Zeising, Ole; Eisen, Olaf; Hofstede, Coen Matthijs; Brisbourne, Alex; Anandakrishnan, Sridhar: Raw data of vibroseismic measurements on Thwaites Glacier, Antarctica from 2023/24 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.987694 (dataset in review), In: Zeising, O et al.: Vibroseismic measurements on Thwaites Glacier, Antarctica from 2023/24 [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.987693 (dataset in review)
Abstract:
This vibroseismic survey was conducted on Thwaites Glacier in West Antarctica in 2023/24, as part of the International Thwaites Glacier Collaboration's project GHOST (Geophysical Habitat of Subglacial Thwaites). In 2023/24, a 134 km long seismic profile (section 20240551) was measured perpendicular to the flow direction. The seismic source was generated by a seismic vibrator (Industrial Vehicles Inc. EnviroVibe) that was placed on a polyethylene sled and towed by a snow tractor (Eisen et al., 2015). The seismic vibrator was operated at 60% peak force (40 kN) with a shot interval of 75 m. At every shot location, we performed two sweeps. The first sweep (setup sweep) was used for snow densification and not recorded while the second sweep (acquisition sweep) was recorded with a 1500 m long snowstreamer towed behind the seismic vibrator. The frequency range was 10–200 Hz. The up-sweep length was 10 s, with 0.5 s tapering at begin and end. The snowstreamer consists of 60 channels with a 25 m group spacing and a minimum offset of 43 m. The eight gimballed p-wave geophones per channel recorded for 14 s at a sampling interval of 0.5 ms. With this set-up, we collected ten-fold data. The profile was collected from west to east. This dataset contains the recorded raw vibroseismic data in standard SEG-Y format, compressed by a cross-correlation with a synthetic source signal. The individual traces were assigned idealized geometry of shot locations. The shot coordinates include surface elevation relative to WGS84 based on ice surface heights that we measured with a GNSS system at the source.
The seismic source was a seismic vibrator "EnviroVibe" (Industrial Vehicles Inc.) The returned wave was measured with a 1.5 km long "snow streamer" (Fjord Instruments) with 60 channels and 25 m spacing. Each channel consisted of 8 geophones with 3.125 m spacing. The distance from the source to the first geophone was 30.5 m. The signal was recorded with 3 "Geodes" (Geometrics Inc). The seismic raw data were processed to the different levels with Paradigm Echos (Aspen Technology Inc.). GNSS data at every shot location were recorded with a Novatel Flexpak via a GNSS antenna located on the roof of the seismic vibrator.
Keyword(s):
Supplement to:
Zeising, Ole; Eisen, Olaf; Hofstede, Coen Matthijs; Brisbourne, Alex; Agnew, Ronan; Hoffman, A; Anandakrishnan, Sridhar (preprint): Hard rocks and deep wetlands: characterizing the bed of Thwaites Glacier, Antarctica, from vibroseismic measurements. https://doi.org/10.21203/rs.3.rs-7638739/v1
Related to:
Eisen, Olaf; Hofstede, Coen Matthijs; Diez, Anja; Kristoffersen, Yngve; Lambrecht, Astrid; Mayer, Christoph; Blenkner, Rick; Hilmarsson, Sverrir Æ (2015): On-ice vibroseis and snowstreamer systems for geoscientific research. Polar Science, 9(1), 51-65, https://doi.org/10.1016/j.polar.2014.10.003
Regnery, Julia; Heitland, Tim; Wesche, Christine (2025): Expeditions to Antarctica: Ant-Land 2023/24 NEUMAYER STATION III, Kohnen Station and Field Campaigns. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 796, 176 pp, https://doi.org/10.57738/BZPM_0796_2025
Funding:
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_ANT_31: Thwaites
National Science Foundation (NSF), grant/award no. NSF-PLR-1738934: Geophysical Habitat of Subglacial Thwaites (GHOST)
Natural Environment Research Council (NERC), grant/award no. NE/S006613/1: Geophysical Habitat of Subglacial Thwaites (GHOST)
Natural Environment Research Council (NERC), grant/award no. NE/S006621/1: Geophysical Habitat of Subglacial Thwaites (GHOST)
Natural Environment Research Council (NERC), grant/award no. NE/S006672/1: Thwaites Offshore Research project, a component of the International Thwaites Glacier Collaboration
Coverage:
Median Latitude: -76.396612 * Median Longitude: -105.508876 * South-bound Latitude: -76.444155 * West-bound Longitude: -108.026633 * North-bound Latitude: -76.349069 * East-bound Longitude: -102.991120
Date/Time Start: 2023-12-31T03:16:00 * Date/Time End: 2024-01-09T01:47:00
Event(s):
Thwaites_Glacier_2023-2024 * Latitude Start: -76.444155 * Longitude Start: -108.026633 * Latitude End: -76.349069 * Longitude End: -102.991120 * Date/Time Start: 2023-12-31T03:16:00 * Date/Time End: 2024-01-09T01:47:00 * Campaign: ANT-Land_2023_ITGC-GHOST * Basis: AWI Antarctic Land Expedition
Comment:
If you have questions, please contact Ole Zeising (ole.zeising@awi.de) or co-authors.
Data were acquired in the field by: Ole Zeising, Coen Hofstede and Olaf Eisen.
Data processing was done by Ole Zeising.
This survey has been implemented by Alex Brisbourne and Sridhar Anandakrishnan as part of the ITGC-GHOST Project.
The authors would like to thank Aspen Technology, Inc. for providing software licenses and support.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Zeising, Ole | |||
| 2 | File content | Content | Zeising, Ole | |||
| 3 | Binary Object | Binary | Zeising, Ole | Seismic vibrator, Industrial Vehicles Inc., EnviroVibe; measured with snow streamer, Fjord Instruments | ||
| 4 | Binary Object (File Size) | Binary (Size) | Bytes | Zeising, Ole | Seismic vibrator, Industrial Vehicles Inc., EnviroVibe; measured with snow streamer, Fjord Instruments |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 1 (ProcLevel1)
Size:
6 data points