Abstract:
The datasets are temperature time series from thermistor strings installed into two boreholes drilled to a depth of ~7 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 (longer) borehole temperature records, OPTV logs and density records are also available, as are other MIDAS datasets.
Keywords:
Antarctica, Ice boreholes, Ice shelf temperature, Larsen C Ice Shelf
Hubbard, B., & Ashmore, D. (2018). Near-surface temperature time-series from the northern sector of Larsen C Ice Shelf, Antarctica (Version 1.0) [Data set]. Polar Data Centre, Natural Environment Research Council, UK. https://doi.org/10.5285/a41d117a-0701-4b6f-9836-4c7763cc4851
| Use Constraints: | 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/. |
|---|
| Creation Date: | 2018-02-02 |
|---|---|
| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
|
| Parameters: |
|
| Personnel: | |
| Name | UK PDC |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Bryn Hubbard |
| Role(s) | Technical Contact, Investigator |
| Organisation | Aberystwyth University |
| Name | David Ashmore |
| Role(s) | Investigator |
| Organisation | University of Liverpool |
| Parent Dataset: | N/A |
| 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 |
|
|---|---|---|
| Quality: | Detailed methodology, including accuracy estimation, is presented by Doyle and others (2018). The data has a resolution of ~0.05 °C. Boreholes were drilled and thermistor strings installed and logged as follows: String HR1 (CI-0): every 30 minutes from 25.11.2014 to 06.10.2015 String HR2 (CI-120): every 30 minutes from 20.11.2015 to 06.02.2017 |
|
| Lineage: | The datasets are temperature time series recorded by several thermistors mounted on strings installed into two boreholes drilled to ~7 m depth along a flow-line extending from Cabinet Inlet on Larsen C Ice Shelf, Antarctica, in austral summers of 2014 and 2015. Boreholes were located as follows: Borehole; Lat., Lon. (decimal degrees); Coordinate date CI_0; -66.403, -63.376; Nov 2014 CI_120; -67.000, -61.486; Nov 2015 |
|
| Temporal Coverage: | |
|---|---|
| Start Date | 2014-11-25 |
| End Date | 2017-02-06 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -67 |
| Northernmost | -66.403 |
| Longitude | |
| Westernmost | -63.376 |
| 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 |
| 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). |
|---|
| Data Storage: | The data are comma-separated ASCII files (*.csv format). Each file size is ~5 MB and there are 2 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. Temperatures are in degrees Celsius, with a reading of -9999 indicating no data or erroneous data. |
|---|