Changes in the configuration of ice stream flow from the West Antarctic ice sheet
Surface-based ice-penetrating radar profiles on the northeast flank of Siple Dome support the hypothesis that a curvilinear scar first observed in AVHRR satellite imagery represents the margin of a formerly active ice stream. The scar defines the southwestern boundary of an ice stream flowing from i...
Main Authors: | , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1996
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.367.1369 http://www.stolaf.edu/other/cegsic/publications/SIPDOM_paper.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.367.1369 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.367.1369 2023-05-15T13:56:12+02:00 Changes in the configuration of ice stream flow from the West Antarctic ice sheet Robert W. Jacobel Theodore A. Scambos Charles R. Raymond Anthony M. Gades The Pennsylvania State University CiteSeerX Archives 1996 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.367.1369 http://www.stolaf.edu/other/cegsic/publications/SIPDOM_paper.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.367.1369 http://www.stolaf.edu/other/cegsic/publications/SIPDOM_paper.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.stolaf.edu/other/cegsic/publications/SIPDOM_paper.pdf text 1996 ftciteseerx 2016-01-08T01:05:50Z Surface-based ice-penetrating radar profiles on the northeast flank of Siple Dome support the hypothesis that a curvilinear scar first observed in AVHRR satellite imagery represents the margin of a formerly active ice stream. The scar defines the southwestern boundary of an ice stream flowing from ice stream C to ice stream D, close to where it enters the Ross Ice Shelf. Our studies show that the scar coincides with a trough and upward step in surface topography approximately 5 kilometers across, underlain by a zone of disturbed internal stratigraphy revealed by the radar. Burial depth of the disturbed zone enables us to calculate the time of shut-down as occurring prior to approximately 1.3 KYBP. The configuration of the ice streams draining the West Antarctic Ice Sheet into the Ross Ice Shelf evidently changes with time, and attempts to predict the evolution of the ice sheet must incorporate this observation. Text Antarc* Antarctic Ice Sheet Ice Shelf Ice Stream C Ice Stream D Ross Ice Shelf Unknown Antarctic West Antarctic Ice Sheet Ross Ice Shelf Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Dome ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Surface-based ice-penetrating radar profiles on the northeast flank of Siple Dome support the hypothesis that a curvilinear scar first observed in AVHRR satellite imagery represents the margin of a formerly active ice stream. The scar defines the southwestern boundary of an ice stream flowing from ice stream C to ice stream D, close to where it enters the Ross Ice Shelf. Our studies show that the scar coincides with a trough and upward step in surface topography approximately 5 kilometers across, underlain by a zone of disturbed internal stratigraphy revealed by the radar. Burial depth of the disturbed zone enables us to calculate the time of shut-down as occurring prior to approximately 1.3 KYBP. The configuration of the ice streams draining the West Antarctic Ice Sheet into the Ross Ice Shelf evidently changes with time, and attempts to predict the evolution of the ice sheet must incorporate this observation. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Robert W. Jacobel Theodore A. Scambos Charles R. Raymond Anthony M. Gades |
spellingShingle |
Robert W. Jacobel Theodore A. Scambos Charles R. Raymond Anthony M. Gades Changes in the configuration of ice stream flow from the West Antarctic ice sheet |
author_facet |
Robert W. Jacobel Theodore A. Scambos Charles R. Raymond Anthony M. Gades |
author_sort |
Robert W. Jacobel |
title |
Changes in the configuration of ice stream flow from the West Antarctic ice sheet |
title_short |
Changes in the configuration of ice stream flow from the West Antarctic ice sheet |
title_full |
Changes in the configuration of ice stream flow from the West Antarctic ice sheet |
title_fullStr |
Changes in the configuration of ice stream flow from the West Antarctic ice sheet |
title_full_unstemmed |
Changes in the configuration of ice stream flow from the West Antarctic ice sheet |
title_sort |
changes in the configuration of ice stream flow from the west antarctic ice sheet |
publishDate |
1996 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.367.1369 http://www.stolaf.edu/other/cegsic/publications/SIPDOM_paper.pdf |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
geographic |
Antarctic West Antarctic Ice Sheet Ross Ice Shelf Siple Siple Dome |
geographic_facet |
Antarctic West Antarctic Ice Sheet Ross Ice Shelf Siple Siple Dome |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Stream C Ice Stream D Ross Ice Shelf |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Stream C Ice Stream D Ross Ice Shelf |
op_source |
http://www.stolaf.edu/other/cegsic/publications/SIPDOM_paper.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.367.1369 http://www.stolaf.edu/other/cegsic/publications/SIPDOM_paper.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766263568448094208 |