Geometry, motion and mass balance of Dyer Plateau, Antarctica
Geodetic surveying and ground-based radar profiling were used to determine geometry and surface motion of the ice sheet on the Dyer Plateau, Antarctica, in the vicinity of an ice-core site on a local dome. Vertical strain measurements in the core hole constrain the depth profile of vertical velocity...
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International Glaciological Society
1996
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ftnerc:oai:nora.nerc.ac.uk:515264 2023-05-15T13:49:33+02:00 Geometry, motion and mass balance of Dyer Plateau, Antarctica Raymond, Charles F. Weertman, Bruce R. Thompson, Lonnie G. Mosley-Thompson, Ellen Peel, David A. Mulvaney, Robert 1996 http://nora.nerc.ac.uk/id/eprint/515264/ http://www.ingentaconnect.com/contentone/igsoc/jog/1996/00000042/00000142/art00012 unknown International Glaciological Society Raymond, Charles F.; Weertman, Bruce R.; Thompson, Lonnie G.; Mosley-Thompson, Ellen; Peel, David A.; Mulvaney, Robert orcid:0000-0002-5372-8148 . 1996 Geometry, motion and mass balance of Dyer Plateau, Antarctica. Journal of Glaciology, 42 (142). 510-518. https://doi.org/10.3198/1996JoG42-142-510-518 <https://doi.org/10.3198/1996JoG42-142-510-518> Publication - Article PeerReviewed 1996 ftnerc https://doi.org/10.3198/1996JoG42-142-510-518 2023-02-04T19:43:55Z Geodetic surveying and ground-based radar profiling were used to determine geometry and surface motion of the ice sheet on the Dyer Plateau, Antarctica, in the vicinity of an ice-core site on a local dome. Vertical strain measurements in the core hole constrain the depth profile of vertical velocity. These geophysical measurements are used to analyze the profiles of density and annual layer thickness measured on the ice core to estimate the current mass balance of the ice column and the past history of accumulation rate. Consideration of horizontal and vertical mass-flow divergence shows that the profiles of density and vertical velocity are not fully consistent with steady state. Mean density of the firn layer appears to be increasing, which leads to the deduction of a small rate of mass increase (≈ 0.02 m a− 1 ice-equivalent thickness). Over the last 200a there has been a gradual increase in accumulation rate from about 0.46 m a− 1 to 0.54 m a− 1 ice-equivalent thickness in recent time. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal ice core Ice Sheet Journal of Glaciology Natural Environment Research Council: NERC Open Research Archive Dyer ENVELOPE(-81.366,-81.366,50.550,50.550) Dyer Plateau ENVELOPE(-65.000,-65.000,-70.500,-70.500) |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
Geodetic surveying and ground-based radar profiling were used to determine geometry and surface motion of the ice sheet on the Dyer Plateau, Antarctica, in the vicinity of an ice-core site on a local dome. Vertical strain measurements in the core hole constrain the depth profile of vertical velocity. These geophysical measurements are used to analyze the profiles of density and annual layer thickness measured on the ice core to estimate the current mass balance of the ice column and the past history of accumulation rate. Consideration of horizontal and vertical mass-flow divergence shows that the profiles of density and vertical velocity are not fully consistent with steady state. Mean density of the firn layer appears to be increasing, which leads to the deduction of a small rate of mass increase (≈ 0.02 m a− 1 ice-equivalent thickness). Over the last 200a there has been a gradual increase in accumulation rate from about 0.46 m a− 1 to 0.54 m a− 1 ice-equivalent thickness in recent time. |
format |
Article in Journal/Newspaper |
author |
Raymond, Charles F. Weertman, Bruce R. Thompson, Lonnie G. Mosley-Thompson, Ellen Peel, David A. Mulvaney, Robert |
spellingShingle |
Raymond, Charles F. Weertman, Bruce R. Thompson, Lonnie G. Mosley-Thompson, Ellen Peel, David A. Mulvaney, Robert Geometry, motion and mass balance of Dyer Plateau, Antarctica |
author_facet |
Raymond, Charles F. Weertman, Bruce R. Thompson, Lonnie G. Mosley-Thompson, Ellen Peel, David A. Mulvaney, Robert |
author_sort |
Raymond, Charles F. |
title |
Geometry, motion and mass balance of Dyer Plateau, Antarctica |
title_short |
Geometry, motion and mass balance of Dyer Plateau, Antarctica |
title_full |
Geometry, motion and mass balance of Dyer Plateau, Antarctica |
title_fullStr |
Geometry, motion and mass balance of Dyer Plateau, Antarctica |
title_full_unstemmed |
Geometry, motion and mass balance of Dyer Plateau, Antarctica |
title_sort |
geometry, motion and mass balance of dyer plateau, antarctica |
publisher |
International Glaciological Society |
publishDate |
1996 |
url |
http://nora.nerc.ac.uk/id/eprint/515264/ http://www.ingentaconnect.com/contentone/igsoc/jog/1996/00000042/00000142/art00012 |
long_lat |
ENVELOPE(-81.366,-81.366,50.550,50.550) ENVELOPE(-65.000,-65.000,-70.500,-70.500) |
geographic |
Dyer Dyer Plateau |
geographic_facet |
Dyer Dyer Plateau |
genre |
Antarc* Antarctica Antarctica Journal ice core Ice Sheet Journal of Glaciology |
genre_facet |
Antarc* Antarctica Antarctica Journal ice core Ice Sheet Journal of Glaciology |
op_relation |
Raymond, Charles F.; Weertman, Bruce R.; Thompson, Lonnie G.; Mosley-Thompson, Ellen; Peel, David A.; Mulvaney, Robert orcid:0000-0002-5372-8148 . 1996 Geometry, motion and mass balance of Dyer Plateau, Antarctica. Journal of Glaciology, 42 (142). 510-518. https://doi.org/10.3198/1996JoG42-142-510-518 <https://doi.org/10.3198/1996JoG42-142-510-518> |
op_doi |
https://doi.org/10.3198/1996JoG42-142-510-518 |
_version_ |
1766251596158599168 |