BGS Hosted Metadata
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
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None
- Unique resource identifier
- https://doi.org/10.5285/c5fa84fb-f6e3-4780-8517-de0f78b62ea3
- Codespace
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doi
- Unique resource identifier
- GB/NERC/BAS/PDC/01062
- Codespace
- Unique resource identifier
- NE/L006707/1
- Codespace
-
award
- Unique resource identifier
- NE/L005409/1
- Codespace
-
award
- Other citation details
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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
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No credit.
- Status
- Completed
- Point of contact
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Organisation name Individual name Electronic mail address Role University of Liverpool
Hubbard, Bryn
Author University of Liverpool
Ashmore, David
Author NERC EDS UK Polar Data Centre Point of contact
- Maintenance and update frequency
- As needed
- Maintenance note
- Completed
- Theme
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Antarctica
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Ice boreholes
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Ice shelf density
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Larsen C Ice Shelf
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Optical televiewer
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- Place
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Laren C Ice Shelf Antarctica
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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
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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
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This data is governed by the NERC data policy and supplied under Open Government Licence v.3
- Use constraints
- Other restrictions
- Other constraints
-
No restrictions apply.
- Unique resource identifier
- url
- Codespace
-
url
- Association Type
- Cross reference
- Spatial representation type
- Text, table
- Language
- English
- Character set
- UTF8
- Topic category
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- Climatology, meteorology, atmosphere
- Environment
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- 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.
- Title
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European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
- Date (Publication)
- 2008-11-12
- Cited responsible party
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Organisation name Individual name Electronic mail address Role European Petroleum Survey Group
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 Distributor
- Units of distribution
-
bytes
- Transfer size
- 1
- OnLine resource
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Protocol Linkage Name WWW:LINK-1.0-http--link
https://ramadda.data.bas.ac.uk/repository/entry/show/?entryid=c5fa84fb-f6e3-4780-8517-de0f78b62ea3 Get Data
- Hierarchy level
- Dataset
- Statement
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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.
Metadata
- File identifier
- c5fa84fb-f6e3-4780-8517-de0f78b62ea3 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
-
dataset
- Date stamp
- 2018-02-02
- Metadata standard name
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ISO 19115 Geographic Information - Metadata
- Metadata standard version
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ISO 19115:2003(E)
- Metadata author
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Organisation name Individual name Electronic mail address Role NERC EDS UK Polar Data Centre Point of contact
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