Date (Creation)

2020-05-11

Date (Revision)

2020-05-11

Date (Publication)

2020-05-11

Date (released)

2020-05-11

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/01f26c07-ea6c-4d89-893e-d86247874e78

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/01330

Codespace

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

Unique resource identifier

NE/D009200/1

Codespace

award

Unique resource identifier

NE/D008638/1

Codespace

award

Unique resource identifier

NE/D008751/1

Codespace

award

Other citation details

Please cite this item as: Smith, A., Woodward, J., & Ross, N. (2020). Ice surface, ice base and lake bed elevation data from seismic data acquired over Subglacial Lake Ellsworth 2007-08 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/01f26c07-ea6c-4d89-893e-d86247874e78

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey	Smith, Andrew		Author
University of Northumbria	Woodward, John		Author
Newcastle University	Ross, Neil		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 > Land Surface > Topography > Terrain Elevation
• EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets

Theme

• Subglacial Lake Ellsworth

• West Antarctica

• lake-bed elevation

• seismic

Place

• Ellsworth Subglacial Lake (better known as Subglacial Lake Ellsworth) Antarctica

GEMET - INSPIRE themes, version 1.0

• Elevation
• Land cover

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

This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/

Use constraints

Other restrictions

Other constraints

These data are governed by the NERC data policy and supplied under Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

No restrictions apply.

Unique resource identifier

doi

Codespace

doi

Association Type

Cross reference

Unique resource identifier

doi

Codespace

doi

Association Type

Cross reference

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

• Elevation
• Environment
• Geoscientific information

Begin date

2007-11-01

End date

2008-02-29

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

Hierarchy level

Dataset

Statement

Methodology:

Five seismic reflection profiles were acquired. The seismic source was 450 g explosives at 30 m depth. Shot spacing was 240 m, number of channels was 48 and geophone spacing was 10 m, resulting in single-fold data. Data processing included normal moveout correction, and migration. Ice-water and water-bed interface reflections were picked from stacked seismic sections. Depth conversion used a travel-time correction for the upper snow and firn, and standard ice- and water-column velocities. Full details of data acquisition and processing are given in:

Woodward, J., A. M. Smith, N. Ross, M. Thoma, H. F. J. Corr, E. C. King, M. A. King, K. Grosfeld, M. Tranter, M. J. Siegert, 2010. Location for direct access to subglacial Lake Ellsworth: An assessment of geophysical data and modelling. Geophysical Research Letters, doi:10.1029/2010GL042884.

Smith, A.M., J. Woodward, N. Ross, M.J. Bentley, D.A. Hodgson, M.J. Siegert, E.C. King, 2018. Evidence for the long-term sedimentary environment in an Antarctic subglacial lake. Earth and Planetary Science Letters, doi:10.1016/j.epsl.2018.10.011.

Data collection:

Seismic data were acquired with Geometrics Geode seismographs; data processing and picking were done with Landmark ProMAX.

Data quality:

Data quality are good; the ice-water interface can be clearly picked on virtually all traces, the water-bed interface can be picked in most places, except close to the lake shoreline and at a few other locations on each line. Only the results from traces where both reflections can be picked are provided. Nominal point spacing is 5 m, with occasional gaps at the locations where both reflections could not be picked. Absolute errors in ice- and water-column thickness are 10 m and 1.5 m respectively, although relative thicknesses changes (trace-to-trace) are more precise. See publications for full details.

Metadata

File identifier

01f26c07-ea6c-4d89-893e-d86247874e78 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2020-05-11

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