Characterizing the glaciological conditions at Halvfarryggen ice dome, Dronning Maud Land, Antarctica
We present a comprehensive approach (including field data, remote sensing and an anisotropic ice-flow model) to characterize Halvfarryggen ice dome in coastal Dronning Maud Land, Antarctica. This is a potential drill site for the International Partnerships in Ice Core Sciences, which has identified...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/168448 2023-05-15T13:42:08+02:00 Characterizing the glaciological conditions at Halvfarryggen ice dome, Dronning Maud Land, Antarctica Drews, Reinhard Martín, Carlos Steinhage, Daniel Eisen, Olaf 2013-03 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/168448 https://dipot.ulb.ac.be/dspace/bitstream/2013/168448/3/doi_152078.pdf en eng uri/info:doi/10.3189/2013JoG12J134 uri/info:scp/84878360008 https://dipot.ulb.ac.be/dspace/bitstream/2013/168448/3/doi_152078.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/168448 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Journal of Glaciology, 59 (213 Géologie et minéralogie info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2013 ftunivbruxelles 2022-06-12T20:36:06Z We present a comprehensive approach (including field data, remote sensing and an anisotropic ice-flow model) to characterize Halvfarryggen ice dome in coastal Dronning Maud Land, Antarctica. This is a potential drill site for the International Partnerships in Ice Core Sciences, which has identified the need for ice cores covering atmospheric conditions during the last few millennia. We derive the surface topography, the ice stratigraphy from radar data, and accumulation rates which vary from 400 to 1670 kgm-2 a-1 due to preferred wind directions and changing surface slope. The stratigraphy shows anticlines and synclines beneath the divides. We transfer Dansgaard-Johnsen age- depth scales from the flanks along isochrones to the divide in the upper 20-50% of the ice thickness and show that they compare well with the results of a full-Stokes, anisotropic ice-flow model which predicts (1) 11 ka BP ice at 90% of the ice thickness, (2) a temporally stable divide for at least 2700-4500 years, (3) basal temperatures below the melting point (-12°C to -5°C) and (4) a highly developed crystal orientation fabric (COF). We suggest drilling into the apices of the deep anticlines, providing a good compromise between record length and temporal resolution and also facilitating studies of the interplay of anisotropic COF and ice flow. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land ice core Journal of Glaciology DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Dronning Maud Land Halvfarryggen ENVELOPE(-6.500,-6.500,-71.167,-71.167) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Géologie et minéralogie |
spellingShingle |
Géologie et minéralogie Drews, Reinhard Martín, Carlos Steinhage, Daniel Eisen, Olaf Characterizing the glaciological conditions at Halvfarryggen ice dome, Dronning Maud Land, Antarctica |
topic_facet |
Géologie et minéralogie |
description |
We present a comprehensive approach (including field data, remote sensing and an anisotropic ice-flow model) to characterize Halvfarryggen ice dome in coastal Dronning Maud Land, Antarctica. This is a potential drill site for the International Partnerships in Ice Core Sciences, which has identified the need for ice cores covering atmospheric conditions during the last few millennia. We derive the surface topography, the ice stratigraphy from radar data, and accumulation rates which vary from 400 to 1670 kgm-2 a-1 due to preferred wind directions and changing surface slope. The stratigraphy shows anticlines and synclines beneath the divides. We transfer Dansgaard-Johnsen age- depth scales from the flanks along isochrones to the divide in the upper 20-50% of the ice thickness and show that they compare well with the results of a full-Stokes, anisotropic ice-flow model which predicts (1) 11 ka BP ice at 90% of the ice thickness, (2) a temporally stable divide for at least 2700-4500 years, (3) basal temperatures below the melting point (-12°C to -5°C) and (4) a highly developed crystal orientation fabric (COF). We suggest drilling into the apices of the deep anticlines, providing a good compromise between record length and temporal resolution and also facilitating studies of the interplay of anisotropic COF and ice flow. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Drews, Reinhard Martín, Carlos Steinhage, Daniel Eisen, Olaf |
author_facet |
Drews, Reinhard Martín, Carlos Steinhage, Daniel Eisen, Olaf |
author_sort |
Drews, Reinhard |
title |
Characterizing the glaciological conditions at Halvfarryggen ice dome, Dronning Maud Land, Antarctica |
title_short |
Characterizing the glaciological conditions at Halvfarryggen ice dome, Dronning Maud Land, Antarctica |
title_full |
Characterizing the glaciological conditions at Halvfarryggen ice dome, Dronning Maud Land, Antarctica |
title_fullStr |
Characterizing the glaciological conditions at Halvfarryggen ice dome, Dronning Maud Land, Antarctica |
title_full_unstemmed |
Characterizing the glaciological conditions at Halvfarryggen ice dome, Dronning Maud Land, Antarctica |
title_sort |
characterizing the glaciological conditions at halvfarryggen ice dome, dronning maud land, antarctica |
publishDate |
2013 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/168448 https://dipot.ulb.ac.be/dspace/bitstream/2013/168448/3/doi_152078.pdf |
long_lat |
ENVELOPE(-6.500,-6.500,-71.167,-71.167) |
geographic |
Dronning Maud Land Halvfarryggen |
geographic_facet |
Dronning Maud Land Halvfarryggen |
genre |
Antarc* Antarctica Dronning Maud Land ice core Journal of Glaciology |
genre_facet |
Antarc* Antarctica Dronning Maud Land ice core Journal of Glaciology |
op_source |
Journal of Glaciology, 59 (213 |
op_relation |
uri/info:doi/10.3189/2013JoG12J134 uri/info:scp/84878360008 https://dipot.ulb.ac.be/dspace/bitstream/2013/168448/3/doi_152078.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/168448 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1766163013110333440 |