Thwaites Glacier ice surface speed change from January 2012 to January 2021

A map of changes in ice surface speed in metres/year for Thwaites Glacier, West Antarctica, between January 2012 and January 2021. Speeds based on feature tracking of satellite synthetic aperture radar data.





The work was funded by NERC projects NE/P011365/1 and NE/S006605/1.

Simple

Date (Creation)
2021-05-25
Date (Revision)
2021-05-25
Date (Publication)
2021-05-25
Date (released)
2021-05-25
Edition

1.0
Unique resource identifier
https://doi.org/10.5285/668bf042-d0de-4741-a62e-2ae93b6f7106
Codespace

doi
Unique resource identifier
GB/NERC/BAS/PDC/01506
Codespace

https://data.bas.ac.uk/

Unique resource identifier
NE/P011365/1
Codespace

award
Unique resource identifier
NE/S006605/1
Codespace

award
Other citation details

Please cite this item as: Bevan, S., Luckman, A., & Benn, D. (2021). Thwaites Glacier ice surface speed change from January 2012 to January 2021 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/668bf042-d0de-4741-a62e-2ae93b6f7106

Credit

No credit.
Status
Completed
Point of contact
Organisation name Individual name Electronic mail address Role

Swansea University

 		Bevan, Suzanne Author

Swansea University

 		Luckman, Adrian Author

University of St Andrews

 		Benn, Douglas Author
NERC EDS UK Polar Data Centre

PDCServiceDesk@bas.ac.uk

Point of contact
Maintenance and update frequency
As needed
Maintenance note
Completed
Global Change Master Directory (GCMD) Science Keywords
Theme

  • ITGC

  • Thwaites Glacier

  • acceleration

  • ice surface speed
Place

  • Thwaites Glacier Antarctica

GEMET - INSPIRE themes, version 1.0
Access constraints
Other restrictions
Other constraints
no limitations to public access
Access constraints
Other restrictions
Other constraints
no limitations
Use constraints
License
Other constraints
Open Government Licence v3.0
Use constraints
Other restrictions
Other constraints

Data supplied under Open Government Licence v3.0
Use constraints
Other restrictions
Other constraints

No restrictions apply.
Unique resource identifier
url
Codespace

url
Association Type
Cross reference
Unique resource identifier
doi
Codespace

doi
Association Type
Cross reference
Unique resource identifier
doi
Codespace

doi
Association Type
Cross reference
Spatial representation type
Text, table
Language
English
Character set
UTF8
Topic category
  • Geoscientific information
  • Imagery base maps earth cover
N
S
E
W
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Begin date
2012-01-01
End date
2021-01-31
Supplemental Information

It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title

European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
Date (Publication)
2008-11-12
Cited responsible party
Organisation name Individual name Electronic mail address Role

European Petroleum Survey Group

EPSGadministrator@iogp.org

Publisher
Unique resource identifier
urn:ogc:def:crs:EPSG::3031
Version

6.18.3

Distributor

Distributor contact
Organisation name Individual name Electronic mail address Role
NERC EDS UK Polar Data Centre

PDCServiceDesk@bas.ac.uk

Distributor
Distributor format
Name Version
image/tiff
Units of distribution

bytes
Transfer size
9122611
OnLine resource
Protocol Linkage Name

WWW:LINK-1.0-http--link

 		https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=668bf042-d0de-4741-a62e-2ae93b6f7106

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Hierarchy level
Dataset
Statement

Methodology:

January 2012 speeds were measures using feature-tracking of TerraSAR-X data between a pair of images acquired on 17/01/2012 and 28/01/2012. Speeds were measured at a horizontal resolution of 40 m. Image data were supplied by DLR.



The 2021 speeds were measured using feature-tracking Sentinel-1A and Sentinel-1B images and are a mean of all ten 6- or 12-day pairs acquired in January 2021. Speeds were measured at a horizontal resolution of 100 m and oversampled to 40 m before differencing (2021-2012) with the 2012 speeds. Image data were supplied by ESA.

Data collection:

Feature-tracking was carried out using Gamma Remote Sensing software 20190603.

Data quality:

All feature-tracked displacements were filtered twice: first by a signal to noise ratio based on the cross-correlation of image patches, and then according to deviation from the mean displacement within a neighbourhood. The displacements were converted from the SAR image geometry to ground range geometry, and the results geocoded using the RAMP DEM (Liu et al., 2015). N/A values in the difference geotiff are where either the 2012 or 2021 data are missing.

Metadata

File identifier
668bf042-d0de-4741-a62e-2ae93b6f7106 XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Hierarchy level name

dataset
Date stamp
2021-05-25
Metadata standard name

ISO 19115 Geographic Information - Metadata
Metadata standard version

ISO 19115:2003(E)
Metadata author
Organisation name Individual name Electronic mail address Role
NERC EDS UK Polar Data Centre

polardatacentre@bas.ac.uk

Point of contact
 
 

Overviews

Spatial extent

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Keywords

ITGC Thwaites Glacier acceleration ice surface speed
GEMET - INSPIRE themes, version 1.0

Elevation Hydrography
Global Change Master Directory (GCMD) Science Keywords

EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glaciers EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glaciers


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