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...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
International Glaciological Society
2013
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/501709/ https://nora.nerc.ac.uk/id/eprint/501709/1/Drews%20et%20al%202013.pdf https://doi.org/10.3189/2013JoG12J134 |
id |
ftnerc:oai:nora.nerc.ac.uk:501709 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:501709 2023-05-15T13:48:07+02:00 Characterizing the glaciological conditions at Halvfarryggen ice dome, Dronning Maud Land, Antarctica Drews, Reinhard Martin, Carlos Steinhage, Daniel Eisen, Olaf 2013-03 text http://nora.nerc.ac.uk/id/eprint/501709/ https://nora.nerc.ac.uk/id/eprint/501709/1/Drews%20et%20al%202013.pdf https://doi.org/10.3189/2013JoG12J134 en eng International Glaciological Society https://nora.nerc.ac.uk/id/eprint/501709/1/Drews%20et%20al%202013.pdf Drews, Reinhard; Martin, Carlos orcid:0000-0002-2661-169X Steinhage, Daniel; Eisen, Olaf. 2013 Characterizing the glaciological conditions at Halvfarryggen ice dome, Dronning Maud Land, Antarctica. Journal of Glaciology, 59 (213). 9-20. https://doi.org/10.3189/2013JoG12J134 <https://doi.org/10.3189/2013JoG12J134> Publication - Article PeerReviewed 2013 ftnerc https://doi.org/10.3189/2013JoG12J134 2023-02-04T19:36:52Z 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 kg m(-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 degrees C to -5 degrees 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. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal Dronning Maud Land ice core Journal of Glaciology Natural Environment Research Council: NERC Open Research Archive Dronning Maud Land Halvfarryggen ENVELOPE(-6.500,-6.500,-71.167,-71.167) Journal of Glaciology 59 213 9 20 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
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 kg m(-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 degrees C to -5 degrees 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. |
format |
Article in Journal/Newspaper |
author |
Drews, Reinhard Martin, Carlos Steinhage, Daniel Eisen, Olaf |
spellingShingle |
Drews, Reinhard Martin, Carlos Steinhage, Daniel Eisen, Olaf Characterizing the glaciological conditions at Halvfarryggen ice dome, Dronning Maud Land, Antarctica |
author_facet |
Drews, Reinhard Martin, 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 |
publisher |
International Glaciological Society |
publishDate |
2013 |
url |
http://nora.nerc.ac.uk/id/eprint/501709/ https://nora.nerc.ac.uk/id/eprint/501709/1/Drews%20et%20al%202013.pdf https://doi.org/10.3189/2013JoG12J134 |
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 Antarctica Journal Dronning Maud Land ice core Journal of Glaciology |
genre_facet |
Antarc* Antarctica Antarctica Journal Dronning Maud Land ice core Journal of Glaciology |
op_relation |
https://nora.nerc.ac.uk/id/eprint/501709/1/Drews%20et%20al%202013.pdf Drews, Reinhard; Martin, Carlos orcid:0000-0002-2661-169X Steinhage, Daniel; Eisen, Olaf. 2013 Characterizing the glaciological conditions at Halvfarryggen ice dome, Dronning Maud Land, Antarctica. Journal of Glaciology, 59 (213). 9-20. https://doi.org/10.3189/2013JoG12J134 <https://doi.org/10.3189/2013JoG12J134> |
op_doi |
https://doi.org/10.3189/2013JoG12J134 |
container_title |
Journal of Glaciology |
container_volume |
59 |
container_issue |
213 |
container_start_page |
9 |
op_container_end_page |
20 |
_version_ |
1766248639249776640 |