Spatial and Temporal Variations in Ice Motion, Belcher Glacier, Devon Island, Nunavut, Canada |
title_fullStr |
Spatial and Temporal Variations in Ice Motion, Belcher Glacier, Devon Island, Nunavut, Canada |
title_full_unstemmed |
Spatial and Temporal Variations in Ice Motion, Belcher Glacier, Devon Island, Nunavut, Canada |
title_sort |
spatial and temporal variations in ice motion, belcher glacier, devon island, nunavut, canada |
publisher |
University of Ottawa (Canada) |
publishDate |
2010 |
url |
http://hdl.handle.net/10393/28611 https://doi.org/10.20381/ruor-12626 |
long_lat |
ENVELOPE(-94.172,-94.172,57.936,57.936) ENVELOPE(-81.354,-81.354,75.682,75.682) ENVELOPE(76.128,76.128,-69.415,-69.415) ENVELOPE(-82.499,-82.499,75.335,75.335) ENVELOPE(-88.000,-88.000,75.252,75.252) |
geographic |
Belcher Belcher Glacier Burgess Canada Devon Ice Cap Devon Island Nunavut |
geographic_facet |
Belcher Belcher Glacier Burgess Canada Devon Ice Cap Devon Island Nunavut |
genre |
Devon Island glacier* Ice cap Nunavut |
genre_facet |
Devon Island glacier* Ice cap Nunavut |
op_relation |
Source: Masters Abstracts International, Volume: 49-03, page: 1749. http://hdl.handle.net/10393/28611 http://dx.doi.org/10.20381/ruor-12626 |
op_doi |
https://doi.org/10.20381/ruor-12626 |
_version_ |
1766396802413625344 |