Dated radar stratigraphy between Dome A and South Pole, East Antarctica, derived from AGAP North PASIN (2008-2009) and PolarGAP PASIN2 (2015-2016) surveys ...

• Main Authors: Sanderson, Rebecca, Ross, Neil, Winter, Kate, Bingham, Robert, Callard, Louise, Jordan, Tom, Young, Duncan
• Format: Dataset
• Language: English
• Published: NERC EDS UK Polar Data Centre 2023
• Subjects: "EARTH SCIENCE","CRYOSPHERE","GLACIERS/ICE SHEETS","ICE SHEETS"; "EARTH SCIENCE","CRYOSPHERE","SEA ICE","ICE DEPTH/THICKNESS"; "EARTH SCIENCE","CRYOSPHERE","SNOW/ICE","ICE DEPTH/THICKNESS"; "EARTH SCIENCE","CRYOSPHERE","GLACIERS/ICE SHEETS"; "EARTH SCIENCE","CRYOSPHERE","SNOW/ICE"; Dome A; East Antarctica; Englacial layering; Ice Penetrating Radar; South Pole; Antarctic; Antarc*; Antarctica; ice core; SCAR; Sea ice; South pole
• Online Access: https://dx.doi.org/10.5285/cfafb639-991a-422f-9caa-7793c195d316; https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01809

This dataset contains the position and depth (ice thickness) of three spatially-extensive Internal Reflecting Horizons (IRHs) mapped from ice-penetrating radar data acquired with the British Antarctic Survey's PASIN and PASIN2 ice radar systems across central East Antarctica. The dataset extends geographically from Dome A to South Pole. Using previous dated IRHs from Winter et al (2019), an independent validation of IRH ages from the South Pole ice-core chronology and a 1-D steady-state model, we assigned ages to our three IRHs: (H1) 38.5 +/- 2.2 ka, (H2) 90.4 +/- 3.57, and (H3) 161.9 +/- 6.76 ka. This study was motivated by the AntArchitecture Action Group of the Scientific Committee for Antarctic Research (SCAR). The project was supported by the National Environmental Research Council (NERC)-funded ONE Planet Doctoral Training Partnership (NE/S007512/1), hosted jointly by Newcastle and Northumbria Universities. The authors thank the BAS science and logistics teams for acquiring both the AGAP PASIN and ... : Instrumentation and Processing: The primary radar dataset used (AGAP North) was acquired with the British Antarctic Survey's PASIN system. The AGAP survey was flown over the Gamburtsev Province and the interior of East Antarctica in the 2008/9 Antarctic field season (Bell et al. 2011; Corr et al. 2021). Radar data were collected using the PASIN ice penetrating radar system mounted on the BAS Twin Otter aircraft 'VP-FBL'. The operating centre frequency was 150 MHz, and the system used two interleaved pulses: a 4-microseconds, 10 MHz bandwidth linear chirp for deep sounding and a 0.1-microseconds unmodulated pulse for shallow sounding. Further details of the processing applied can be found at Corr et al. (2021) and Fremand et al. (2022). The second radar dataset used was acquired with the British Antarctic Survey's PASIN2 system. Data were acquired during the ESA PolarGAP survey (PolarGap: 'Filling the GOCE polar gap in Antarctica and ASIRAS flight around South Pole' https://doi.org/10.5270/esa-8ffoo3e, ...