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...
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ftdatacite:10.1594/pangaea.935702 2023-05-15T13:52:56+02:00 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 2021 application/zip https://dx.doi.org/10.1594/pangaea.935702 https://doi.pangaea.de/10.1594/PANGAEA.935702 en eng PANGAEA - Data Publisher for Earth & Environmental Science Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Antarctica flowfields grounding zone dynamics Ice dynamics Terrestrial Radar Interferometry dataset Dataset 2021 ftdatacite https://doi.org/10.1594/pangaea.935702 2021-11-05T12:55:41Z 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. : Time series of line-of-sight flowfields averaged over approximately three hours.Data were taken with a Terrestrial Radar Interferometer in November 2018 at the grounding zone of Priestley Glacier, Antarctica– The Zip Archive contains 288 Geotiff in South polar stereographic projection– Each raster has 4027 x 4746 entries– The file name details the approximately 3h time inverval of aquisition with Stack_YYYYMMDD_HHMMSS_YYYYMMDD_HHMMSS marking the beginning and end of the time interval, respectively.- The line of sight velocities are given in meters per year Dataset Antarc* Antarctica Ice Shelf Ice Shelves Priestley Glacier DataCite Metadata Store (German National Library of Science and Technology) Priestley ENVELOPE(161.883,161.883,-75.183,-75.183) Priestley Glacier ENVELOPE(163.367,163.367,-74.333,-74.333) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Antarctica flowfields grounding zone dynamics Ice dynamics Terrestrial Radar Interferometry |
spellingShingle |
Antarctica flowfields grounding zone dynamics Ice dynamics 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 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. : Time series of line-of-sight flowfields averaged over approximately three hours.Data were taken with a Terrestrial Radar Interferometer in November 2018 at the grounding zone of Priestley Glacier, Antarctica– The Zip Archive contains 288 Geotiff in South polar stereographic projection– Each raster has 4027 x 4746 entries– The file name details the approximately 3h time inverval of aquisition with Stack_YYYYMMDD_HHMMSS_YYYYMMDD_HHMMSS marking the beginning and end of the time interval, respectively.- The line of sight velocities are given in meters per year |
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 - Data Publisher for Earth & Environmental Science |
publishDate |
2021 |
url |
https://dx.doi.org/10.1594/pangaea.935702 https://doi.pangaea.de/10.1594/PANGAEA.935702 |
long_lat |
ENVELOPE(161.883,161.883,-75.183,-75.183) ENVELOPE(163.367,163.367,-74.333,-74.333) |
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_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.935702 |
_version_ |
1766257814995468288 |