Strain rate distribution on an active ice shelf rift derived by GPS
The majority of mass lost from the Antarctic ice sheet takes place at the fringing ice shelves via iceberg calving. Iceberg calving is controlled by the initiation and propagation of large scale rifts (fractures that penetrate through the entire ice shelf thickness), which precede large tabular iceb...
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ftunivtasecite:oai:ecite.utas.edu.au:50707 2023-05-15T13:22:07+02:00 Strain rate distribution on an active ice shelf rift derived by GPS Janssen, V Coleman, R 2007 application/pdf http://www.agu.org/meetings/fm07/ http://ecite.utas.edu.au/50707 en eng American Geophysical Union http://ecite.utas.edu.au/50707/1/50707 - Strain rate distribution on an active ice shelf rift derived by GPS.pdf Janssen, V and Coleman, R, Strain rate distribution on an active ice shelf rift derived by GPS, 2007 American Geophysical Union Fall Meeting Program & Abstracts, 10-14 December, San Francisco (2007) [Conference Extract] http://ecite.utas.edu.au/50707 Engineering Geomatic Engineering Geodesy Conference Extract NonPeerReviewed 2007 ftunivtasecite 2019-12-13T21:24:56Z The majority of mass lost from the Antarctic ice sheet takes place at the fringing ice shelves via iceberg calving. Iceberg calving is controlled by the initiation and propagation of large scale rifts (fractures that penetrate through the entire ice shelf thickness), which precede large tabular iceberg detachment and can lead to ice shelf break- up. Our study area is the Amery Ice Shelf, East Antarctica, where we have observed over the past 5 Antarctic summer seasons an active rift system using a network of GPS and seismic stations. Here we report on the analysis of some of the GPS measurements. Strain rates are determined for a network of 11 sites observed over three weeks during the 2004/05 Antarctic summer period. In order to investigate possible changes in rift fracture mechanics, the results are combined with, and compared to, strain rates obtained in the 2002/03 season, when a sparser 6-station network was deployed for 46 days. Analysis of the network using a cumulative sum approach, obtained by differencing a pair of residual baseline time series situated approximately normal and parallel to the rift, is found to be an effective method to detect small baseline length changes. Conference Object Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Iceberg* eCite UTAS (University of Tasmania) Antarctic The Antarctic East Antarctica Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Engineering Geomatic Engineering Geodesy |
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Engineering Geomatic Engineering Geodesy Janssen, V Coleman, R Strain rate distribution on an active ice shelf rift derived by GPS |
topic_facet |
Engineering Geomatic Engineering Geodesy |
description |
The majority of mass lost from the Antarctic ice sheet takes place at the fringing ice shelves via iceberg calving. Iceberg calving is controlled by the initiation and propagation of large scale rifts (fractures that penetrate through the entire ice shelf thickness), which precede large tabular iceberg detachment and can lead to ice shelf break- up. Our study area is the Amery Ice Shelf, East Antarctica, where we have observed over the past 5 Antarctic summer seasons an active rift system using a network of GPS and seismic stations. Here we report on the analysis of some of the GPS measurements. Strain rates are determined for a network of 11 sites observed over three weeks during the 2004/05 Antarctic summer period. In order to investigate possible changes in rift fracture mechanics, the results are combined with, and compared to, strain rates obtained in the 2002/03 season, when a sparser 6-station network was deployed for 46 days. Analysis of the network using a cumulative sum approach, obtained by differencing a pair of residual baseline time series situated approximately normal and parallel to the rift, is found to be an effective method to detect small baseline length changes. |
format |
Conference Object |
author |
Janssen, V Coleman, R |
author_facet |
Janssen, V Coleman, R |
author_sort |
Janssen, V |
title |
Strain rate distribution on an active ice shelf rift derived by GPS |
title_short |
Strain rate distribution on an active ice shelf rift derived by GPS |
title_full |
Strain rate distribution on an active ice shelf rift derived by GPS |
title_fullStr |
Strain rate distribution on an active ice shelf rift derived by GPS |
title_full_unstemmed |
Strain rate distribution on an active ice shelf rift derived by GPS |
title_sort |
strain rate distribution on an active ice shelf rift derived by gps |
publisher |
American Geophysical Union |
publishDate |
2007 |
url |
http://www.agu.org/meetings/fm07/ http://ecite.utas.edu.au/50707 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) |
geographic |
Antarctic The Antarctic East Antarctica Amery Amery Ice Shelf |
geographic_facet |
Antarctic The Antarctic East Antarctica Amery Amery Ice Shelf |
genre |
Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Iceberg* |
genre_facet |
Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Iceberg* |
op_relation |
http://ecite.utas.edu.au/50707/1/50707 - Strain rate distribution on an active ice shelf rift derived by GPS.pdf Janssen, V and Coleman, R, Strain rate distribution on an active ice shelf rift derived by GPS, 2007 American Geophysical Union Fall Meeting Program & Abstracts, 10-14 December, San Francisco (2007) [Conference Extract] http://ecite.utas.edu.au/50707 |
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1766363365003755520 |