Ice thickness, surface-, and bed elevation of a pinning point in Roi Baudouin Ice Shelf, Dronning Maud Land Antarctica, supplement to: Berger, Sophie; Favier, Lionel; Drews, Reinhard; Derwael, Jean-Jacques; Pattyn, Frank (2016): The control of an uncharted pinning point on the flow of an Antarctic ice shelf. Journal of Glaciology, 62(231), 37-45
This dataset describes ice thickness, surface elevation and bed elevation of a small pinning point located at the ice-shelf front of the Roi Baudouin Ice Shelf, Dronning Maud Land, Antarctica. The scientific context is as follows: Antarctic ice shelves are buttressed by numerous pinning points attac...
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PANGAEA - Data Publisher for Earth & Environmental Science
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Online Access: | https://dx.doi.org/10.1594/pangaea.905997 https://doi.pangaea.de/10.1594/PANGAEA.905997 |
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ftdatacite:10.1594/pangaea.905997 2023-05-15T13:44:39+02:00 Ice thickness, surface-, and bed elevation of a pinning point in Roi Baudouin Ice Shelf, Dronning Maud Land Antarctica, supplement to: Berger, Sophie; Favier, Lionel; Drews, Reinhard; Derwael, Jean-Jacques; Pattyn, Frank (2016): The control of an uncharted pinning point on the flow of an Antarctic ice shelf. Journal of Glaciology, 62(231), 37-45 Drews, Reinhard 2019 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.905997 https://doi.pangaea.de/10.1594/PANGAEA.905997 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://store.pangaea.de/Publications/Drews_2019/RDrews_PinningPoint_QUICKSHOT.png https://dx.doi.org/10.1017/jog.2016.7 https://store.pangaea.de/Publications/Drews_2019/RDrews_PinningPoint_QUICKSHOT.png https://dx.doi.org/10.1002/2014jf003246 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Bed Elevation ice thickness Pinning Points Surface Elevation Polar stereographic projection, X Polar stereographic projection, Y Surface elevation Bed elevation Ice thickness Satellite remote sensing Differential, kinematic GPS with dual phase receivers Dataset dataset Supplementary Dataset 2019 ftdatacite https://doi.org/10.1594/pangaea.905997 https://doi.org/10.1017/jog.2016.7 https://doi.org/10.1002/2014jf003246 2022-02-09T13:33:23Z This dataset describes ice thickness, surface elevation and bed elevation of a small pinning point located at the ice-shelf front of the Roi Baudouin Ice Shelf, Dronning Maud Land, Antarctica. The scientific context is as follows: Antarctic ice shelves are buttressed by numerous pinning points attaching to the otherwise freely-floating ice from below. Some of these kilometric-scale grounded features are unresolved in Antarctic-wide datasets of ice thickness and bathymetry, hampering ice flow models to fully capture dynamics at the grounding line and upstream. We investigate the role of an 8.7 km2 pinning point at the front of the Roi Baudouin Ice Shelf, East Antarctica. Using ERS interferometry and ALOS-PALSAR speckle tracking, we derive, on a 125 m grid spacing, surface velocities deviating by −5.2 ± 4.5 m a−1 from 37 on-site global navigation satellite systems-derived velocities. We find no evidence for ice flow changes on decadal time scales and we show that ice on the pinning point virtually stagnates, deviating the ice stream and causing enhanced horizontal shearing upstream. Using the BISICLES ice-flow model, we invert for basal friction and ice rigidity with three input scenarios of ice velocity and geometry. We show that inversion results are the most sensitive to the presence/absence of the pinning point in the bathymetry; surface velocities at the pinning point are of secondary importance. Undersampling of pinning points results in erroneous ice-shelf properties in models initialised by control methods. This may impact prognostic modelling for ice-sheet evolution in the case of unpinning. : Radar thickness/bed measurements use wave speed of 1.68e8 m/s; Firn correction appliedData reference and details on processing in: Drews, 2015 (doi:10.5194/tc-9-1169-2015). Dataset Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf Ice Shelves DataCite Metadata Store (German National Library of Science and Technology) Antarctic East Antarctica Dronning Maud Land Roi Baudouin ENVELOPE(24.461,24.461,-70.438,-70.438) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Bed Elevation ice thickness Pinning Points Surface Elevation Polar stereographic projection, X Polar stereographic projection, Y Surface elevation Bed elevation Ice thickness Satellite remote sensing Differential, kinematic GPS with dual phase receivers |
spellingShingle |
Bed Elevation ice thickness Pinning Points Surface Elevation Polar stereographic projection, X Polar stereographic projection, Y Surface elevation Bed elevation Ice thickness Satellite remote sensing Differential, kinematic GPS with dual phase receivers Drews, Reinhard Ice thickness, surface-, and bed elevation of a pinning point in Roi Baudouin Ice Shelf, Dronning Maud Land Antarctica, supplement to: Berger, Sophie; Favier, Lionel; Drews, Reinhard; Derwael, Jean-Jacques; Pattyn, Frank (2016): The control of an uncharted pinning point on the flow of an Antarctic ice shelf. Journal of Glaciology, 62(231), 37-45 |
