Surface movement and mass balance at the Hans Tausen drill site determined by use of GPS
During the deep drilling at Hans Tausen Iskappe in Peary Land, North Greenland, the ice cap has been mapped with GPS. Kinematic GPS and ice penetrating radar measurements were done at the southeast dome extending to approximately 3 km from the drill site at the top of the dome, 82.5°N; 37.5°W (Gunde...
Published in: | Meddelelser om Grønland. Geoscience |
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The Commission for Scientific Research in Greenland /Danish Polar Center
2001
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ftkbcopenhojs:oai:ojs.tidsskrift.dk:article/140227 2024-01-28T10:06:12+01:00 Surface movement and mass balance at the Hans Tausen drill site determined by use of GPS Keller, Kristian Hvidbjerg, Christine S. Gundestrup, Niels Jonsson, Peter 2001-01-01 application/pdf https://tidsskrift.dk/meddrgroenland_geosci/article/view/140227 eng eng The Commission for Scientific Research in Greenland /Danish Polar Center https://tidsskrift.dk/meddrgroenland_geosci/article/view/140227/184220 https://tidsskrift.dk/meddrgroenland_geosci/article/view/140227 Copyright (c) 2001 Copyright by the authors and the Commision for Scientific Research in Greenland / Danish Polar Center Meddelelser om Grønland. Geoscience; Vol. 39 (2001): Meddelelser om Grønland. Geoscience; 115–122 Meddelelser om Grønland. Geoscience; Årg. 39 (2001): Meddelelser om Grønland, Geoscience; 115–122 1600-4590 0106-1046 10.7146/moggeosci.v39i info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2001 ftkbcopenhojs https://doi.org/10.7146/moggeosci.v39i 2024-01-03T23:58:29Z During the deep drilling at Hans Tausen Iskappe in Peary Land, North Greenland, the ice cap has been mapped with GPS. Kinematic GPS and ice penetrating radar measurements were done at the southeast dome extending to approximately 3 km from the drill site at the top of the dome, 82.5°N; 37.5°W (Gundestrup et al. 2001). Furthermore a strain net was established consisting of a center pole at the top of the dome and three rings, each of eight poles, at distances 0.3, 1.5, and 3.0 km from the center. The bottom and surface topography, ice surface velocities from the strain net and precipitation data were used to calculate the present mass balance of the dome. The present mass balance of the dome was found to be +0.04±0.02 m of ice/year, i.e. the ice thickness at the dome increases with a rate of about one third of the annual accumulation. The result is highly consistent and independent on assumptions regarding the ice flow. Our result shows that the central part of the ice cap is far from steady state, implying that simple models cannot be used to determine the time scale of the ice core and the thinning of annual layers. Article in Journal/Newspaper Greenland Hans Tausen iskappe Ice cap ice core North Greenland Peary Land Tidsskrift.dk (The Royal Library, Denmark) Dome The ENVELOPE(166.000,166.000,-85.367,-85.367) Greenland Hans Tausen Iskappe ENVELOPE(-37.500,-37.500,82.583,82.583) Peary ENVELOPE(-63.867,-63.867,-65.250,-65.250) Peary Land ENVELOPE(-32.500,-32.500,82.633,82.633) Meddelelser om Grønland. Geoscience 39 |
institution |
Open Polar |
collection |
Tidsskrift.dk (The Royal Library, Denmark) |
op_collection_id |
ftkbcopenhojs |
language |
English |
description |
During the deep drilling at Hans Tausen Iskappe in Peary Land, North Greenland, the ice cap has been mapped with GPS. Kinematic GPS and ice penetrating radar measurements were done at the southeast dome extending to approximately 3 km from the drill site at the top of the dome, 82.5°N; 37.5°W (Gundestrup et al. 2001). Furthermore a strain net was established consisting of a center pole at the top of the dome and three rings, each of eight poles, at distances 0.3, 1.5, and 3.0 km from the center. The bottom and surface topography, ice surface velocities from the strain net and precipitation data were used to calculate the present mass balance of the dome. The present mass balance of the dome was found to be +0.04±0.02 m of ice/year, i.e. the ice thickness at the dome increases with a rate of about one third of the annual accumulation. The result is highly consistent and independent on assumptions regarding the ice flow. Our result shows that the central part of the ice cap is far from steady state, implying that simple models cannot be used to determine the time scale of the ice core and the thinning of annual layers. |
format |
Article in Journal/Newspaper |
author |
Keller, Kristian Hvidbjerg, Christine S. Gundestrup, Niels Jonsson, Peter |
spellingShingle |
Keller, Kristian Hvidbjerg, Christine S. Gundestrup, Niels Jonsson, Peter Surface movement and mass balance at the Hans Tausen drill site determined by use of GPS |
author_facet |
Keller, Kristian Hvidbjerg, Christine S. Gundestrup, Niels Jonsson, Peter |
author_sort |
Keller, Kristian |
title |
Surface movement and mass balance at the Hans Tausen drill site determined by use of GPS |
title_short |
Surface movement and mass balance at the Hans Tausen drill site determined by use of GPS |
title_full |
Surface movement and mass balance at the Hans Tausen drill site determined by use of GPS |
title_fullStr |
Surface movement and mass balance at the Hans Tausen drill site determined by use of GPS |
title_full_unstemmed |
Surface movement and mass balance at the Hans Tausen drill site determined by use of GPS |
title_sort |
surface movement and mass balance at the hans tausen drill site determined by use of gps |
publisher |
The Commission for Scientific Research in Greenland /Danish Polar Center |
publishDate |
2001 |
url |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/140227 |
long_lat |
ENVELOPE(166.000,166.000,-85.367,-85.367) ENVELOPE(-37.500,-37.500,82.583,82.583) ENVELOPE(-63.867,-63.867,-65.250,-65.250) ENVELOPE(-32.500,-32.500,82.633,82.633) |
geographic |
Dome The Greenland Hans Tausen Iskappe Peary Peary Land |
geographic_facet |
Dome The Greenland Hans Tausen Iskappe Peary Peary Land |
genre |
Greenland Hans Tausen iskappe Ice cap ice core North Greenland Peary Land |
genre_facet |
Greenland Hans Tausen iskappe Ice cap ice core North Greenland Peary Land |
op_source |
Meddelelser om Grønland. Geoscience; Vol. 39 (2001): Meddelelser om Grønland. Geoscience; 115–122 Meddelelser om Grønland. Geoscience; Årg. 39 (2001): Meddelelser om Grønland, Geoscience; 115–122 1600-4590 0106-1046 10.7146/moggeosci.v39i |
op_relation |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/140227/184220 https://tidsskrift.dk/meddrgroenland_geosci/article/view/140227 |
op_rights |
Copyright (c) 2001 Copyright by the authors and the Commision for Scientific Research in Greenland / Danish Polar Center |
op_doi |
https://doi.org/10.7146/moggeosci.v39i |
container_title |
Meddelelser om Grønland. Geoscience |
container_volume |
39 |
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1789332918032662528 |