Measured ice surface velocities on the King George Island ice cap with DGPS
King George Island is located at the northern tip of the Antarctic Peninsula, which is influenced by maritime climate conditions. The observed mean annual air temperature at sea level is -2.4°C. Thus, the ice cap is regarded as sensitive to changing climatic conditions. Ground-penetrating radar surv...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.773310 2023-05-15T13:29:48+02:00 Measured ice surface velocities on the King George Island ice cap with DGPS Rückamp, Martin Blindow, Norbert Suckro, Sonja K Braun, Matthias Holger Humbert, Angelika MEDIAN LATITUDE: -62.081927 * MEDIAN LONGITUDE: -58.567781 * SOUTH-BOUND LATITUDE: -62.180390 * WEST-BOUND LONGITUDE: -58.917420 * NORTH-BOUND LATITUDE: -61.965350 * EAST-BOUND LONGITUDE: -58.222540 * MINIMUM ELEVATION: 90 m a.s.l. * MAXIMUM ELEVATION: 700 m a.s.l. 2012-01-02 text/tab-separated-values, 610 data points https://doi.pangaea.de/10.1594/PANGAEA.773310 https://doi.org/10.1594/PANGAEA.773310 en eng PANGAEA Rückamp, Martin; Braun, Matthias Holger; Suckro, Sonja K; Blindow, Norbert (2011): Observed glacial changes on the King George Island ice cap, Antarctica, in the last decade. Global and Planetary Change, 79(1-2), 99-109, https://doi.org/10.1016/j.gloplacha.2011.06.009 https://doi.pangaea.de/10.1594/PANGAEA.773310 https://doi.org/10.1594/PANGAEA.773310 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Rückamp, Martin; Blindow, Norbert; Suckro, Sonja K; Braun, Matthias Holger; Humbert, Angelika (2010): Dynamics of the ice cap on King George Island, Antarctica: field measurements and numerical simulations. Annals of Glaciology, 51(55), 80-90, https://doi.org/10.3189/172756410791392817 ELEVATION Ice-flow direction King_George_Island King George Island Antarctic Peninsula LATITUDE LONGITUDE Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 UTM Easting Universal Transverse Mercator UTM Northing UTM Zone Velocity magnitude Dataset 2012 ftpangaea https://doi.org/10.1594/PANGAEA.773310 https://doi.org/10.3189/172756410791392817 https://doi.org/10.1016/j.gloplacha.2011.06.009 2023-01-20T08:53:01Z King George Island is located at the northern tip of the Antarctic Peninsula, which is influenced by maritime climate conditions. The observed mean annual air temperature at sea level is -2.4°C. Thus, the ice cap is regarded as sensitive to changing climatic conditions. Ground-penetrating radar surveys indicate a partly temperate ice cap with an extended water layer at the firn/ice transition of the up to 700 m high ice cap. Measured firn temperatures are close to 0°C at the higher elevations, and they differ considerably from the measured mean annual air temperature. The aim of this paper is to present ice-flow dynamics by means of observations and simulations of the flow velocities. During several field campaigns from 1997/98 to 2008/09, ice surface velocities were derived with repeated differential GPS measurements. Ice velocities vary from 0.7 m/a at the dome to 112.1 m/a along steep slopes. For the western part of the ice cap a three-dimensional diagnostic full-Stokes model was applied to calculate ice flow. Parameters of the numerical model were identified with respect to measured ice surface velocities. The simulations indicate cold ice at higher elevations, while temperate ice at lower elevations is consistent with the observations. Dataset Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Arctic Ice cap King George Island Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Antarctic Peninsula Arctic King George Island The Antarctic ENVELOPE(-58.917420,-58.222540,-61.965350,-62.180390) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ELEVATION Ice-flow direction King_George_Island King George Island Antarctic Peninsula LATITUDE LONGITUDE Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 UTM Easting Universal Transverse Mercator UTM Northing UTM Zone Velocity magnitude |
spellingShingle |
ELEVATION Ice-flow direction King_George_Island King George Island Antarctic Peninsula LATITUDE LONGITUDE Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 UTM Easting Universal Transverse Mercator UTM Northing UTM Zone Velocity magnitude Rückamp, Martin Blindow, Norbert Suckro, Sonja K Braun, Matthias Holger Humbert, Angelika Measured ice surface velocities on the King George Island ice cap with DGPS |
