Analysis of velocity field, mass balance, and basal melt of the Lambert glacier-amery ice shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements
By incorporating recently available remote sensing data, we investigated the mass balance for all individual tributary glacial basins of the Lambert Glacier-Amery Ice Shelf system, East Antarctica. On the basis of the ice flow information derived from SAR interferometry and ICESat laser altimetry, w...
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2010
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Online Access: | https://doi.org/10.1029/2010JB007456 http://ecite.utas.edu.au/73340 |
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ftunivtasecite:oai:ecite.utas.edu.au:73340 2023-05-15T13:21:59+02:00 Analysis of velocity field, mass balance, and basal melt of the Lambert glacier-amery ice shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements Yu, J Liu, H Jezek, KC Warner, RC Wen, J 2010 application/pdf https://doi.org/10.1029/2010JB007456 http://ecite.utas.edu.au/73340 en eng American Geophysical Union http://ecite.utas.edu.au/73340/1/2010_Yu_etal_Analysis_of_Lambert-Amery_velocities_mass_balance_and_basal_melting_JGR.pdf http://dx.doi.org/10.1029/2010JB007456 Yu, J and Liu, H and Jezek, KC and Warner, RC and Wen, J, Analysis of velocity field, mass balance, and basal melt of the Lambert glacier-amery ice shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements, Journal of Geophysical Research B: Solid Earth, 115, (B11) pp. 1-16. ISSN 0148-0227 (2010) [Refereed Article] http://ecite.utas.edu.au/73340 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2010 ftunivtasecite https://doi.org/10.1029/2010JB007456 2019-12-13T21:40:26Z By incorporating recently available remote sensing data, we investigated the mass balance for all individual tributary glacial basins of the Lambert Glacier-Amery Ice Shelf system, East Antarctica. On the basis of the ice flow information derived from SAR interferometry and ICESat laser altimetry, we have determined the spatial configuration of eight tributary drainage basins of the Lambert-Amery glacial system. By combining the coherence information from SAR interferometry and the texture information from SAR and MODIS images, we have interpreted and refined the grounding line position. We calculated ice volume flux of each tributary glacial basin based on the ice velocity field derived from Radarsat three-pass interferometry together with ice thickness data interpolated from Australian and Russian airborne radio echo sounding (RES) surveys and inferred from ICESat laser altimetry data. Our analysis reveals that three tributary basins have a significant net positive imbalance, while five other subbasins are slightly positive or close to zero balance. Overall, in contrast to previous studies, we find that the grounded ice in Lambert Glacier-Amery Ice Shelf system has a positive mass imbalance of 22.9 4.4 Gt a -1 . The net basal melting for the entire Amery Ice Shelf is estimated to be 27.0 7.0 Gt a -1 . The melting rate decreases rapidly from the grounding zone to the ice shelf front. Significant basal refreezing is detected in the downstream section of the ice shelf. The mass balance estimates for both the grounded ice sheet and the ice shelf mass differ substantially from other recent estimates. Article in Journal/Newspaper Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Sheet Ice Shelf Lambert Glacier eCite UTAS (University of Tasmania) Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) East Antarctica Lambert Glacier ENVELOPE(67.490,67.490,-73.065,-73.065) Journal of Geophysical Research 115 B11 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology Yu, J Liu, H Jezek, KC Warner, RC Wen, J Analysis of velocity field, mass balance, and basal melt of the Lambert glacier-amery ice shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
By incorporating recently available remote sensing data, we investigated the mass balance for all individual tributary glacial basins of the Lambert Glacier-Amery Ice Shelf system, East Antarctica. On the basis of the ice flow information derived from SAR interferometry and ICESat laser altimetry, we have determined the spatial configuration of eight tributary drainage basins of the Lambert-Amery glacial system. By combining the coherence information from SAR interferometry and the texture information from SAR and MODIS images, we have interpreted and refined the grounding line position. We calculated ice volume flux of each tributary glacial basin based on the ice velocity field derived from Radarsat three-pass interferometry together with ice thickness data interpolated from Australian and Russian airborne radio echo sounding (RES) surveys and inferred from ICESat laser altimetry data. Our analysis reveals that three tributary basins have a significant net positive imbalance, while five other subbasins are slightly positive or close to zero balance. Overall, in contrast to previous studies, we find that the grounded ice in Lambert Glacier-Amery Ice Shelf system has a positive mass imbalance of 22.9 4.4 Gt a -1 . The net basal melting for the entire Amery Ice Shelf is estimated to be 27.0 7.0 Gt a -1 . The melting rate decreases rapidly from the grounding zone to the ice shelf front. Significant basal refreezing is detected in the downstream section of the ice shelf. The mass balance estimates for both the grounded ice sheet and the ice shelf mass differ substantially from other recent estimates. |
format |
Article in Journal/Newspaper |
author |
Yu, J Liu, H Jezek, KC Warner, RC Wen, J |
author_facet |
Yu, J Liu, H Jezek, KC Warner, RC Wen, J |
author_sort |
Yu, J |
title |
Analysis of velocity field, mass balance, and basal melt of the Lambert glacier-amery ice shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements |
title_short |
Analysis of velocity field, mass balance, and basal melt of the Lambert glacier-amery ice shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements |
title_full |
Analysis of velocity field, mass balance, and basal melt of the Lambert glacier-amery ice shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements |
title_fullStr |
Analysis of velocity field, mass balance, and basal melt of the Lambert glacier-amery ice shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements |
title_full_unstemmed |
Analysis of velocity field, mass balance, and basal melt of the Lambert glacier-amery ice shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements |
title_sort |
analysis of velocity field, mass balance, and basal melt of the lambert glacier-amery ice shelf system by incorporating radarsat sar interferometry and icesat laser altimetry measurements |
publisher |
American Geophysical Union |
publishDate |
2010 |
url |
https://doi.org/10.1029/2010JB007456 http://ecite.utas.edu.au/73340 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) ENVELOPE(67.490,67.490,-73.065,-73.065) |
geographic |
Amery Amery Ice Shelf East Antarctica Lambert Glacier |
geographic_facet |
Amery Amery Ice Shelf East Antarctica Lambert Glacier |
genre |
Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Sheet Ice Shelf Lambert Glacier |
genre_facet |
Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Sheet Ice Shelf Lambert Glacier |
op_relation |
http://ecite.utas.edu.au/73340/1/2010_Yu_etal_Analysis_of_Lambert-Amery_velocities_mass_balance_and_basal_melting_JGR.pdf http://dx.doi.org/10.1029/2010JB007456 Yu, J and Liu, H and Jezek, KC and Warner, RC and Wen, J, Analysis of velocity field, mass balance, and basal melt of the Lambert glacier-amery ice shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements, Journal of Geophysical Research B: Solid Earth, 115, (B11) pp. 1-16. ISSN 0148-0227 (2010) [Refereed Article] http://ecite.utas.edu.au/73340 |
op_doi |
https://doi.org/10.1029/2010JB007456 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
container_issue |
B11 |
_version_ |
1766362609545641984 |