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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ftdatacite:10.1594/pangaea.935707 2023-05-15T13:44:13+02:00 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 2021 application/zip https://dx.doi.org/10.1594/pangaea.935707 https://doi.pangaea.de/10.1594/PANGAEA.935707 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 Differential Interferometry flowfields grounding zone dynamics Ice dynamics Terrestrial Radar Interferometry The European network for observing our changing planet ERA-PLANET dataset Dataset 2021 ftdatacite https://doi.org/10.1594/pangaea.935707 2022-02-08T16:39:48Z 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. : Time series of unwrapped interferograms with a 12h temporal baseline taken with a Terrestrial Radar Interferometer in November 2018 near the grounding zone of Priestley Glacier, Antarctica- The Zip Archive contains 252 Geotiff raster files in geographic project (EPSG 4326)- Each raster has 8793 x 2593 entries- All digits preceding the *_12.0h.diff.geo.tif file ending relate to time of the acquisition in terms of the decimal day of year 2018- The differential interferograms were unwrapped and converted into line-of-sight displacement in meters 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 Differential Interferometry flowfields grounding zone dynamics Ice dynamics Terrestrial Radar Interferometry The European network for observing our changing planet ERA-PLANET |
spellingShingle |
Antarctica Differential Interferometry flowfields grounding zone dynamics Ice dynamics Terrestrial Radar Interferometry The European network for observing our changing planet ERA-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 flowfields grounding zone dynamics Ice dynamics Terrestrial Radar Interferometry The European network for observing our changing planet ERA-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. : Time series of unwrapped interferograms with a 12h temporal baseline taken with a Terrestrial Radar Interferometer in November 2018 near the grounding zone of Priestley Glacier, Antarctica- The Zip Archive contains 252 Geotiff raster files in geographic project (EPSG 4326)- Each raster has 8793 x 2593 entries- All digits preceding the *_12.0h.diff.geo.tif file ending relate to time of the acquisition in terms of the decimal day of year 2018- The differential interferograms were unwrapped and converted into line-of-sight displacement in meters |
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 - Data Publisher for Earth & Environmental Science |
publishDate |
2021 |
url |
https://dx.doi.org/10.1594/pangaea.935707 https://doi.pangaea.de/10.1594/PANGAEA.935707 |
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.935707 |
_version_ |
1766198929611816960 |