topic_facet |
ELEVATION Ice-flow direction King_George_Island King George Island Antarctic Peninsula LATITUDE LONGITUDE Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 UTM Easting Universal Transverse Mercator UTM Northing UTM Zone Velocity magnitude |
description |
King George Island is located at the northern tip of the Antarctic Peninsula, which is influenced by maritime climate conditions. The observed mean annual air temperature at sea level is -2.4°C. Thus, the ice cap is regarded as sensitive to changing climatic conditions. Ground-penetrating radar surveys indicate a partly temperate ice cap with an extended water layer at the firn/ice transition of the up to 700 m high ice cap. Measured firn temperatures are close to 0°C at the higher elevations, and they differ considerably from the measured mean annual air temperature. The aim of this paper is to present ice-flow dynamics by means of observations and simulations of the flow velocities. During several field campaigns from 1997/98 to 2008/09, ice surface velocities were derived with repeated differential GPS measurements. Ice velocities vary from 0.7 m/a at the dome to 112.1 m/a along steep slopes. For the western part of the ice cap a three-dimensional diagnostic full-Stokes model was applied to calculate ice flow. Parameters of the numerical model were identified with respect to measured ice surface velocities. The simulations indicate cold ice at higher elevations, while temperate ice at lower elevations is consistent with the observations. |
format |
Dataset |
author |
Rückamp, Martin Blindow, Norbert Suckro, Sonja K Braun, Matthias Holger Humbert, Angelika |
author_facet |
Rückamp, Martin Blindow, Norbert Suckro, Sonja K Braun, Matthias Holger Humbert, Angelika |
author_sort |
Rückamp, Martin |
title |
Measured ice surface velocities on the King George Island ice cap with DGPS |
title_short |
Measured ice surface velocities on the King George Island ice cap with DGPS |
title_full |
Measured ice surface velocities on the King George Island ice cap with DGPS |
title_fullStr |
Measured ice surface velocities on the King George Island ice cap with DGPS |
title_full_unstemmed |
Measured ice surface velocities on the King George Island ice cap with DGPS |
title_sort |
measured ice surface velocities on the king george island ice cap with dgps |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.773310 https://doi.org/10.1594/PANGAEA.773310 |
op_coverage |
MEDIAN LATITUDE: -62.081927 * MEDIAN LONGITUDE: -58.567781 * SOUTH-BOUND LATITUDE: -62.180390 * WEST-BOUND LONGITUDE: -58.917420 * NORTH-BOUND LATITUDE: -61.965350 * EAST-BOUND LONGITUDE: -58.222540 * MINIMUM ELEVATION: 90 m a.s.l. * MAXIMUM ELEVATION: 700 m a.s.l. |
long_lat |
ENVELOPE(-58.917420,-58.222540,-61.965350,-62.180390) |
geographic |
Antarctic Antarctic Peninsula Arctic King George Island The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Arctic King George Island The Antarctic |
genre |
Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Arctic Ice cap King George Island Sea ice |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Arctic Ice cap King George Island Sea ice |
op_source |
Supplement to: Rückamp, Martin; Blindow, Norbert; Suckro, Sonja K; Braun, Matthias Holger; Humbert, Angelika (2010): Dynamics of the ice cap on King George Island, Antarctica: field measurements and numerical simulations. Annals of Glaciology, 51(55), 80-90, https://doi.org/10.3189/172756410791392817 |
op_relation |
Rückamp, Martin; Braun, Matthias Holger; Suckro, Sonja K; Blindow, Norbert (2011): Observed glacial changes on the King George Island ice cap, Antarctica, in the last decade. Global and Planetary Change, 79(1-2), 99-109, https://doi.org/10.1016/j.gloplacha.2011.06.009 https://doi.pangaea.de/10.1594/PANGAEA.773310 https://doi.org/10.1594/PANGAEA.773310 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.773310 https://doi.org/10.3189/172756410791392817 https://doi.org/10.1016/j.gloplacha.2011.06.009 |
_version_ |
1766003220427046912 |