Abstract:
In 2011, aerogeophysics data were acquired over Pine Island Glacier, West Antarctica on a grid comprising 30 transverse lines across the glacier, each around 20 km long, and with a spacing of roughly 500 m between the lines. The orientation of the lines was selected to be perpendicular to the surface features visible in satellite images in the central part of the ice shelf. Elevation of the ice-surface directly beneath the aircraft was simultaneously measured using a nadir-pointing laser altimeter.
We present here the processed bed elevation picks from airborne radar depth sounding collected using the BAS PASIN radar system.
Data are provided as XYZ ASCII line data.
Keywords:
Aerogeophysics, Antarctica, Radar, Surface elevation
Corr, H., & Vaughan, D. (2020). Processed ice shelf base picks from airborne radar depth sounding across the Pine Island Glacier Ice Shelf (2010-2011) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/e88f651c-3389-4d99-8333-07872dceab57
| 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: Corr, H., & Vaughan, D. (2020). Processed ice shelf base picks from airborne radar depth sounding across the Pine Island Glacier Ice Shelf (2010-2011) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/E88F651C-3389-4D99-8333-07872DCEAB57 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: | 2020-06-30 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
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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 | Prof David Vaughan |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Reference: | Main references: Vaughan, D. G., Corr, H. F. J., Bindschadler, R., Dutrieux, P., Gudmundsson, G. H., Jenkins, A., Newman, T., Vornberger, P., and Wingham, D. J. 2012. Subglacial melt channels and fracture in the floating part of Pine Island Glacier, Antarctica, Journal of Geophysical research, 117, 1-10, doi:10.1029/2012JF002360. Dutrieux, P., Vaughan, D. G., Corr, H. F. J., Jenkins, A., Holland, P. R., Joughin, I., and Fleming, A. H. 2013. Pine Island glacier ice shelf melt distributed at kilometre scales, The Cryosphere, 7, 1543-1555, doi:10.5194/tc-7-1543-2013. 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. |
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| Lineage: | Radar data and details of survey design and location are presented in Vaughan et al. (2012) and Dutrieux et al. (2013). 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. Channel description: Basic Channels 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, coordinate system defined on location page y y projected meters, coordinate system, defined on location page Height_WGS1984 Aircraft altitude (meters) in WGS 1984 Radar segy_name Radar_segy file name (BAS system). TraceNum Radar segy trace number (BAS system). PriNum Raw radar time (BAS system). surfPickLoc Location down trace of surface pick (BAS system). bedPickLoc Location down trace of bed elevation pick (BAS system). surfElev Surface elevation bedElev Ice bed elevation, derived by subtracting tice from surfElev tIce Ice thickness, derived from bedPickLoc and surfPickLoc. *Projected coordinates (x and y) are in Polar Stereographic: Latitude of natural origin: -71 Longitude of natural origin: 0 Scale factor at natural origin: 0.994 False easting 0 False northing 2072760.109 Positioning for the PIG mouth survey used a dual-frequency carrier-phase GPS (Vaughan et al., 2012). Positions are calculated for the phase centre of the aircraft antenna. All positions (Lat, lon and height) are referred to the WGS1984 ellipsoid. |
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| Temporal Coverage: | |
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| Start Date | 2011-01-13 |
| End Date | 2011-01-17 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -75.55974 |
| Northernmost | -74.93399 |
| Longitude | |
| Westernmost | -101.0475 |
| Easternmost | -99.65643 |
| 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 | Pine Island Glacier Ice Shelf |
| Sensor(s): |
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| Source(s): |
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| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 70MB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | This dataset constains 1 ASCII XYZ file: -PIG_Mouth_Radar.XYZ ~70MB |