Seismic bathymetry data, Antarctic Peninsula, Larsen C Ice Shelf, 2016
In 2016, a series of ice shelf cavity bathymetry point measurements were made across Larsen C Ice Shelf, West Antarctica. The sites were selected to address deficiencies in the coverage provided by existing data sets. A hammer and plate seismic source was used. Seismic reflection data were recorded...
| Main Authors: | , , |
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| Format: | Dataset |
| Language: | English |
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UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation
2019
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5285/315740b1-a7b9-4cf0-9521-86f046e33e9a https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01250 |
| Summary: | In 2016, a series of ice shelf cavity bathymetry point measurements were made across Larsen C Ice Shelf, West Antarctica. The sites were selected to address deficiencies in the coverage provided by existing data sets. A hammer and plate seismic source was used. Seismic reflection data were recorded on 24 receivers at 10 m interval and 30 m offset. Sea bed reflections are observed at all sites. Surface elevation measurements are provided to allow estimation of ice thickness when an ice base reflection is not visible. Funded as part of the Polar Science for Planet Earth Programme, British Antarctic Survey, Natural Environment Research Council. : The seismic reflection data were collected using a hammer and plate source into 24 surface receivers at 30 m offset and 10 m interval. At each site, around 20 single blow records were collected as well as an on-site stack of 10 hammer blows. Seismic data were recorded at 8 kHz sample rate. The Fresnel zone is dependent on ice and water column thickness and therefore site specific. The dual frequency GPS data were collected with a Trimble R7 GPS unit at each site to obtain an accurate surface elevation. : The seismic reflection data were collected with 1 x Geometrics Geode seismograph with 40 Hz vertical georods. The dual frequency GPS data were collected with a Trimble R7 GPS unit. : Raw data are provided and data quality can therefore be readily assessed. Data quality will vary from shot to shot due to the nature of using a hammer source. |
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