Abstract:
Borehole temperature measurements from the upper 300 m of Rutford Ice Stream. A string of thermistors was installed into a hot-water drilled hole in February 2005. The string comprised 10 calibrated thermistors at approximately 30 m spacing. The temperature measurements provided were taken in February 2007, following ample time for the heat from the drilling process to have dissipated.
Keywords:
Borehole thermometry, RABID Project, Rutford Ice Stream, West Antarctica, ice stream,
Smith, A., Makinson, K., & Nicholls, K. (2020). Borehole thermometry data from Rutford Ice Stream, West Antarctica, 2007 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/1fd6ab5a-3139-4a12-99d3-2ba0c0213744
| Access Constraints: | No restrictions apply. |
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| Use Constraints: | These data are governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
| Creation Date: | 2020-06-25 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | UK PDC |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Andrew M Smith |
| Role(s) | Investigator, Technical Contact |
| Organisation | British Antarctic Survey |
| Name | Keith Makinson |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Keith Nicholls |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Tavi Murray |
| Role(s) | Investigator |
| Organisation | Swansea University |
| Name | Alberto Behar |
| Role(s) | Investigator |
| Organisation | Jet Propulsion Laboratory |
| Name | Brian E Barrett |
| Role(s) | Investigator |
| Organisation | Swansea University |
| Parent Dataset: | N/A |
| Reference: | Barrett, B.E., K.W. Nicholls, T. Murray, A.M. Smith, D.G. Vaughan, 2009. Rapid recent warming on Rutford Ice Stream, West Antarctica, from borehole thermometry. Geophys. Res. Lett., 36, L02708 (doi:10.1029/2008GL036369). Smith, A.M., 2005. RABID: Basal conditions on Rutford Ice Stream, West Antarctica: Hot-water drilling and downhole instrumentation. British Antarctic Survey Field Report, R/2004/S3. BAS Archives Ref: AD6/2R/2004/S3 |
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| Quality: | Each thermistor was calibrated in a temperature-controlled water bath prior to deployment. Temperature-measurement accuracy was +/- 0.01 °C (Barret et al., 2009). The depth of each thermistor beneath the surface was accurate to better than +/- 10 cm at the time of installation. |
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| Lineage/Methodology: | In February 2005 a string of thermistors was lowered down the upper 300 m of a hot-water drilled borehole on Rutford Ice Stream (West Antarctica), once the drilling activities had been completed. Prior to deployment each thermistor had been calibrated. Wires to each thermistor extended down from the surface. The upper thermistor was positioned 15 m below the surface; below this, thermistors were spaced at 31.5 m intervals. Below ~60 m the hole was filled with water, above this it was air-filled. The top of the hole was then covered. Over time, the water in the borehole will have frozen and the excess heat remaining from the drilling activity will have dissipated. At various times over the following 2 years the temperature at the depth of each thermistor was determined by precise measurements of the resistance of each thermistor using the wires at the surface. The temperature measurements provided were taken in February 2007. | |
| Temporal Coverage: | |
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| Start Date | 2007-02-10 |
| End Date | 2007-02-10 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -78.14 |
| Northernmost | -78.14 |
| Longitude | |
| Westernmost | -83.92 |
| Easternmost | -83.92 |
| Altitude | |
| Min Altitude | ~ 330 m |
| Max Altitude | ~ 330 m |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Rutford Ice Stream |
| Sensor(s): |
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| Data Collection: | The thermistors used were 3K3A Betatherm. |
| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 154 B |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | One comma-separated variable file is provided, comprising two columns. In sequence, columns give: depth below surface (m), temperature (°C). |