Englacial temperature time-series from the northern sector of Larsen C Ice Shelf, Antarctica
GB/NERC/BAS/PDC/01063
Abstract:
The datasets are temperature time series from strings of thermistors, each located at a discrete depth within one of six boreholes drilled to a depth of ~100 m in the northern sector of Larsen C Ice Shelf, Antarctica. Supporting borehole information is presented by Ashmore and others (2017).
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. Associated (near-surface) borehole temperature records, OPTV logs and density records are also available, as are other MIDAS datasets.
Citation:
Hubbard, B., & Ashmore, D. (2018). Englacial temperature time-series 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/f8c4787b-fcdb-4514-8a03-76ed93f47de5
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License
| Access: | No restrictions apply. |
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| Use: | This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v.3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
Basic Information
| Creation Date: | 2018-02-02 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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Additional Information
| Reference: | Ashmore, David W., Bryn Hubbard, Adrian Luckman, Bernd Kulessa, Suzanne Bevan, Adam Booth, Peter Kuipers Munneke, Martin O'Leary, Heidi Sevestre, and Paul R. Holland. 2017. 'Ice and firn heterogeneity within Larsen C Ice Shelf from borehole optical televiewing', Journal of Geophysical Research: Earth Surface, 122: 1139-53. Doyle, S. H., B. Hubbard, P. Christoffersen, T. J. Young, C. Hofstede, M. Bougamont, J. E. Box, and A. Hubbard. 2018. 'Physical conditions of fast glacier flow: 1. Measurements from boreholes drilled to the bed of Store Glacier, West Greenland', Journal of Geophysical Research: Earth Surface. DOI: 10.1002/2017JF004529 Hubbard, Bryn, Adrian Luckman, David W. Ashmore, Suzanne Bevan, Bernd Kulessa, Peter Kuipers Munneke, Morgane Philippe, Daniela Jansen, Adam Booth, Heidi Sevestre, Jean-Louis Tison, Martin O'Leary, and Ian Rutt. 2016. 'Massive subsurface ice formed by refreezing of ice-shelf melt ponds', Nature Communications, 7: 11897. |
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| Quality: | Detailed methodology, including accuracy estimation, is presented by Doyle and others (2018). The data has a resolution of ~0.05 °C. Each thermistor typically logged temperature every 30 minutes for the time periods evident from each data record. | |
| Lineage/Methodology: | The datasets are temperature time series recorded be several thermistors mounted on strings installed into six boreholes drilled to ~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). Boreholes were located 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 Cl_60; -66.886, -62.843; Nov 2014 CI_120; -67.000, -61.486; Nov 2015 WI_0; -67.444, -64.953; Dec 2015 WI_70; -67.500, -63.336; Dec 2015 |
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Extent
| Temporal Coverage: | |
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| Start Date | 2014-11-01 |
| End Date | 2015-12-31 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -67.5 |
| Northernmost | -66.403 |
| Longitude | |
| Westernmost | -64.953 |
| Easternmost | -61.486 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Larsen C Ice Shelf |
Instrumentation
| Data Collection: | Temperatures were acquired using Fenwal UNI-CURVE negative temperature coefficient thermistors controlled by Campbell Scientific CR1000 data loggers from the ice shelf surface. Details are provided by Doyle and others (2018). |
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Storage
| Data Storage: | The data are comma-separated ASCII files (*.csv format). Each file size is ~1 MB with 6 files in total. Each file holds the data for a single borehole with each column presenting a different thermistor (labelled by depth from surface in m) and each row the time at which the temperature was recorded. 'T_Panel' is the temperature within the datalogger enclosure mounted on a surface pole, and 'T_Coils' at CI-0 is that of a thermistor located within excess logging cable wrapped around the logger-mounting pole - an approximation for air temperature. Temperatures are in degrees Celsius, with a reading of -9999 indicating no data or erroneous data. |
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