Subglacial Lake Ellsworth, 2007/08 shallow ice core for density measurements
GB/NERC/BAS/PDC/00349
Abstract:
Analysis of shallow ice cores collected in the region of subglacial Lake Ellsworth. Three cores drilled to ~20 m depth. Two cores returned to UK for analysis. One core measured for density-depth in the field, then discarded.
One of the two cores returned to UK has been sent to Bristol University for major anion/cation analysis; the other core is at the British Antarctic Survey (BAS) and will be analysed for accumulation rate.
Density analysis is complete. Chemical analysis is complete. Accumulation analysis is in progress.
Citation:
Smith, A., Ross, N., & Woodward, J. (2019). Subglacial Lake Ellsworth, 2007/08 shallow ice core for density measurements (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/0aed0330-82f2-4c5c-8c4c-03742653b37e
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License
| Use: | Data released under Open Government Licence V3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ |
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Basic Information
| Creation Date: | 2008-11-25 |
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| Dataset Progress: | In Work |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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Additional Information
| Reference: | Smith, A.M., J. Woodward, N. Ross, M.J. Bentley, D.A. Hodgson, M.J. Siegert, E.C. King, 2018. Evidence for the long-term sedimentary environment in an Antarctic subglacial lake, Earth and Planetary Science Letters, doi:10.1016/j.epsl.2018.10.011. Siegert, M., Clarke, R.J., Mowlem, M., Ross, N., Hill, C.S., Tait, A., Hodgson, D., Parnell, J., Tranter, M., Pearce, D., Bentley, M.J., Cockell, C., Tsaloglou, M-N., Smith, A.M., Woodward, J., Brito, M.P., and Waugh, E. (2012), Clean access, measurement and sampling of Ellsworth Subglacial Lake: a method for exploring deep Antarctic subglacial lake environments, Reviews of Geophysics, 50, RG1003, doi:10.1029/2011RG000361 Ross, N., Siegert, M.J., Woodward, J., Smith, A.M., Corr, H.F.J., Bentley, M.J., Hindmarsh, R.C.A., King, E.C., and Rivera, A., (2011). Holocene stability of the Amundsen-Weddell ice divide, West Antarctica, Geology, 39, 935-938, doi:10.1130/G31920.1 Ross, N., Siegert, M.J., Rivera, A., Bentley, M.J., Blake, D., Capper, L., Clarke, R., Cockell, C.S., Corr, H.F.J., Harris, W., Hill, C., Hindmarsh, R.C.A., Hodgson, D.A., King, E.C., Lamb, H., Maher, B., Makinson, K., Mowlem, M., Parnell, J., Pearce, D. A., Priscu, J., Smith, A.M., Tait, A., Tranter, M., Wadham, J.L., Whalley, W. B., and Woodward, J., (2011), Ellsworth Subglacial Lake, West Antarctica: A review of its history and recent field campaigns, in Antarctic Subglacial Aquatic Environments, Geophys. Monogr. Ser., vol. 192, edited by M. J. Siegert, M. C. Kennicutt II, and R. A. Bindschadler, pp. 221-233, doi:10.1029/2010GM000936, AGU, Washington, D. C. Thoma, M., Grosfeld, K., Mayer, C., Smith, A.M., Woodward, J., and Ross, N., (2011). The "tipping" temperature within Subglacial Lake Ellsworth, West Antarctica and its implications for lake access, The Cryosphere, 5, 561-567, doi:10.5194/tc-5-561-2011 Woodward, J., Smith, A.M., Ross, N., Thoma, M., Corr, H.F.J., King, E.C., King, M.A., Grosfeld, K., Tranter, M., and Siegert, M.J., (2010). Location for direct access to subglacial Lake Ellsworth: An assessment of geophysical data and modelling. Geophysical Research Letters, 37, L11501. doi:10.1029/2010GL042884 Woodward, J., Siegert, M.J., Smith, A.M., Ross, N. (2011) Subglacial Lake Ellsworth. In: Encyclopedia of Snow Ice and Glaciers (eds.) Singh, V.P., Singh, P., and Haritashya, U.K. Project references: AFI 07/02 - Geophysical exploration of a West Antarctic subglacial lake. Linked programme: British Antarctic Survey (BAS) programme: Glacial Retreat in Antarctica and Deglaciation of the Earth System (GRADES). Scientific Committee on Antarctic Research (SCAR) Subglacial Antarctic Lake Exploration (SALE) programme. Linked projects: GRADES-IMAGE: Inverse Modelling of Antarctica and Global Eustasy GRADES-TIGRIS: TargetIng Glacial Retreat and Ice-stream Systems |
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| Quality: | Estimated error in calculated density mostly of the order +/-30 kg/m^3 | |
| Lineage/Methodology: | Core drilled to just over 20 m depth using PICO hand drill. Core quality - good Core diameter between 70-80 mm Core cut into a total of 94 sections; mean section length 21.6 cm For each section, length and diameter were measured with ruler and calipers, respectively. For each section, mass measured with an electronic balance. |
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Extent
| Temporal Coverage: | |
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| Start Date | 2007-12-28 |
| End Date | 2007-12-28 |
| Start Date | 2008-01-21 |
| End Date | 2008-01-21 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -78.977 |
| Northernmost | -78.977 |
| Longitude | |
| Westernmost | -90.514 |
| Easternmost | -90.514 |
| Altitude | |
| Min Altitude | 1924 m |
| Max Altitude | 1924 m |
| Depth | |
| Min Depth | 0 m |
| Max Depth | 20 m |
| Location: | |
| Location | Antarctica |
| Detailed Location | Subglacial Lake Ellsworth, Southern Ellsworth Land |
Instrumentation
| Data Collection: | Field notebooks + analyses held at the British Antarctic Survey (BAS) and Bristol University Date drilled and measured: 28 December 2007 (depth 0-15 m) 21 January 2008 (depth 15-20 m) |
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Storage
| Distribution: | |
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| Distribution Media | Various Online Data Transfer method |
| Distribution Size | 1.3 kB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | Single annotated CSV file containing depth and density data. |