NERC Data Catalogue Service
Borehole density profiles reconstructed from calibrated optical televiewer (OPTV) logs from the northern sector of Larsen C Ice Shelf, Antarctica
These are vertical density profiles of snow, firn and ice reconstructed from the vertical luminosity trace of digital optical televiewer (OPTV) logs of five boreholes drilled by hot water to ~100 m depth in Larsen C Ice Shelf, Antarctica. Boreholes were drilled in austral summers of 2014 and 2015 in order to investigate the internal properties of the ice shelf, and specifically the influence of surface melting and melt pond formation on those properties.
These data are part of the NERC-funded MIDAS ('Impact of surface melt and ponding on ice shelf dynamics and stability') research project, with grant references NE/L006707/1 and NE/L005409/1. The associated borehole OPTV logs and temperature profiles are also available, as are other MIDAS datasets.
Simple
- Date (Creation)
- 2018-02-02
- Date (Revision)
- 2018-02-02
- Date (Publication)
- 2018-02-02
- Date (released)
- 2018-02-02
- Edition
- None
- Unique resource identifier
- https://doi.org/10.5285/c5fa84fb-f6e3-4780-8517-de0f78b62ea3
- Codespace
- doi
- Unique resource identifier
- GB/NERC/BAS/PDC/01062
- Codespace
- https://data.bas.ac.uk/
- Unique resource identifier
- NE/L006707/1
- Codespace
- award
- Unique resource identifier
- NE/L005409/1
- Codespace
- award
- Other citation details
- Please cite this item as: Hubbard, B., & Ashmore, D. (2018). Borehole density profiles reconstructed from calibrated optical televiewer (OPTV) logs from the northern sector of Larsen C Ice Shelf, Antarctica (Version None) [Data set]. Polar Data Centre, Natural Environment Research Council, UK. https://doi.org/10.5285/c5fa84fb-f6e3-4780-8517-de0f78b62ea3
- Credit
- No credit.
- Status
- completed Completed
https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/
- Maintenance and update frequency
- asNeeded As needed
- Maintenance note
- completed Completed
- Theme
-
- Antarctica
- Ice boreholes
- Ice shelf density
- Larsen C Ice Shelf
- Optical televiewer
- Place
-
- Laren C Ice Shelf Antarctica
- GEMET - INSPIRE themes, version 1.0
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- no limitations to public access
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- no limitations
- Use constraints
- license License
- Other constraints
- Open Government Licence v3.0
- Use constraints
- otherRestrictions 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
- otherRestrictions Other restrictions
- Other constraints
- This data is governed by the NERC data policy and supplied under Open Government Licence v.3
- Use constraints
- otherRestrictions Other restrictions
- Other constraints
- No restrictions apply.
- Unique resource identifier
- url
- Codespace
- url
- Association Type
- crossReference Cross reference
- Spatial representation type
- textTable Text, table
- Metadata language
- engEnglish
- Character set
- utf8 UTF8
- Topic category
-
- Climatology, meteorology, atmosphere
- Environment
))
- Begin date
- 2014-11-01
- End date
- 2015-12-31
- 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.
Distributor
https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/
- Units of distribution
- bytes
- Transfer size
- 1
- OnLine resource
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- Hierarchy level
- dataset Dataset
- Statement
-
Methodology:
The datasets are density profiles calculated from optical televiewer logs from five boreholes drilled to approaching 100 m depth along flow-lines extending from Cabinet Inlet and Whirlwind Inlet on Larsen C Ice Shelf, Antarctica, in austral summers of 2014 and 2015. These data are presented in whole or in part in Hubbard and others (2016) and Ashmore and others (2017). The OPTV luminosity - density calibration is presented in Hubbard (2013).
Density profiles, and parent OPTV logs, and were located (at the time of logging) as follows:
Borehole; Lat., Lon. (decimal degrees); Coordinate date
CI_0; -66.403, -63.376; Nov 2014
CI_22; -66.588, -63.212; Nov 2015
CI_120; -67.000, -61.486; Nov 2015
WI_0; -67.444, -64.953; Dec 2015
WI_70; -67.500, -63.336; Dec 2015
Data collection:
Logs were acquired using Robertson Geologging OPTV probe, mini winch and Micrologger II. Luminosity traces were extracted using BIFAT (Malone et al. 2013) software.
Data quality:
Density traces are provided at the same resolution, and subject to the same logging errors, as the field OPTV logs. The OPTV technique is described by Hubbard and others (2008).
Most OPTV logs, and hence density profiles, are at a vertical resolution of 1 mm.
- File identifier
- c5fa84fb-f6e3-4780-8517-de0f78b62ea3 XML
- Metadata language
- engEnglish
- Character set
- utf8 UTF8
- Hierarchy level
- dataset Dataset
- Hierarchy level name
- dataset
- Date stamp
- 2018-02-02
- Metadata standard name
- ISO 19115 Geographic Information - Metadata
- Metadata standard version
- ISO 19115:2003(E)
https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/
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