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Downhole distributed acoustic seismic profiles at SkyTrain Ice Rise, West Antarctica, January 2020

A distributed acoustic sensing (DAS) experiment was undertaken at SkyTrain Ice Rise in the Weddell Sea Sector of West Antarctica. The aim was to evaluate the use of DAS technology using existing infrastructure and for delineating the englacial fabric to improve our understanding of ice sheet history in the region. Three walkaway profiles were acquired at 45 degree intervals using a hammer and plate source. Both direct and reflected P- and S-wave energy, as well as surface wave energy, are observed using a range of source offsets recorded using fibre optic cable. Significant noise results from the cable hanging untethered in the borehole. At greater depth, where drilling fluid is present, signal strength is sufficient to measure seismic interval velocities and attenuation.

Fieldwork was part of the BEAMISH Project (NERC AFI award numbers NE/G014159/1 and NE/G013187/1). John Michael Kendall was supported by additional funding from NERC award No. CASS-166. The Skytrain borehole and fibre optic cable are part of the University of Cambridge WACSWAIN Project (EU Horizon 2020 agreement No. 742224).

Simple

Alternate title
Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01458
Date (Publication)
2021-01-29
Identifier
http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01458
Custodian
  British Antarctic Survey
High Cross, Madingley Road , Cambridge , CB3 0ET , UK
+44 (0)1223 221400
Originator
  Polar Data Centre,Natural Environment Research Council,UK Research & Innovation - Brisbourne, Alex;Kendall, Mike
High Cross, Madingley , Cambridge , CB3 0ET , UK
+44 (0)1223 221400
Maintenance and update frequency
unknown Unknown
Keywords
  • NDGO0001
NERC OAI Harvesting
  • NERC_DDC
GCMD Parameter Valids
  • EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets
  • EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion
BAS Free-text keywords
  • Antarctica
  • Distributed acoustic sensing - DAS
  • Ice rise
  • Vertical Seismic Profile - VSP
Use limitation
This data is supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
Access constraints
otherRestrictions Other restrictions
Other constraints
This data is supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
Metadata language
EnglishEnglish
Topic category
  • Environment
  • Geoscientific information
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Begin date
2020-01-24
End date
2020-01-24
Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326
Distribution format
Distributor
  Polar Data Centre - British Antarctic Survey
+44 (0)1223 221400
OnLine resource
https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=99f0d269-d8fa-48e0-89e6-358486d82330
Hierarchy level
dataset Dataset

Domain consistency

Measure identification
INSPIRE / Conformity_001

Conformance result

Date
Explanation
See the referenced specification
Pass
No
Statement
The fibre optic cable is deployed in an open borehole with drilling fluid in the lower half (approximately). The cable is not frozen-in to the hole or to the wall of the hole. The signal in the upper half, which hangs in air, is therefore dominated by harmonic noise and weak coupling. Signal from the lower half, which sits in the drilling fluid, is stronger and noise levels are lower.
File identifier
GB_NERC_BAS_PDC_01458 XML
Metadata language
EnglishEnglish
Hierarchy level
dataset Dataset
Date stamp
2021-01-29
Metadata standard name
NERC profile of ISO19115:2003
Metadata standard version
1.0
Point of contact
  British Antarctic Survey
+44 (0)1223 221400
Dataset URI
http://www.antarctica.ac.uk/dms/metadata.php?id=GB/NERC/BAS/PDC/01458
 
 

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Keywords


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