Smith, Emma Clare; Kuhn, Gerhard; Gaedicke, Christoph; Drews, Reinhard; Ehlers, Todd A; Franke, Dieter; Hofstede, Coen Matthijs; Lambrecht, Astrid; Läufer, Andreas; Mayer, Christoph; Tiedemann, Ralf; Eisen, Olaf (2021): Sea floor depth under Ekström Ice Shelf, Antarctica, from seismic vibroseis surveys 2010-2018 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.931928
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Abstract:
Sea floor depth under Ekström Ice Shelf, Antarctica - from seismic reflection profiles collected between 2010 and 2018. For each seismic profile, the reflection time of the sea floor and ice-shelf base was identified and the depth to the sea floor was calculated using an ice velocity of 3601 m/s a sea-water velocity of 1451 m/s. The depths are referenced to mean sea-level (geoid EIGEN-6C4 ).
The seismic data used here were collected using two different seismic vibroseis sources. The same snow streamer was used for all data acquisition - a 1500 m long, 60 channel snow streamer, with 25 m group spacing. Each group contains eight gimballed P-wave SM-4, 14 Hz geo-phones.
Please note these data are the point data used to create the gridded bathymetry product of the region, found here: doi:10.1594/PANGAEA.907951
Details of data acquisition and processing are given here: doi:10.1029/2019GL086187.
Related to:
Smith, Emma Clare; Hattermann, Tore; Kuhn, Gerhard; Gaedicke, Christoph; Berger, Sophie; Drews, Reinhard; Ehlers, Todd A; Franke, Dieter; Gromig, Raphael; Hofstede, Coen Matthijs; Lambrecht, Astrid; Läufer, Andreas; Mayer, Christoph; Tiedemann, Ralf; Wilhelms, Frank; Eisen, Olaf (2020): Detailed seismic bathymetry beneath Ekström Ice Shelf, Antarctica: Implications for glacial history and ice‐ocean interaction. Geophysical Research Letters, https://doi.org/10.1029/2019GL086187
Smith, Emma Clare; Kuhn, Gerhard; Gaedicke, Christoph; Drews, Reinhard; Ehlers, Todd A; Franke, Dieter; Hofstede, Coen Matthijs; Lambrecht, Astrid; Läufer, Andreas; Mayer, Christoph; Tiedemann, Ralf; Eisen, Olaf (2019): Sea floor bathymetry under Ekström Ice Shelf, Antarctica, from a compilation of seismic vibroseis data. PANGAEA, https://doi.org/10.1594/PANGAEA.907951
Project(s):
Sub-EIS-Obs (Sub-EIS-Obs)
Coverage:
Median Latitude: -70.881950 * Median Longitude: -8.559084 * South-bound Latitude: -71.926822 * West-bound Longitude: -9.434380 * North-bound Latitude: -70.516119 * East-bound Longitude: -7.493685
Event(s):
Comment:
Seismic derived sea-floor depth picks
Data from AWI vibroseis seismic surveys ek2010, ek2011, ek2104, ek2017, ek2018
Details and data reference: Smith et. al, 2020
Brief processing notes: Seismic arrival times were converted to depth using an ice velocity of 3601m/s and a water velocity of 1451m/s. Depths were corrected for surface elevation using the REMA model, re-reference to the EIGEN6C4 Geoid, i.e. Bed = seismic depth - REMA surface elevation - geoid correction
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Number | No | Smith, Emma Clare | AWI seismic line number | ||
| 2 | LONGITUDE | Longitude | Smith, Emma Clare | Geocode | ||
| 3 | LATITUDE | Latitude | Smith, Emma Clare | Geocode | ||
| 4 | Bed elevation | Bed elev | m | Smith, Emma Clare | Corrected for surface elevation using the REMA model, re-reference to the EIGEN6C4 Geoid | Depth in m below mean sea level (EIGEN6C4 geoid), positive downwards |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
117684 data points
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