Differential Interferograms of the grounding zone at Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry
These data were aquired with a Terrestrial Radar Interferometer overlooking the grounding zone of Priestley Glacier, Antarctica. The time series contains differential interferograms with a 12h temporal baseline covering an approximately 8 day period in November 2018. Tidal modulation of ice streams...
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2021
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.935707 2024-06-23T07:47:56+00:00 Differential Interferograms of the grounding zone at Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry Drews, Reinhard Wild, Christian T Marsh, Oliver Rack, Wolfgang Ehlers, Todd A Neckel, Niklas Helm, Veit LATITUDE: -74.400000 * LONGITUDE: 163.500000 * MINIMUM ELEVATION: 100.0 m * MAXIMUM ELEVATION: 100.0 m 2021 application/zip, 218 MBytes https://doi.pangaea.de/10.1594/PANGAEA.935707 https://doi.org/10.1594/PANGAEA.935707 en eng PANGAEA Drews, Reinhard; Wild, Christian T; Marsh, Oliver; Rack, Wolfgang; Ehlers, Todd A; Neckel, Niklas; Helm, Veit (accepted): Grounding-zone flow variability of Priestley Glacier, Antarctica, in a diurnal tidal regime. Geophysical Research Letters https://doi.pangaea.de/10.1594/PANGAEA.935707 https://doi.org/10.1594/PANGAEA.935707 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Antarctica Differential Interferometry ERA-PLANET flowfields grounding zone dynamics Ice dynamics Priestley_Glacier Terrestrial Radar Interferometry The European network for observing our changing planet Dataset 2021 ftpangaea https://doi.org/10.1594/PANGAEA.935707 2024-06-12T14:17:12Z These data were aquired with a Terrestrial Radar Interferometer overlooking the grounding zone of Priestley Glacier, Antarctica. The time series contains differential interferograms with a 12h temporal baseline covering an approximately 8 day period in November 2018. Tidal modulation of ice streams and their adjacent ice shelves is a real-world experiment to understand ice-dynamic processes. We observe the dynamics of Priestley Glacier, Antarctica, using Terrestrial Radar Interferometry (TRI) and GNSS. Ocean tides are predominantly diurnal but horizontal GNSS displacements oscillate also semi-diurnally. The oscillations are strongest in the ice shelf and tidal signatures decay near-linearly in the TRI data over >10 km upstream of the grounding line. Tidal flexing is observed >6 km upstream of the grounding line including cm-scale uplift. Tidal grounding line migration is small and <40 % of the ice thickness. The frequency doubling of horizontal displacements relative to the ocean tides is consistent with variable ice-shelf buttressing demonstrated with a visco-elastic Maxwell model. Taken together, this supports previously hypothesized flexural ice softening in the grounding-zone through tides and offers new observational constraints for the role of ice rheology in ice-shelf buttressing. Dataset Antarc* Antarctica Ice Shelf Ice Shelves Priestley Glacier PANGAEA - Data Publisher for Earth & Environmental Science Priestley ENVELOPE(161.883,161.883,-75.183,-75.183) Priestley Glacier ENVELOPE(163.367,163.367,-74.333,-74.333) ENVELOPE(163.500000,163.500000,-74.400000,-74.400000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Antarctica Differential Interferometry ERA-PLANET flowfields grounding zone dynamics Ice dynamics Priestley_Glacier Terrestrial Radar Interferometry The European network for observing our changing planet |
spellingShingle |
Antarctica Differential Interferometry ERA-PLANET flowfields grounding zone dynamics Ice dynamics Priestley_Glacier Terrestrial Radar Interferometry The European network for observing our changing planet Drews, Reinhard Wild, Christian T Marsh, Oliver Rack, Wolfgang Ehlers, Todd A Neckel, Niklas Helm, Veit Differential Interferograms of the grounding zone at Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry |
topic_facet |
Antarctica Differential Interferometry ERA-PLANET flowfields grounding zone dynamics Ice dynamics Priestley_Glacier Terrestrial Radar Interferometry The European network for observing our changing planet |
description |
These data were aquired with a Terrestrial Radar Interferometer overlooking the grounding zone of Priestley Glacier, Antarctica. The time series contains differential interferograms with a 12h temporal baseline covering an approximately 8 day period in November 2018. Tidal modulation of ice streams and their adjacent ice shelves is a real-world experiment to understand ice-dynamic processes. We observe the dynamics of Priestley Glacier, Antarctica, using Terrestrial Radar Interferometry (TRI) and GNSS. Ocean tides are predominantly diurnal but horizontal GNSS displacements oscillate also semi-diurnally. The oscillations are strongest in the ice shelf and tidal signatures decay near-linearly in the TRI data over >10 km upstream of the grounding line. Tidal flexing is observed >6 km upstream of the grounding line including cm-scale uplift. Tidal grounding line migration is small and <40 % of the ice thickness. The frequency doubling of horizontal displacements relative to the ocean tides is consistent with variable ice-shelf buttressing demonstrated with a visco-elastic Maxwell model. Taken together, this supports previously hypothesized flexural ice softening in the grounding-zone through tides and offers new observational constraints for the role of ice rheology in ice-shelf buttressing. |
format |
Dataset |
author |
Drews, Reinhard Wild, Christian T Marsh, Oliver Rack, Wolfgang Ehlers, Todd A Neckel, Niklas Helm, Veit |
author_facet |
Drews, Reinhard Wild, Christian T Marsh, Oliver Rack, Wolfgang Ehlers, Todd A Neckel, Niklas Helm, Veit |
author_sort |
Drews, Reinhard |
title |
Differential Interferograms of the grounding zone at Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry |
title_short |
Differential Interferograms of the grounding zone at Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry |
title_full |
Differential Interferograms of the grounding zone at Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry |
title_fullStr |
Differential Interferograms of the grounding zone at Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry |
title_full_unstemmed |
Differential Interferograms of the grounding zone at Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry |
title_sort |
differential interferograms of the grounding zone at priestley glacier, antarctica, aquired with terrestrial radar interferometry |
publisher |
PANGAEA |
publishDate |
2021 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.935707 https://doi.org/10.1594/PANGAEA.935707 |
op_coverage |
LATITUDE: -74.400000 * LONGITUDE: 163.500000 * MINIMUM ELEVATION: 100.0 m * MAXIMUM ELEVATION: 100.0 m |
long_lat |
ENVELOPE(161.883,161.883,-75.183,-75.183) ENVELOPE(163.367,163.367,-74.333,-74.333) ENVELOPE(163.500000,163.500000,-74.400000,-74.400000) |
geographic |
Priestley Priestley Glacier |
geographic_facet |
Priestley Priestley Glacier |
genre |
Antarc* Antarctica Ice Shelf Ice Shelves Priestley Glacier |
genre_facet |
Antarc* Antarctica Ice Shelf Ice Shelves Priestley Glacier |
op_relation |
Drews, Reinhard; Wild, Christian T; Marsh, Oliver; Rack, Wolfgang; Ehlers, Todd A; Neckel, Niklas; Helm, Veit (accepted): Grounding-zone flow variability of Priestley Glacier, Antarctica, in a diurnal tidal regime. Geophysical Research Letters https://doi.pangaea.de/10.1594/PANGAEA.935707 https://doi.org/10.1594/PANGAEA.935707 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.935707 |
_version_ |
1802638203092467712 |