Physical Conditions at the Base of a Fast Moving Antarctic Ice Stream
Boreholes drilled to the bottom of ice stream B in the West Antarctic Ice Sheet reveal that the base of the ice stream is at the melting point and the basal water pressure is within about 1.6 bars of the ice overburden pressure. These conditions allow the rapid ice streaming motion to occur by basal...
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American Association for the Advancement of Science
1990
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ftcaltechauth:oai:authors.library.caltech.edu:hdzd9-csc86 2024-09-15T17:43:57+00:00 Physical Conditions at the Base of a Fast Moving Antarctic Ice Stream Engelhardt, Hermann Humphrey, Neil Kamb, Barclay Fahnestock, Mark 1990-04-06 https://doi.org/10.1126/science.248.4951.57 unknown American Association for the Advancement of Science http://www.jstor.org/stable/2874047 https://doi.org/10.1126/science.248.4951.57 oai:authors.library.caltech.edu:hdzd9-csc86 eprintid:46197 resolverid:CaltechAUTHORS:20140611-095003658 info:eu-repo/semantics/closedAccess Other Science, 248(4951), 57-59, (1990-04-06) info:eu-repo/semantics/article 1990 ftcaltechauth https://doi.org/10.1126/science.248.4951.57 2024-08-06T15:35:01Z Boreholes drilled to the bottom of ice stream B in the West Antarctic Ice Sheet reveal that the base of the ice stream is at the melting point and the basal water pressure is within about 1.6 bars of the ice overburden pressure. These conditions allow the rapid ice streaming motion to occur by basal sliding or by shear deformation of unconsolidated sediments that underlie the ice in a layer at least 2 meters thick. The mechanics of ice streaming plays a role in the response of the ice sheet to climatic change. © 1990 American Association for the Advancement of Science. Received 16 November 1989; accepted 30 January 1990. This work was supported by the U.S. National Science Foundation under grant DPP-8519083. We thank R. P. Scherer and H. A. Lowenstam for paleontological information and J. Chadwick, M. Wumkes, J. Berkey, H. Aschmann, M. Blume, H. Conway, S. Duncan, T. Svitek, and J. Zachariasen for help in the field work. Contribution No. 4791, Division of Geological and Planetary Sciences, California Institute of Technology. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Stream B Caltech Authors (California Institute of Technology) Science 248 4951 57 59 |
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Caltech Authors (California Institute of Technology) |
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Boreholes drilled to the bottom of ice stream B in the West Antarctic Ice Sheet reveal that the base of the ice stream is at the melting point and the basal water pressure is within about 1.6 bars of the ice overburden pressure. These conditions allow the rapid ice streaming motion to occur by basal sliding or by shear deformation of unconsolidated sediments that underlie the ice in a layer at least 2 meters thick. The mechanics of ice streaming plays a role in the response of the ice sheet to climatic change. © 1990 American Association for the Advancement of Science. Received 16 November 1989; accepted 30 January 1990. This work was supported by the U.S. National Science Foundation under grant DPP-8519083. We thank R. P. Scherer and H. A. Lowenstam for paleontological information and J. Chadwick, M. Wumkes, J. Berkey, H. Aschmann, M. Blume, H. Conway, S. Duncan, T. Svitek, and J. Zachariasen for help in the field work. Contribution No. 4791, Division of Geological and Planetary Sciences, California Institute of Technology. |
format |
Article in Journal/Newspaper |
author |
Engelhardt, Hermann Humphrey, Neil Kamb, Barclay Fahnestock, Mark |
spellingShingle |
Engelhardt, Hermann Humphrey, Neil Kamb, Barclay Fahnestock, Mark Physical Conditions at the Base of a Fast Moving Antarctic Ice Stream |
author_facet |
Engelhardt, Hermann Humphrey, Neil Kamb, Barclay Fahnestock, Mark |
author_sort |
Engelhardt, Hermann |
title |
Physical Conditions at the Base of a Fast Moving Antarctic Ice Stream |
title_short |
Physical Conditions at the Base of a Fast Moving Antarctic Ice Stream |
title_full |
Physical Conditions at the Base of a Fast Moving Antarctic Ice Stream |
title_fullStr |
Physical Conditions at the Base of a Fast Moving Antarctic Ice Stream |
title_full_unstemmed |
Physical Conditions at the Base of a Fast Moving Antarctic Ice Stream |
title_sort |
physical conditions at the base of a fast moving antarctic ice stream |
publisher |
American Association for the Advancement of Science |
publishDate |
1990 |
url |
https://doi.org/10.1126/science.248.4951.57 |
genre |
Antarc* Antarctic Ice Sheet Ice Stream B |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Stream B |
op_source |
Science, 248(4951), 57-59, (1990-04-06) |
op_relation |
http://www.jstor.org/stable/2874047 https://doi.org/10.1126/science.248.4951.57 oai:authors.library.caltech.edu:hdzd9-csc86 eprintid:46197 resolverid:CaltechAUTHORS:20140611-095003658 |
op_rights |
info:eu-repo/semantics/closedAccess Other |
op_doi |
https://doi.org/10.1126/science.248.4951.57 |
container_title |
Science |
container_volume |
248 |
container_issue |
4951 |
container_start_page |
57 |
op_container_end_page |
59 |
_version_ |
1810491178966056960 |