Full Record - Borehole thermometry data from Rutford Ice Stream, West Antarctica, 2007

Borehole thermometry data from Rutford Ice Stream, West Antarctica, 2007

GB/NERC/BAS/PDC/01340

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.

Citation:
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 Data

License

Access:	No restrictions apply.
Use:	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/.

Authors

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

Basic Information

Creation Date:	2020-06-25
Dataset Progress:	Complete
Dataset Language:	English
ISO Topic Categories:	Climatology/Meteorology/Atmosphere Environment Geoscientific Information
Parameters:	Cryosphere > Glaciers/Ice Sheets > Ice Sheets Cryosphere > Snow/Ice > Snow/Ice Temperature

Additional Information

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
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.
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.

Extent

Temporal Coverage:
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

Instrumentation

Sensor(s):	THERMISTORS
Data Collection:	The thermistors used were 3K3A Betatherm.

Storage

Distribution:
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).