GNSS Data collected at Priestley Glacier November 2018
This is GNSS data of four stations covering the grounding zone of Priestley Glacier Antarctica.
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.
Related Publication:
Drews, R., Wild, C. T., Marsh, O. J., Rack, W., Ehlers, T. A., Neckel, N., & Helm, V. (2021). Grounding-zone flow variability of Priestley Glacier, Antarctica, in a diurnal tidal regime. Geophysical Research Letters, 48, e2021GL093853. https://doi.org/10.1029/2021GL093853
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Identification info
- Date (Creation)
- 2021-09-22T00:00:00
- Date (Publication)
- 2021-09-22T00:00:00
- Citation identifier
- https://doi.org/10.1594/PANGAEA.936090
- Presentation form
- Status
- Completed
- Point of contact - Custodian, Owner, etc
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Role Organisation Individual Electronic mail address Author Drews, Reinhard. reinhard.drews@uni-tuebingen.de Co-author Wild, Christian T. wildch@oregonstate.edu Co-author Marsh, Oliver. olrs@bas.ac.uk Co-author Rack, Wolfgang. wolfgang.rack@canterbury.ac.nz Co-author Ehlers, Todd A. Co-author Neckel, Niklas. Co-author Helm, Veit. Publisher PANGAEA info@pangaea.de
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
))
Temporal extent
- Time period
- 2018-11-01T00:00:00 2018-12-29T12:00:00
- Maintenance and update frequency
- Not planned
- Keywords
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- PRIESTLEY GLACIER
- INSTALLATION
- K050A
- GCMD Earth Science and Earth Science Services Keywords
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- GLACIERS
- TIDES
- OCEANS
- GLACIER MOTION/ICE SHEET MOTION
- GCMD Platform/Sources Keywords
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- Global Positioning System (GPS)
- GCMD Instrument/Sensors Keywords
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- GPS
- GNSS
- GCMD Locations Keywords
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- ANTARCTICA
- Resource constraints
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Legal constraints Access constraints Use constraints Constraint application scope This data set conforms to the CC BY Attribution License (https://creativecommons.org/licenses/by/4.0/) License License Dataset
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distribution format
-
- Metadata constraints
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Legal constraints Access constraints Use constraints Constraint application scope This data set conforms to the CC BY Attribution License (https://creativecommons.org/licenses/by/4.0/) License License Metadata
Metadata
- Metadata identifier
- urn:uuid/d5409f49-303f-4b69-b679-9455f3ed07a9
- Language
- English
- Character encoding
- anyValidURI
- Metadata Contact
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Role Organisation Individual Electronic mail address Point of contact PANGAEA info@pangaea.de
Type of resource
- Resource scope
- Dataset
- Metadata linkage
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Name Linkage (URL) Protocol Function Description https://doi.org/10.1594/PANGAEA.936090 Complete Metadata
- Date info (Revision)
- 2024-10-07T22:25:27.393Z
- Date info (Creation)
- 2024-04-19T03:35:36
Metadata standard
- Format name
- ISO 19115-1
- Edition
- 2018
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