Identification and characterization of alpine subglacial lakes using interferometric synthetic aperture radar (InSAR): Brady Glacier, Alaska, USA
The temporary storage and subsequent release of water at glacial margins can cause severe flooding in downstream areas and substantially impact glacier dynamics. Alpine subglacial lakes may not be identified until they become subaerially exposed or release a jökulhlaup. We use interferometric synthe...
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ftuniwashingtaco:oai:digitalcommons.tacoma.uw.edu:ias_pub-1331 2023-09-05T13:19:35+02:00 Identification and characterization of alpine subglacial lakes using interferometric synthetic aperture radar (InSAR): Brady Glacier, Alaska, USA Capps, Denny M. Rabus, Bernhard Clague, John J. Shugar, Dan H. 2010-12-01T08:00:00Z https://digitalcommons.tacoma.uw.edu/ias_pub/332 https://doi.org/10.3189/002214310794457254 http://www.sfu.ca/cnhr/papers/Capps%20et%20al.%20Journal%20of%20Glaciology%202010.pdf unknown UW Tacoma Digital Commons https://digitalcommons.tacoma.uw.edu/ias_pub/332 doi:10.3189/002214310794457254 http://www.sfu.ca/cnhr/papers/Capps%20et%20al.%20Journal%20of%20Glaciology%202010.pdf SIAS Faculty Publications text 2010 ftuniwashingtaco https://doi.org/10.3189/002214310794457254 2023-08-21T14:13:55Z The temporary storage and subsequent release of water at glacial margins can cause severe flooding in downstream areas and substantially impact glacier dynamics. Alpine subglacial lakes may not be identified until they become subaerially exposed or release a jökulhlaup. We use interferometric synthetic aperture radar (InSAR) to identify and characterize three dynamic alpine subglacial lakes of Brady Glacier, Alaska, USA. We quantify changes in vertical displacement of the glacier surface and lake volumes from September 1995 through March 1996 using European Remote-sensing Satellite-1/-2 (ERS-1/-2) tandem data. In the autumn, subsidence ranged from 4 to 26 cm d−1 and the volume of water discharged ranged from 22 000±2000 to 243 000±14 000 m3d−1. Subsidence and discharge rates declined significantly during the winter and continued at a lesser rate through March. Application of this technique may allow researchers to locate alpine subglacial lakes years or decades before they begin to release hazardous outburst floods and substantially impact glacier dynamics. Text glacier Alaska University of Washington: UW Tacoma Digital Commons Journal of Glaciology 56 199 861 870 |
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Open Polar |
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University of Washington: UW Tacoma Digital Commons |
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ftuniwashingtaco |
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The temporary storage and subsequent release of water at glacial margins can cause severe flooding in downstream areas and substantially impact glacier dynamics. Alpine subglacial lakes may not be identified until they become subaerially exposed or release a jökulhlaup. We use interferometric synthetic aperture radar (InSAR) to identify and characterize three dynamic alpine subglacial lakes of Brady Glacier, Alaska, USA. We quantify changes in vertical displacement of the glacier surface and lake volumes from September 1995 through March 1996 using European Remote-sensing Satellite-1/-2 (ERS-1/-2) tandem data. In the autumn, subsidence ranged from 4 to 26 cm d−1 and the volume of water discharged ranged from 22 000±2000 to 243 000±14 000 m3d−1. Subsidence and discharge rates declined significantly during the winter and continued at a lesser rate through March. Application of this technique may allow researchers to locate alpine subglacial lakes years or decades before they begin to release hazardous outburst floods and substantially impact glacier dynamics. |
format |
Text |
author |
Capps, Denny M. Rabus, Bernhard Clague, John J. Shugar, Dan H. |
spellingShingle |
Capps, Denny M. Rabus, Bernhard Clague, John J. Shugar, Dan H. Identification and characterization of alpine subglacial lakes using interferometric synthetic aperture radar (InSAR): Brady Glacier, Alaska, USA |
author_facet |
Capps, Denny M. Rabus, Bernhard Clague, John J. Shugar, Dan H. |
author_sort |
Capps, Denny M. |
title |
Identification and characterization of alpine subglacial lakes using interferometric synthetic aperture radar (InSAR): Brady Glacier, Alaska, USA |
title_short |
Identification and characterization of alpine subglacial lakes using interferometric synthetic aperture radar (InSAR): Brady Glacier, Alaska, USA |
title_full |
Identification and characterization of alpine subglacial lakes using interferometric synthetic aperture radar (InSAR): Brady Glacier, Alaska, USA |
title_fullStr |
Identification and characterization of alpine subglacial lakes using interferometric synthetic aperture radar (InSAR): Brady Glacier, Alaska, USA |
title_full_unstemmed |
Identification and characterization of alpine subglacial lakes using interferometric synthetic aperture radar (InSAR): Brady Glacier, Alaska, USA |
title_sort |
identification and characterization of alpine subglacial lakes using interferometric synthetic aperture radar (insar): brady glacier, alaska, usa |
publisher |
UW Tacoma Digital Commons |
publishDate |
2010 |
url |
https://digitalcommons.tacoma.uw.edu/ias_pub/332 https://doi.org/10.3189/002214310794457254 http://www.sfu.ca/cnhr/papers/Capps%20et%20al.%20Journal%20of%20Glaciology%202010.pdf |
genre |
glacier Alaska |
genre_facet |
glacier Alaska |
op_source |
SIAS Faculty Publications |
op_relation |
https://digitalcommons.tacoma.uw.edu/ias_pub/332 doi:10.3189/002214310794457254 http://www.sfu.ca/cnhr/papers/Capps%20et%20al.%20Journal%20of%20Glaciology%202010.pdf |
op_doi |
https://doi.org/10.3189/002214310794457254 |
container_title |
Journal of Glaciology |
container_volume |
56 |
container_issue |
199 |
container_start_page |
861 |
op_container_end_page |
870 |
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1776200375952474112 |