Abstract:
These are digital optical televiewer (OPTV) logs of four boreholes drilled by hot water to various depths (see Instrumented Borehole Info) in Khumbu Glacier, Nepal. Boreholes were drilled in May 2017 and 2018 to investigate the internal properties of Khumbu Glacier, specifically ice thickness, temperature, deformation and structure, as part of the NERC-funded 'EverDrill' research project.
Funding was provided by the NERC grant NE/P00265X/1 and NE/P002021/1.
Keywords:
Ice boreholes, Khumbu Glacier, Nepal, Optical televiewer
Hubbard, B., Miles, K., & Quincey, D. (2019). Borehole optical televiewer (OPTV) logs of boreholes drilled into Khumbu Glacier, Nepal, in 2017 and 2018 as part of EverDrill research project (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/d80f5c86-89a7-46d6-8718-47e3d34ab368
| Access Constraints: | No restrictions apply. |
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| 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 v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
| Creation Date: | 2019-01-11 |
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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 Polar Data Centre |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Bryn Hubbard |
| Role(s) | Investigator, Technical Contact |
| Organisation | Aberystwyth University |
| Name | Katie Miles |
| Role(s) | Investigator |
| Organisation | Aberystwyth University |
| Name | Duncan Quincey |
| Role(s) | Investigator |
| Organisation | University of Leeds |
| Parent Dataset: | N/A |
| Reference: | Hubbard, B., Roberson, S., Samyn, D., and Merton-Lyn, D., (2008), Digital optical televiewing of ice boreholes, Journal of Glaciology, 54: 823-30. | |
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| Quality: | Images are unaltered from those logged in the field. The OPTV technique is described in the referenced publication. | |
| Lineage: | The datasets are optical televiewer logs from four boreholes drilled to various depths (see Instrumented Borehole Info) in Khumbu Glacier, Nepal, in May 2017 and 2018. They were acquired using slimhole logging equipment manufactured by Robertson Geologging Ltd. | |
| Temporal Coverage: | |
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| Start Date | 2017-05-11 |
| End Date | 2018-05-05 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | 27.94 |
| Northernmost | 27.99 |
| Longitude | |
| Westernmost | 86.16 |
| Easternmost | 86.85 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | Nepal |
| Detailed Location | Khumbu Glacier, Himalaya |
| Data Collection: | Logs were acquired using Robertson Geologging OPTV probe, mini winch and Micrologger II. |
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| Data Storage: | The data are bitmap images (*.bmp format). Each borehole log is split into multiple sections. Each file size is between ~27 MB and ~138 MB. The file name consists of 'ED' for EverDrill, followed by the year, EverDrill site number, EverDrill borehole number, date of log, and whether the probe was recording whilst travelling up or down the borehole. |
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