Episodic propagation of a rift on the Amery Ice Shelf, East Antarctica
[1] We investigate ice shelf rift propagation using a combination of GPS and seismic measurements near the tip of an active rift in the Amery Ice Shelf. These measurements reveal that propagation occurs in episodic bursts, which were identified based on swarms of seismicity accompanied by rapid rift...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.468.1381 2023-05-15T13:22:00+02:00 Episodic propagation of a rift on the Amery Ice Shelf, East Antarctica J. N. Bassis R. Coleman H. A. Fricker J. B. Minster The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.1381 http://aosshost.engin.umich.edu/faculty/bassis/content/papers/Bassis_GRL_2004.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.1381 http://aosshost.engin.umich.edu/faculty/bassis/content/papers/Bassis_GRL_2004.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://aosshost.engin.umich.edu/faculty/bassis/content/papers/Bassis_GRL_2004.pdf text ftciteseerx 2016-01-08T07:03:11Z [1] We investigate ice shelf rift propagation using a combination of GPS and seismic measurements near the tip of an active rift in the Amery Ice Shelf. These measurements reveal that propagation occurs in episodic bursts, which were identified based on swarms of seismicity accompanied by rapid rift widening. The bursts last approximately 4 hours and are separated by 10–24 days. In between bursts, the rift widens at a rate comparable to that of ice shelf spreading. Comparison of automatic weather station data and tidal amplitudes show that the propagation bursts are not directly triggered by winds or tides, suggesting that rift propagation is driven by the background glaciological stress in the ice shelf. We show that the ice debris that partly fills the rift may play a role in controlling the rate of propagation. Citation: Bassis, J. N. Text Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Shelf Unknown Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) East Antarctica |
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Open Polar |
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Unknown |
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ftciteseerx |
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English |
description |
[1] We investigate ice shelf rift propagation using a combination of GPS and seismic measurements near the tip of an active rift in the Amery Ice Shelf. These measurements reveal that propagation occurs in episodic bursts, which were identified based on swarms of seismicity accompanied by rapid rift widening. The bursts last approximately 4 hours and are separated by 10–24 days. In between bursts, the rift widens at a rate comparable to that of ice shelf spreading. Comparison of automatic weather station data and tidal amplitudes show that the propagation bursts are not directly triggered by winds or tides, suggesting that rift propagation is driven by the background glaciological stress in the ice shelf. We show that the ice debris that partly fills the rift may play a role in controlling the rate of propagation. Citation: Bassis, J. N. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
J. N. Bassis R. Coleman H. A. Fricker J. B. Minster |
spellingShingle |
J. N. Bassis R. Coleman H. A. Fricker J. B. Minster Episodic propagation of a rift on the Amery Ice Shelf, East Antarctica |
author_facet |
J. N. Bassis R. Coleman H. A. Fricker J. B. Minster |
author_sort |
J. N. Bassis |
title |
Episodic propagation of a rift on the Amery Ice Shelf, East Antarctica |
title_short |
Episodic propagation of a rift on the Amery Ice Shelf, East Antarctica |
title_full |
Episodic propagation of a rift on the Amery Ice Shelf, East Antarctica |
title_fullStr |
Episodic propagation of a rift on the Amery Ice Shelf, East Antarctica |
title_full_unstemmed |
Episodic propagation of a rift on the Amery Ice Shelf, East Antarctica |
title_sort |
episodic propagation of a rift on the amery ice shelf, east antarctica |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.1381 http://aosshost.engin.umich.edu/faculty/bassis/content/papers/Bassis_GRL_2004.pdf |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) |
geographic |
Amery Amery Ice Shelf East Antarctica |
geographic_facet |
Amery Amery Ice Shelf East Antarctica |
genre |
Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Shelf |
genre_facet |
Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Shelf |
op_source |
http://aosshost.engin.umich.edu/faculty/bassis/content/papers/Bassis_GRL_2004.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.1381 http://aosshost.engin.umich.edu/faculty/bassis/content/papers/Bassis_GRL_2004.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766362739101401088 |