Line-of-Sight Velocities of 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 line-of-sight velocities averaged over 3 h over an approximately 8 day period in November 2018. Tidal modulation of ice streams and their adjacent...
Main Authors: | , , , , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2021
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.935702 https://doi.org/10.1594/PANGAEA.935702 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.935702 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.935702 2024-09-15T17:44:16+00:00 Line-of-Sight Velocities of 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, 1.5 GBytes https://doi.pangaea.de/10.1594/PANGAEA.935702 https://doi.org/10.1594/PANGAEA.935702 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.935702 https://doi.org/10.1594/PANGAEA.935702 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Antarctica flowfields grounding zone dynamics Ice dynamics Priestley_Glacier Terrestrial Radar Interferometry dataset 2021 ftpangaea https://doi.org/10.1594/PANGAEA.935702 2024-07-24T02:31:34Z These data were aquired with a Terrestrial Radar Interferometer overlooking the grounding zone of Priestley Glacier, Antarctica. The time series contains line-of-sight velocities averaged over 3 h over 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 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 flowfields grounding zone dynamics Ice dynamics Priestley_Glacier Terrestrial Radar Interferometry |
spellingShingle |
Antarctica flowfields grounding zone dynamics Ice dynamics Priestley_Glacier Terrestrial Radar Interferometry Drews, Reinhard Wild, Christian T Marsh, Oliver Rack, Wolfgang Ehlers, Todd A Neckel, Niklas Helm, Veit Line-of-Sight Velocities of Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry |
topic_facet |
Antarctica flowfields grounding zone dynamics Ice dynamics Priestley_Glacier Terrestrial Radar Interferometry |
description |
These data were aquired with a Terrestrial Radar Interferometer overlooking the grounding zone of Priestley Glacier, Antarctica. The time series contains line-of-sight velocities averaged over 3 h over 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 |
Line-of-Sight Velocities of Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry |
title_short |
Line-of-Sight Velocities of Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry |
title_full |
Line-of-Sight Velocities of Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry |
title_fullStr |
Line-of-Sight Velocities of Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry |
title_full_unstemmed |
Line-of-Sight Velocities of Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry |
title_sort |
line-of-sight velocities of priestley glacier, antarctica, aquired with terrestrial radar interferometry |
publisher |
PANGAEA |
publishDate |
2021 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.935702 https://doi.org/10.1594/PANGAEA.935702 |
op_coverage |
LATITUDE: -74.400000 * LONGITUDE: 163.500000 * MINIMUM ELEVATION: 100.0 m * MAXIMUM ELEVATION: 100.0 m |
long_lat |
ENVELOPE(163.500000,163.500000,-74.400000,-74.400000) |
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.935702 https://doi.org/10.1594/PANGAEA.935702 |
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.935702 |
_version_ |
1810491690330357760 |