Surface velocity and ice thickness of the Müller ice cap, Axel Heiberg Island
Muller ice cap is situated on Axel Heiberg Island in Arctic Canada. It is characterised by a mountanious region separating the ice cap in the east from the outlet glaciers in the west. Research has taken place on the outlet glaciers of the ice cap since 1959, but only limited research has been condu...
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2021
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crcenteros:10.31237/osf.io/6qth3 2023-05-15T15:03:54+02:00 Surface velocity and ice thickness of the Müller ice cap, Axel Heiberg Island Zinck, Ann-Sofie Priergaard 2021 http://dx.doi.org/10.31237/osf.io/6qth3 unknown Center for Open Science https://creativecommons.org/licenses/by/4.0/legalcode CC-BY posted-content 2021 crcenteros https://doi.org/10.31237/osf.io/6qth3 2022-12-20T10:10:19Z Muller ice cap is situated on Axel Heiberg Island in Arctic Canada. It is characterised by a mountanious region separating the ice cap in the east from the outlet glaciers in the west. Research has taken place on the outlet glaciers of the ice cap since 1959, but only limited research has been conducted on the main ice cap, and no full depth ice cores have ever been drilled. The interesting location of the ice cap facing the Arctic Ocean, the chance of finding ice dating back to the Innuitian Ice Sheet, and the fact that no full depth ice cores have been drilled, makes it an obvious place to do so. In order to achieve a long and undisturbed chronology of the ice core, one needs to find a location for the drilling site, where there is a great ice thickness, low surface velocity and little melt. In this project the aim is to make surface velocity maps of the ice cap and estimate the ice thickness to be able to come up with suggestions of possible drill site areas.Surface velocities are calculated using feature tracking of optical satellite images from the Landsat satellites in the period of 2004-2019. A median velocity map of all Landsat 8 velocity maps is used as validation in modelling the ice thickness and in the investigation of possible drill site areas.To estimate the ice thickness various methods are used and are being compared to the ice thickness measured by Operation IceBridge. The first method is an iterative inverse method where the ice sheet model PISM works as a forward model. The model is found to work rather well on the ice cap, with a root mean squared error (RMS) of 138.9 m, but overestimates the ice thickness on the outlet glaciers. The second model uses a simple inversion of the shallow ice approximation. It overestimates the ice thickness in areas with low surface slope, but has a RMS of 131.4 m on the ice cap. The third and and fourth models uses Monte Carlo sampling methods of the shallow ice approximation without and with sliding, respectively. The latter uses an initial ice thickness ... Other/Unknown Material Arctic Arctic Ocean Axel Heiberg Island glacier* Ice cap ice core Ice Sheet COS Center for Open Science (via Crossref) Arctic Arctic Ocean Canada Heiberg ENVELOPE(13.964,13.964,66.424,66.424) Axel Heiberg Island ENVELOPE(-91.001,-91.001,79.752,79.752) Müller Ice Cap ENVELOPE(-91.501,-91.501,79.785,79.785) |
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Open Polar |
collection |
COS Center for Open Science (via Crossref) |
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crcenteros |
language |
unknown |
description |
Muller ice cap is situated on Axel Heiberg Island in Arctic Canada. It is characterised by a mountanious region separating the ice cap in the east from the outlet glaciers in the west. Research has taken place on the outlet glaciers of the ice cap since 1959, but only limited research has been conducted on the main ice cap, and no full depth ice cores have ever been drilled. The interesting location of the ice cap facing the Arctic Ocean, the chance of finding ice dating back to the Innuitian Ice Sheet, and the fact that no full depth ice cores have been drilled, makes it an obvious place to do so. In order to achieve a long and undisturbed chronology of the ice core, one needs to find a location for the drilling site, where there is a great ice thickness, low surface velocity and little melt. In this project the aim is to make surface velocity maps of the ice cap and estimate the ice thickness to be able to come up with suggestions of possible drill site areas.Surface velocities are calculated using feature tracking of optical satellite images from the Landsat satellites in the period of 2004-2019. A median velocity map of all Landsat 8 velocity maps is used as validation in modelling the ice thickness and in the investigation of possible drill site areas.To estimate the ice thickness various methods are used and are being compared to the ice thickness measured by Operation IceBridge. The first method is an iterative inverse method where the ice sheet model PISM works as a forward model. The model is found to work rather well on the ice cap, with a root mean squared error (RMS) of 138.9 m, but overestimates the ice thickness on the outlet glaciers. The second model uses a simple inversion of the shallow ice approximation. It overestimates the ice thickness in areas with low surface slope, but has a RMS of 131.4 m on the ice cap. The third and and fourth models uses Monte Carlo sampling methods of the shallow ice approximation without and with sliding, respectively. The latter uses an initial ice thickness ... |
format |
Other/Unknown Material |
author |
Zinck, Ann-Sofie Priergaard |
spellingShingle |
Zinck, Ann-Sofie Priergaard Surface velocity and ice thickness of the Müller ice cap, Axel Heiberg Island |
author_facet |
Zinck, Ann-Sofie Priergaard |
author_sort |
Zinck, Ann-Sofie Priergaard |
title |
Surface velocity and ice thickness of the Müller ice cap, Axel Heiberg Island |
title_short |
Surface velocity and ice thickness of the Müller ice cap, Axel Heiberg Island |
title_full |
Surface velocity and ice thickness of the Müller ice cap, Axel Heiberg Island |
title_fullStr |
Surface velocity and ice thickness of the Müller ice cap, Axel Heiberg Island |
title_full_unstemmed |
Surface velocity and ice thickness of the Müller ice cap, Axel Heiberg Island |
title_sort |
surface velocity and ice thickness of the müller ice cap, axel heiberg island |
publisher |
Center for Open Science |
publishDate |
2021 |
url |
http://dx.doi.org/10.31237/osf.io/6qth3 |
long_lat |
ENVELOPE(13.964,13.964,66.424,66.424) ENVELOPE(-91.001,-91.001,79.752,79.752) ENVELOPE(-91.501,-91.501,79.785,79.785) |
geographic |
Arctic Arctic Ocean Canada Heiberg Axel Heiberg Island Müller Ice Cap |
geographic_facet |
Arctic Arctic Ocean Canada Heiberg Axel Heiberg Island Müller Ice Cap |
genre |
Arctic Arctic Ocean Axel Heiberg Island glacier* Ice cap ice core Ice Sheet |
genre_facet |
Arctic Arctic Ocean Axel Heiberg Island glacier* Ice cap ice core Ice Sheet |
op_rights |
https://creativecommons.org/licenses/by/4.0/legalcode |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.31237/osf.io/6qth3 |
_version_ |
1766335747738042368 |