A New Velocity Map for Byrd Glacier, East Antarctica, from Sequential Aster Satellite Imagery
New ice-velocity measurements are obtained for the main trunk of Byrd Glacier, East Antarctica, using recently acquired Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) imagery. The velocities are derived from the application of a cross-correlation technique to sequential image...
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ftmaineuniv:oai:digitalcommons.library.umaine.edu:ers_facpub-1122 2023-05-15T13:58:32+02:00 A New Velocity Map for Byrd Glacier, East Antarctica, from Sequential Aster Satellite Imagery Stearns, Leigh Hamilton, Gordon 2005-01-01T08:00:00Z application/pdf https://digitalcommons.library.umaine.edu/ers_facpub/123 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1122&context=ers_facpub unknown DigitalCommons@UMaine https://digitalcommons.library.umaine.edu/ers_facpub/123 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1122&context=ers_facpub This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). Earth Science Faculty Scholarship Earth Sciences text 2005 ftmaineuniv 2023-03-12T18:49:12Z New ice-velocity measurements are obtained for the main trunk of Byrd Glacier, East Antarctica, using recently acquired Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) imagery. The velocities are derived from the application of a cross-correlation technique to sequential images acquired in 2000 and 2001. Images were co-registered and ortho-rectified with the aid of a digital elevation model (DEM) generated from ASTER stereo imagery. This paper outlines the process of DEM generation, image co-registration and correction, and the application of the cross-correlation technique to obtain ice velocities. Comparison of the new velocity map with earlier measurements of velocity from 1978 indicates that the glacier has undergone a substantial deceleration between observations. Portions of the glacier flowing at speeds of similar to 850 m a(-1) in 1978/79 were flowing at similar to 650 m a(-1) in 2000/01. The cause of this change in ice dynamics is not known, but the observation shows that East Antarctic outlet glaciers can undergo substantial changes on relatively short timescales. Text Antarc* Antarctic Antarctica Byrd Glacier East Antarctica The University of Maine: DigitalCommons@UMaine Antarctic East Antarctica Byrd Byrd Glacier ENVELOPE(160.333,160.333,-80.250,-80.250) |
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Open Polar |
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The University of Maine: DigitalCommons@UMaine |
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ftmaineuniv |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Stearns, Leigh Hamilton, Gordon A New Velocity Map for Byrd Glacier, East Antarctica, from Sequential Aster Satellite Imagery |
topic_facet |
Earth Sciences |
description |
New ice-velocity measurements are obtained for the main trunk of Byrd Glacier, East Antarctica, using recently acquired Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) imagery. The velocities are derived from the application of a cross-correlation technique to sequential images acquired in 2000 and 2001. Images were co-registered and ortho-rectified with the aid of a digital elevation model (DEM) generated from ASTER stereo imagery. This paper outlines the process of DEM generation, image co-registration and correction, and the application of the cross-correlation technique to obtain ice velocities. Comparison of the new velocity map with earlier measurements of velocity from 1978 indicates that the glacier has undergone a substantial deceleration between observations. Portions of the glacier flowing at speeds of similar to 850 m a(-1) in 1978/79 were flowing at similar to 650 m a(-1) in 2000/01. The cause of this change in ice dynamics is not known, but the observation shows that East Antarctic outlet glaciers can undergo substantial changes on relatively short timescales. |
format |
Text |
author |
Stearns, Leigh Hamilton, Gordon |
author_facet |
Stearns, Leigh Hamilton, Gordon |
author_sort |
Stearns, Leigh |
title |
A New Velocity Map for Byrd Glacier, East Antarctica, from Sequential Aster Satellite Imagery |
title_short |
A New Velocity Map for Byrd Glacier, East Antarctica, from Sequential Aster Satellite Imagery |
title_full |
A New Velocity Map for Byrd Glacier, East Antarctica, from Sequential Aster Satellite Imagery |
title_fullStr |
A New Velocity Map for Byrd Glacier, East Antarctica, from Sequential Aster Satellite Imagery |
title_full_unstemmed |
A New Velocity Map for Byrd Glacier, East Antarctica, from Sequential Aster Satellite Imagery |
title_sort |
new velocity map for byrd glacier, east antarctica, from sequential aster satellite imagery |
publisher |
DigitalCommons@UMaine |
publishDate |
2005 |
url |
https://digitalcommons.library.umaine.edu/ers_facpub/123 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1122&context=ers_facpub |
long_lat |
ENVELOPE(160.333,160.333,-80.250,-80.250) |
geographic |
Antarctic East Antarctica Byrd Byrd Glacier |
geographic_facet |
Antarctic East Antarctica Byrd Byrd Glacier |
genre |
Antarc* Antarctic Antarctica Byrd Glacier East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Byrd Glacier East Antarctica |
op_source |
Earth Science Faculty Scholarship |
op_relation |
https://digitalcommons.library.umaine.edu/ers_facpub/123 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1122&context=ers_facpub |
op_rights |
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). |
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1766266882726297600 |