High-resolution bed topography mapping of Russell Glacier, Greenland, inferred from Operation IceBridge data
Detailed maps of bed elevation and ice thickness are essential for understanding and projecting the evolution of the ice sheets. Such maps are traditionally obtained using airborne radarsounding profiler data interpolated onto regular grids using geostatistical tools such as kriging. Here we compare...
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ftcdlib:oai:escholarship.org/ark:/13030/qt2pp1r122 2023-05-15T16:21:18+02:00 High-resolution bed topography mapping of Russell Glacier, Greenland, inferred from Operation IceBridge data Morlighem, M Rignot, E Mouginot, J Wu, X Seroussi, H Larour, E Paden, J 1015 - 1023 2013-12-01 application/pdf https://escholarship.org/uc/item/2pp1r122 unknown eScholarship, University of California qt2pp1r122 https://escholarship.org/uc/item/2pp1r122 CC-BY CC-BY Journal of Glaciology, vol 59, iss 218 Meteorology & Atmospheric Sciences Physical Geography and Environmental Geoscience article 2013 ftcdlib 2021-06-20T14:23:08Z Detailed maps of bed elevation and ice thickness are essential for understanding and projecting the evolution of the ice sheets. Such maps are traditionally obtained using airborne radarsounding profiler data interpolated onto regular grids using geostatistical tools such as kriging. Here we compare three mapping techniques applied to a dense radar survey of Russell Glacier, West Greenland, by NASA Operation IceBridge: (1) radar tomography (RT) processing of the radar data to map the bed elevation, (2) interpolation of radar-derived thickness by ordinary kriging (KR) and (3) reconstruction of ice thickness based on the principles of mass conservation (MC) combining radar-sounding profiler and ice motion data. RT eliminates ambiguities caused by off-nadir reflections, but is spatially limited. KR yields a standard error in bed elevation of 35 m, but large errors (>300m a-1) in flux divergence when combined with ice motion data. MC yields a comparable performance in bed elevation mapping, and errors smaller than 1m a-1 in flux divergence. When the number of radar-sounding tracks is reduced, the performance of KR decreases more rapidly than for MC. Our study site shows that MC is capable of maintaining precision levels of 60m at 400m posting with flight tracks separated by 5 km. © 2014 Publishing Technology. Article in Journal/Newspaper glacier Greenland Journal of Glaciology University of California: eScholarship Greenland |
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Open Polar |
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University of California: eScholarship |
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Meteorology & Atmospheric Sciences Physical Geography and Environmental Geoscience |
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Meteorology & Atmospheric Sciences Physical Geography and Environmental Geoscience Morlighem, M Rignot, E Mouginot, J Wu, X Seroussi, H Larour, E Paden, J High-resolution bed topography mapping of Russell Glacier, Greenland, inferred from Operation IceBridge data |
topic_facet |
Meteorology & Atmospheric Sciences Physical Geography and Environmental Geoscience |
description |
Detailed maps of bed elevation and ice thickness are essential for understanding and projecting the evolution of the ice sheets. Such maps are traditionally obtained using airborne radarsounding profiler data interpolated onto regular grids using geostatistical tools such as kriging. Here we compare three mapping techniques applied to a dense radar survey of Russell Glacier, West Greenland, by NASA Operation IceBridge: (1) radar tomography (RT) processing of the radar data to map the bed elevation, (2) interpolation of radar-derived thickness by ordinary kriging (KR) and (3) reconstruction of ice thickness based on the principles of mass conservation (MC) combining radar-sounding profiler and ice motion data. RT eliminates ambiguities caused by off-nadir reflections, but is spatially limited. KR yields a standard error in bed elevation of 35 m, but large errors (>300m a-1) in flux divergence when combined with ice motion data. MC yields a comparable performance in bed elevation mapping, and errors smaller than 1m a-1 in flux divergence. When the number of radar-sounding tracks is reduced, the performance of KR decreases more rapidly than for MC. Our study site shows that MC is capable of maintaining precision levels of 60m at 400m posting with flight tracks separated by 5 km. © 2014 Publishing Technology. |
format |
Article in Journal/Newspaper |
author |
Morlighem, M Rignot, E Mouginot, J Wu, X Seroussi, H Larour, E Paden, J |
author_facet |
Morlighem, M Rignot, E Mouginot, J Wu, X Seroussi, H Larour, E Paden, J |
author_sort |
Morlighem, M |
title |
High-resolution bed topography mapping of Russell Glacier, Greenland, inferred from Operation IceBridge data |
title_short |
High-resolution bed topography mapping of Russell Glacier, Greenland, inferred from Operation IceBridge data |
title_full |
High-resolution bed topography mapping of Russell Glacier, Greenland, inferred from Operation IceBridge data |
title_fullStr |
High-resolution bed topography mapping of Russell Glacier, Greenland, inferred from Operation IceBridge data |
title_full_unstemmed |
High-resolution bed topography mapping of Russell Glacier, Greenland, inferred from Operation IceBridge data |
title_sort |
high-resolution bed topography mapping of russell glacier, greenland, inferred from operation icebridge data |
publisher |
eScholarship, University of California |
publishDate |
2013 |
url |
https://escholarship.org/uc/item/2pp1r122 |
op_coverage |
1015 - 1023 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Journal of Glaciology |
genre_facet |
glacier Greenland Journal of Glaciology |
op_source |
Journal of Glaciology, vol 59, iss 218 |
op_relation |
qt2pp1r122 https://escholarship.org/uc/item/2pp1r122 |
op_rights |
CC-BY |
op_rightsnorm |
CC-BY |
_version_ |
1766009310204133376 |