Abstract:
During the 2010/2011 Antarctic field season a collaborative NERC AFI (Antarctic Funding Initiative) project studying the basal boundary conditions of the Institute & Moller ice streams, West Antarctica, collected ~25,000 km of new high quality aerogeophysics data. Data were acquired using the BAS PASIN depth sounding radar mounted in the BAS aerogeophysically equipped Twin Otter "Bravo Lima".
Data are provided as XYZ ASCII line data.
Data were collected as part of the UK Natural Environment Research Council AFI grant NE/G013071/1.
Keywords:
Antarctic, aerogeophysical, ice thickness, radar, surface elevation
Ross, N., Corr, H., Bingham, R., Ferraccioli, F., Jordan, T., Le Brocq, A., Rippin, D., & Siegert, M. (2020). Processed bed elevation picks from airborne radar depth sounding across the Institute and Moller Glacier catchments in 2010/11 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/7946c497-72fc-41cb-a9b2-bf9980efe156
| Use Constraints: | This data is covered by a UK Open Government Licence (http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/) Further by downloading this data the user acknowledges that they agree with the NERC data policy (http://www.nerc.ac.uk/research/sites/data/policy.asp), and the following conditions: 1. To cite the data in any publication as follows: Ross, N., Corr, H., Bingham, R., Ferraccioli, F., Jordan, T., Le Brocq, A., Rippin, D., & Siegert, M. (2020). Processed bed elevation picks from airborne radar depth sounding across the Institute and Moller Glacier catchments in 2010/11 [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/7946C497-72FC-41CB-A9B2-BF9980EFE156 2. The user recognizes the limitations of data. Use of the data is at the users' own risk, and there is no warranty as to the quality or accuracy of any data, or the fitness of the data for your intended use. The data are not necessarily fully quality assured and cannot be expected to be free from measurement uncertainty, systematic biases, or errors of interpretation or analysis, and may include inaccuracies in error margins quoted with the data. |
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| Creation Date: | 2019-11-25 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | PDC BAS |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Mr Hugh Corr |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Dr Neil Ross |
| Role(s) | Investigator |
| Organisation | Newcastle University |
| Name | Dr Robert Bingham |
| Role(s) | Investigator |
| Organisation | University of Aberdeen |
| Name | Dr Fausto Ferraccioli |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Dr Tom A Jordan |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Dr Anne M Le Brocq |
| Role(s) | Investigator |
| Organisation | Exeter University |
| Name | Dr David Rippin |
| Role(s) | Investigator |
| Organisation | University of York |
| Name | Prof Martin Siegert |
| Role(s) | Investigator |
| Organisation | Bristol Glaciology Centre, University of Bristol |
| Parent Dataset: | N/A |
| Reference: | Jordan, T.A., Ferraccioli, F., Ross, N., Corr, H.F.J., Leat, P.T., Bingham, R.C., Rippin, D.M., Le Brocq, A & Siegert, M.J. 2010. Inland extent of the Weddell Sea Rift imaged by new aerogeophysical data. Tectonophysics, 585, 137-160. https://doi.org/10.1016/j.tecto.2012.09.010 Corr, H., Ferraccioli, F., Frearson, N., Jordan, T.A., Robinson, C., Armadillo, A., Caneva, G., Bozzo, E. & Tabacco, I.E., 2007. Airborne Radio-Echo Sounding of the Wilkes Subglacial Basin, the Transantarctic Mountains, and the Dome C Region. in The Italian-British Antarctic Geophysical and Geological Survey in Northern Victoria Land 2005-06-Towards the International Polar Year 2007-08., pp. 55-63, eds. Bozzo, E. & Ferraccioli, F. Terra Antartica Reports. Ross, N., Bingham, R.G., Corr, H.F.J., Ferraccioli, F., Jordan, T.A., Le Brocq, A., Rippin, D.M., Young, D., Blankenship, D.D & Siegert, M. 2010. Steep reverse bed slope at the grounding line of the Weddell Sea sector in West Antarctica. Nature Geoscience, 5, 393-396. DOI: 10.1038/NGEO1468 Ross, N., Jordan, T.A., Bingham, R.G., Corr, H.F.J., Ferraccioli, F., Le Brocq, A., Rippin, D.M., Wright, A.P. & Siegert, M.J. 2012. The Ellsworth Subglacial Highlands: Inception and retreat of the West Antarctic Ice Sheet. Geological society of America Bulletin, doi:10.1130/B30794.1 Processing references: Corr, H., Ferraccioli, F., Frearson, N., Jordan, T.A., Robinson, C., Armadillo, A., Caneva, G., Bozzo, E. & Tabacco, I.E., 2007. Airborne