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Fields and parameters related to the flow of ice in the Antarctic Ice Sheet recovered using inverse methods and satellite data

We can learn about the flow of ice in Antarctica by evaluating the key parameters that control the flow speed. These parameters include the basal drag coefficient and the ice viscosity. They can be estimated by adjusting their values so that model velocities at the upper surface agree with satellite observations. This dataset was produced using inverse methods to obtain the parameter values. In this approach a cost function that describes the mismatch between model and satellite data is minimised iteratively by making small adjustments to the parameters at each iteration to improve the fit. The result is better information about the flow field in the Antarctic ice sheet. Once the flow field is available it can be used as an initial state from which begin temporally evolving simulations using the model. A number of different examples are included to show how varying different parameters alters the temporally evolving simulations.





The contributing datasets used to constrain the model are listed by Arthern et al (2015) and Arthern and Williams (2017). Multidecadal model simulations span up to 100 years of simulation time.





This work was funded by NERC standard grant NE/L005212/1.

Simple

Date (Creation)
2022-04-08
Date (Revision)
2022-04-08
Date (Publication)
2022-04-08
Date (released)
2022-04-08
Edition

1.0

Unique resource identifier
https://doi.org/10.5285/5f0ac285-cca3-4a0e-bcbc-d921734395ab
Codespace

doi

Unique resource identifier
GB/NERC/BAS/PDC/01632
Codespace

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

Unique resource identifier
NE/L005212/1
Codespace

award

Other citation details

Please cite this item as: Arthern, R., Williams, R., Hindmarsh, R., & Pritchard, H. (2022). Fields and parameters related to the flow of ice in the Antarctic Ice Sheet recovered using inverse methods and satellite data (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/5f0ac285-cca3-4a0e-bcbc-d921734395ab

Credit

No credit.

Status
Completed
Point of contact
Organisation name Individual name Electronic mail address Role
British Antarctic Survey Arthern, Robert Author
British Antarctic Survey Williams, Rosie Author
British Antarctic Survey Hindmarsh, Richard Author
British Antarctic Survey Pritchard, Hamish 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
  • EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation
  • EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion
  • EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Thickness/Ice Sheet Thickness
  • EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Topography/Ice Sheet Topography
  • EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Ice Sheets
  • EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation
  • EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion
  • EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Thickness/Ice Sheet Thickness
  • EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Topography/Ice Sheet Topography
  • EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Ice Sheets
Theme
  • Antarctica

  • basal drag

  • ice flow

  • ice viscosity

Place
  • Amundsen Sea sector of West Antarctica Antarctica

GEMET - INSPIRE themes, version 1.0

  • Elevation
  • Hydrography
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
Larger work citation
Unique resource identifier
url
Codespace

url

Association Type
Larger work citation
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
Unique resource identifier
doi
Codespace

doi

Association Type
Cross reference
Spatial representation type
Text, table
Language
English
Character set
UTF8
Topic category
  • Elevation
  • Environment
  • Geoscientific information
  • Oceans
N
S
E
W
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Vertical extent

Minimum value
0.0
Maximum value
5.0

Vertical CS

No information provided.

Vertical datum

No information provided.
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
application/octet-stream
application/netcdf
text/plain
text/csv
Units of distribution

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Transfer size
14817637171
OnLine resource
Protocol Linkage Name

WWW:LINK-1.0-http--link

https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=5f0ac285-cca3-4a0e-bcbc-d921734395ab

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Transfer size
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Dataset
Statement

Methodology:

The processing of the data is described by Arthern et al. (2015) and Arthern and Williams (2017) (see references section). Inverse methods were used to find the basal drag and ice viscosity parameters that allow the model to agree best with satellite observations. Once the ice flow parameters have been obtained, the modelled ice flow within the ice sheet can be evaluated and used to start temporally evolving simulations for a variety of different parameter choices, as described by Arthern and Williams (2017).

Data collection:

Data processing and modelling was done using MATLAB (Version 8).





The contributing datasets used to constrain the model are listed by Arthern et al (2015) and Arthern and Williams (2017). Multidecadal model simulations span up to 100 years of simulation time.

Data quality:

The algorithm used was evaluated on idealised test cases as described by Arthern and Gudmundsson (2010). Arthern et al (2015) shows maps of discrepancy between model velocity and satellite derived velocity, and histograms of the differences between model elevation changes and elevation changes derived using satellite altimetry. For the temporally evolving simulations two datasets are included; one as originally computed and one with accumulation rates corrected for a processing error.

Metadata

File identifier
5f0ac285-cca3-4a0e-bcbc-d921734395ab XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Hierarchy level name

dataset

Date stamp
2022-04-08
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

thumbnail

Keywords

Antarctica basal drag ice flow ice viscosity
GEMET - INSPIRE themes, version 1.0

Elevation Hydrography
Global Change Master Directory (GCMD) Science Keywords

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


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