topic_facet |
Bed Elevation ice thickness Pinning Points Surface Elevation Polar stereographic projection, X Polar stereographic projection, Y Surface elevation Bed elevation Ice thickness Satellite remote sensing Differential, kinematic GPS with dual phase receivers |
description |
This dataset describes ice thickness, surface elevation and bed elevation of a small pinning point located at the ice-shelf front of the Roi Baudouin Ice Shelf, Dronning Maud Land, Antarctica. The scientific context is as follows: Antarctic ice shelves are buttressed by numerous pinning points attaching to the otherwise freely-floating ice from below. Some of these kilometric-scale grounded features are unresolved in Antarctic-wide datasets of ice thickness and bathymetry, hampering ice flow models to fully capture dynamics at the grounding line and upstream. We investigate the role of an 8.7 km2 pinning point at the front of the Roi Baudouin Ice Shelf, East Antarctica. Using ERS interferometry and ALOS-PALSAR speckle tracking, we derive, on a 125 m grid spacing, surface velocities deviating by −5.2 ± 4.5 m a−1 from 37 on-site global navigation satellite systems-derived velocities. We find no evidence for ice flow changes on decadal time scales and we show that ice on the pinning point virtually stagnates, deviating the ice stream and causing enhanced horizontal shearing upstream. Using the BISICLES ice-flow model, we invert for basal friction and ice rigidity with three input scenarios of ice velocity and geometry. We show that inversion results are the most sensitive to the presence/absence of the pinning point in the bathymetry; surface velocities at the pinning point are of secondary importance. Undersampling of pinning points results in erroneous ice-shelf properties in models initialised by control methods. This may impact prognostic modelling for ice-sheet evolution in the case of unpinning. : Radar thickness/bed measurements use wave speed of 1.68e8 m/s; Firn correction appliedData reference and details on processing in: Drews, 2015 (doi:10.5194/tc-9-1169-2015). |
format |
Dataset |
author |
Drews, Reinhard |
author_facet |
Drews, Reinhard |
author_sort |
Drews, Reinhard |
title |
Ice thickness, surface-, and bed elevation of a pinning point in Roi Baudouin Ice Shelf, Dronning Maud Land Antarctica, supplement to: Berger, Sophie; Favier, Lionel; Drews, Reinhard; Derwael, Jean-Jacques; Pattyn, Frank (2016): The control of an uncharted pinning point on the flow of an Antarctic ice shelf. Journal of Glaciology, 62(231), 37-45 |
title_short |
Ice thickness, surface-, and bed elevation of a pinning point in Roi Baudouin Ice Shelf, Dronning Maud Land Antarctica, supplement to: Berger, Sophie; Favier, Lionel; Drews, Reinhard; Derwael, Jean-Jacques; Pattyn, Frank (2016): The control of an uncharted pinning point on the flow of an Antarctic ice shelf. Journal of Glaciology, 62(231), 37-45 |
title_full |
Ice thickness, surface-, and bed elevation of a pinning point in Roi Baudouin Ice Shelf, Dronning Maud Land Antarctica, supplement to: Berger, Sophie; Favier, Lionel; Drews, Reinhard; Derwael, Jean-Jacques; Pattyn, Frank (2016): The control of an uncharted pinning point on the flow of an Antarctic ice shelf. Journal of Glaciology, 62(231), 37-45 |
title_fullStr |
Ice thickness, surface-, and bed elevation of a pinning point in Roi Baudouin Ice Shelf, Dronning Maud Land Antarctica, supplement to: Berger, Sophie; Favier, Lionel; Drews, Reinhard; Derwael, Jean-Jacques; Pattyn, Frank (2016): The control of an uncharted pinning point on the flow of an Antarctic ice shelf. Journal of Glaciology, 62(231), 37-45 |
title_full_unstemmed |
Ice thickness, surface-, and bed elevation of a pinning point in Roi Baudouin Ice Shelf, Dronning Maud Land Antarctica, supplement to: Berger, Sophie; Favier, Lionel; Drews, Reinhard; Derwael, Jean-Jacques; Pattyn, Frank (2016): The control of an uncharted pinning point on the flow of an Antarctic ice shelf. Journal of Glaciology, 62(231), 37-45 |
title_sort |
ice thickness, surface-, and bed elevation of a pinning point in roi baudouin ice shelf, dronning maud land antarctica, supplement to: berger, sophie; favier, lionel; drews, reinhard; derwael, jean-jacques; pattyn, frank (2016): the control of an uncharted pinning point on the flow of an antarctic ice shelf. journal of glaciology, 62(231), 37-45 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2019 |
url |
https://dx.doi.org/10.1594/pangaea.905997 https://doi.pangaea.de/10.1594/PANGAEA.905997 |
long_lat |
ENVELOPE(24.461,24.461,-70.438,-70.438) |
geographic |
Antarctic East Antarctica Dronning Maud Land Roi Baudouin |
geographic_facet |
Antarctic East Antarctica Dronning Maud Land Roi Baudouin |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf Ice Shelves |
op_relation |
https://store.pangaea.de/Publications/Drews_2019/RDrews_PinningPoint_QUICKSHOT.png https://dx.doi.org/10.1017/jog.2016.7 https://store.pangaea.de/Publications/Drews_2019/RDrews_PinningPoint_QUICKSHOT.png https://dx.doi.org/10.1002/2014jf003246 |
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.905997 https://doi.org/10.1017/jog.2016.7 https://doi.org/10.1002/2014jf003246 |
_version_ |
1766204475285962752 |