Double-difference TerraSAR-X interferograms and derived grounding lines at the grounding line of the Kamb and Whillans Ice Streams, West Antarctica, 2012-2023

This dataset includes double-difference interferograms derived from TerraSAR-X synthetic aperture radar data acquired at the grounding line downstream of Engelhardt Subglacial Lake on the Gould Coast, Antarctica, in September 2012, April 2016, July 2023 and October 2023. The September 2012, July 2023 and October 2023 interferograms were generated by Oliver J. Marsh (British Antarctic Survey) using the Gamma Remote Sensing software and geocoded with the Bedmap2 DEM. The April 2016 interferogram was generated by Dana Floricioiu (DLR, German Aerospace Center) using DLR''s Integrated Wide Area Processor (IWAP; Rodriguez et al, 2013). The image processing information, acquisition time and coincident modelled tide heights for all data used to derive the TerraSAR-X interferograms are provided in the lineage section.

For each interferogram (September 2012, April 2016, July 2023 and October 2023) we provide a shapefile of the derived grounding line, which was manually traced along the landward boundary of the dense fringe belt associated with the vertical tidal motion of the ice (Point F).

This dataset was produced as part of the study: Freer et al. (2024) Synchronous lake drainage and grounding line retreat at Engelhardt Subglacial Lake, West Antarctica. Journal of Geophysical Research: Earth Surface.

Funding:

Bryony I. D. Freer (project lead) was supported by Natural Environment Research Council (NERC) Satellite Data in Environmental Science (SENSE) Centre for Doctoral Training (grant no. NE/T00939X/1). Dana Floricioiu (dataset creator) was supported by DLR''s Polar Monitor II and Antarctic Ice Sheet CCI projects (ESA/Contract No. 4000126813/18/I-NB). Images were acquired under DLR TerraSAR-X science data proposal HYD3673 (PI Dana Floricioiu).

Alternate title: Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01862

Date (Publication): 2024-07-09

Citation identifier: http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01862

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey		pdc@bas.ac.uk	Custodian
NERC EDS UK Polar Data Centre	Marsh, O., Floricioiu, D., & Freer, B.	pdc@bas.ac.uk	Originator

Maintenance and update frequency: Unknown

Keywords

NDGO0001

NERC OAI Harvesting

NERC_DDC

GCMD Parameter Valids

EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets
EARTH SCIENCE > Cryosphere > Snow/Ice
EARTH SCIENCE > Spectral/Engineering > Radar

BAS Free-text keywords

SAR interferogram
Siple Coast
TerraSAR-X
grounding line
satellite

Use limitation: Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

Access constraints: Other restrictions

Other constraints: Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

Language: English

Topic category

Geoscientific information

Begin date: 2023-10-03

End date: 2023-10-25

Reference system identifier: OGP / urn:ogc:def:crs:EPSG::4326

Distribution format

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
Polar Data Centre - British Antarctic Survey		pdc@bas.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
http	http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=e1d182b1-6aa6-434e-9390-f7956227cb82	GET DATA

Hierarchy level: Dataset

Domain consistency

Measure identification: INSPIRE / Conformity_001

Conformance result

Title: INSPIRE Data Specification on unknown theme Guidelines

Date

Explanation: See the referenced specification

Pass: No

Statement: Resolution of the dataset:

** September 2012:

- Pixel resolution [m]: 20

- Spatial resolution (range) [m]: 2.5

- Spatial resolution (azimuth) [m]: 3.3

** April 2016:

- Pixel resolution [m]: 4.72

- Spatial resolution (range) [m]: 2.5

- Spatial resolution (azimuth) [m]: 3.3

** July 2023:

- Pixel resolution [m]: 8

- Spatial resolution (range) [m]: 2.5

- Spatial resolution (azimuth) [m]: 3.3

** October 2023:

- Pixel resolution [m]: 8

- Spatial resolution (range) [m]: 2.5

- Spatial resolution (azimuth) [m]: 3.3

Please note that the 2012 and 2016 interferograms were processed in a slightly different way to the July/Oct 2023 interferograms which is why the colour ramps appear slightly differently but this does not affect the data.