f2de31af-9f83-44f8-9584-f0190a2cc3eb eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2021-01-26 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Dated radar stratigraphy of the Pine Island Glacier catchment (West Antarctica) derived from BBAS-PASIN (2004-05) and OIB-MCoRDS2 (2016/2018) surveys 2021-01-26 creation 2021-01-26 revision 2021-01-26 publication 2021-01-26 released 1.0 https://doi.org/10.5285/f2de31af-9f83-44f8-9584-f0190a2cc3eb doi GB/NERC/BAS/PDC/01459 https://data.bas.ac.uk/ NE/L002558/1 award Please cite this item as: Bodart, J., Bingham, R., Ashmore, D., Karlsson, N., Hein, A., & Vaughan, D. (2021). Dated radar stratigraphy of the Pine Island Glacier catchment (West Antarctica) derived from BBAS-PASIN (2004-05) and OIB-MCoRDS2 (2016/2018) surveys (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/f2de31af-9f83-44f8-9584-f0190a2cc3eb This dataset contains the position and depth of four spatially-extensive Internal Reflecting Horizons (or IRHs) traced on the British Antarctic Survey's PASIN system and NASA Operation IceBridge's MCoRDS2 system across the Pine Island Glacier catchment. Using the WAIS Divide ice-core chronology and a 1-D steady-state model, we assign ages to our four IRHs: (R1) 2.31-2.92 ka, (R2) 4.72 +/- 0.28 ka, (R3) 6.94 +/- 0.31 ka, and (R4) 16.50 +/- 0.79 ka. This project was funded by the UK Natural Environment Research Council Grant NE/L002558/1 No credit. completed Bodart, Julien University of Edinburgh Researcher author Bingham, Robert University of Edinburgh Researcher author Ashmore, David University of Liverpool Researcher author Karlsson, Nanna Geological Survey of Denmark and Greenland Researcher author Hein, Andrew University of Edinburgh Researcher author Vaughan, David British Antarctic Survey Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets EARTH SCIENCE > Spectral/Engineering > Radar theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Englacial Stratigraphy Holocene ITGC Ice Penetrating Radar Pine Island Glacier Thwaites Glacier West Antarctica theme Pine Island Glacier Antarctica place Elevation theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/ otherRestrictions . Further by downloading this data the user acknowledges that they agree with the NERC data policy (), and the following conditions: 1. To cite the data in any publication as follows: Bodart, J., Bingham, R., Ashmore, D., Karlsson, N., Hein, A., & Vaughan, D. (2021). Dated radar stratigraphy of the Pine Island Glacier catchment (West Antarctica) derived from BBAS-PASIN (2004-05) and OIB-MCoRDS2 (2016/2018) surveys (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/F2DE31AF-9F83-44F8-9584-F0190A2CC3EB 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. url url largerWorkCitation url url crossReference textTable eng utf8 climatologyMeteorologyAtmosphere geoscientificInformation -112.9 -72.7 -81.1 -73.5 2004-12-11 2005-01-21 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor text/plain bytes 125829120 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=f2de31af-9f83-44f8-9584-f0190a2cc3eb WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Instrumentation and Processing: The main radar data is from the British Antarctic Survey's PASIN system, flown over Pine Island Glacier in the austral season 2004-05. Data were collected with two interleaved radar modes.The first was a deep-sounding, 150 MHz centre-frequency, 4-microseconds, 10 MHz chirp mode and the second was a 150 MHz, 0.1-microseconds pulse mode designed to image shallow IRHs but from which we are also able to recover IRHs deeper (~2 km) in the ice column. The second radar dataset used here is from NASA Operation IceBridge's MCoRDS2 system, flown in two separate surveys over Pine Island Glacier and nearby Thwaites and Institute Ice Stream catchments in 2016 and 2018. The system operated at a centre frequency of 190 MHz and a 50 MHz bandwidth. We used the CReSIS L1B standard products, produced with pulse compression, focused-SAR processing and along-track motion compensation. For the purposes of increasing IRH traceability on the PIG-PASIN data, we quadratically detrended each radar trace, normalised each pixel in a moving vertical window, and then applied a 10-trace horizontal average to reduce incoherent noise. For both the PIG-PASIN and the OIB-MCoRDS2 data, we removed the air-to-ice two-way travel time and shifted the surface elevation to time zero, prior to exporting the data to standard 2-D SEG-Y format for data interpretation. We conducted our IRH tracing in the Schlumberger Petrel 3-D seismic software using a semi-automated tracing algorithm that uses an adjustable window to track the local maxima of received reflected power between traces. Methodology and Results: We identified four prominent Internal Reflecting Horizons (or IRHs) that we term R1-4 in the PASIN and MCoRDS2 radar data. The upper three IRHs (R1-3) were chosen on the basis of high spatial continuity and high signal-to-noise ratio (SNR). We used available crossovers between radar profiles as calibration points to trace the IRHs and relied upon the distinctiveness of our IRHs when tracing between crossovers (see Bodart et al., 2021 for more details). We converted all our IRHs from time domain to depth using a value for the speed of electromagnetic waves through ice of 168.5 m/microseconds and applied a 10 m spatially-invariant firn correction. All our depth measurements are given in depth below the surface (set at 0 m). The maximum uncertainty for the IRHs traced on the PASIN data is +/- 17 m, and +/- 14 m on the IRHs traced on the MCoRDS2 data. More details on how these were calculated can be found in Bodart et al. (2021). The IRHs were dated using intersection with the WAIS divide ice-core and with the use of a steady-state 1-D vertical-strain model. Data Structure: Each CSV file contains six columns: (1) 'X' is the Cartesian x-coordinates in Polar Stereographic South (EPSG: 3031, -71 S) (units: meters). (2) 'Y' is the Cartesian y-coordinates in Polar Stereographic South (EPSG: 3031, -71 S) (units: meters). (3) 'Lon' is the longitudinal coordinate in WGS84 (EPSG: 4326) (units: degrees). (4) '''Lat' is the latitudinal coordinate in WGS84 (EPSG: 4326) (units: degrees). (5) 'Pick' is the pixel number below the ice surface of the radargram of that IRH. (6) 'Depth' is the depth of the IRH below the ice surface (units: meters). (7) 'RadarIceThick' is the ice thickness detected by the radar (units: meters). Missing values for radar ice thickness are shown as NaN. (8) 'FlightID' is the radar flight line number or segment. More information on the naming convention used for the CSVs can be found under 'Storage'. Data collection: BBAS/AGASEA PASIN survey: season 2004-05 NASA/OIB MCoRDS2 surveys: seasons 2016 and 2018 Data quality: Uncertainties in IRH depths can be found in the Lineage section and in the paper. Missing values for radar ice thickness are shown as NaN. asNeeded completed