Radio-Echo Sounding of the Wilkes Subglacial Basin, the Transantarctic Mountains, and the Dome C Region. in The Italian-British Antarctic Geophysical and Geological Survey in Northern Victoria Land 2005-06-Towards the International Polar Year 2007-08., pp. 55-63, eds. Bozzo, E. & Ferraccioli, F. Terra Antartica Reports. Ross, N., Bingham, R.G., Corr, H.F.J., Ferraccioli, F., Jordan, T.A., Le Brocq, A., Rippin, D.M., Young, D., Blankenship, D.D & Siegert, M. 2010. Steep reverse bed slope at the grounding line of the Weddell Sea sector in West Antarctica. Nature Geoscience, 5, 393-396. DOI: 10.1038/NGEO1468 Ross, N., Jordan, T.A., Bingham, R.G., Corr, H.F.J., Ferraccioli, F., Le Brocq, A., Rippin, D.M., Wright, A.P. & Siegert, M.J. 2012. The Ellsworth Subglacial Highlands: Inception and retreat of the West Antarctic Ice Sheet. Geological society of America Bulletin, doi:10.1130/B30794.1 Fremand, A. C., Bodart, J. A., Jordan, T. A., Ferraccioli, F., Robinson, C., Corr, H. F. J., Peat, H. J., Bingham, R. G., and Vaughan, D. G.: British Antarctic Survey's aerogeophysical data: releasing 25 years of airborne gravity, magnetic, and radar datasets over Antarctica, Earth Syst. Sci. Data, 14, 3379-3410, https://doi.org/10.5194/essd-14-3379-2022, 2022. |
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| Quality: | Data collected with 7.5 km line spacing | |
| Lineage: | Radar data and details of survey design and location are presented in Ross et al. (2012). Radar data were collected using the PASIN radar echo sounding system (table 1 (Corr et al., 2007)). Data provided here includes picks of surface and ice sheet bed elevation. Note a single flight may contain data from two or more SEGY files, identified in the SEGYname channel. Surface elevation is derived from radar altimeter for ground clearance < 750 m, and the PASIN system for higher altitudes. Full channel name definition is given in the description below. Note the ice thickness over regions of thinner ice was independently picked a second time with different processing parameters. This additional ice thickness data is also available. In the database split by line the sections are defined as follows L= main survey grid lines, T=main survey grid lines, P=long transits, D=turns. Name Description Date UTC date (YYYY/MM/DD) Time UTC time (HH:MM:SS.SS) FlightID Sequential flight number and survey ID e.g. W12 Line_no Line Number e.g. LW200.1 Lon Longitude WGS 1984 Lat Latitude WGS 1984 x x projected meters * y y projected meters * Height_WGS1984 Aircraft altitude (meters) in WGS 1984 segy_name Radar_segy file name. TraceNum Radar segy trace number. PriNum Raw radar time. surfPickLoc Location down trace of surface pick. bedPickLoc Location down trace of bed elevation pick. botPickLoc_thin Location down trace of bed elevation pick for thin ice. surfElev Surface elevation (m) bedElev_thin Ice bed elevation for thin ice bed pick (m) bedElev Ice bed elevation, derived by subtracting tice from surfElev (m) Bed_merge A merge of bedElev and bedElev_thin (m) tIce Ice thickness, derived from bedPickLoc and surfPickLoc. (m) tice_thin Ice thickness in regions of thin ice (m) * Projected coordinates (x and y) are in Lambert conic conformal with two standard parallels defined as follows: Latitude of false origin: -82 Longitude of false origin: -14 Latitude of 1st standard parallel -84 Latitude of 2nd standard parallel -80 False easting 2000000 False northing 2000000 |
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| Temporal Coverage: | |
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| Start Date | 2010-12-20 |
| End Date | 2011-01-09 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -84.11 |
| Northernmost | -75.3 |
| Longitude | |
| Westernmost | -108.9 |
| Easternmost | -58.7 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Data Resolution: | |
| Latitude Resolution | N/A |
| Longitude Resolution | N/A |
| Horizontal Resolution Range | 30 meters - < 100 meters |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | The Institute and Moller Glacier |
| Sensor(s): |
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| Source(s): |
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| Data Collection: | Radar data were collected using the PASIN radar echo sounding system (table 1 (Corr et al., 2007)). |
| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 730 MB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | This dataset constains 1 ASCII XYZ file: - AFI_Radar_ByFlight.XYZ ~730MB |