Tags: Dave Smith

Deploying the Sparker

Carol Cotterill and Dave Smith deploy the sparker, which uses acoustic pulses to image the sea bed and sediments below the sea bed. Video: Matt Wainwright.

  • By Carol Cotterill
  • Thursday 2 Oct, 16:45
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Sparker

Sparker unit deployed by the British Geological Survey team

Sparker unit deployed by Carol Cotterill and Dave Smith, the British Geological Survey team, to image the sea-bed using seismic technology.

Success!


Photo by Nathan Gallagher

Success! We started the day with a sail up to the Jakobshavn Isbrae ice field, created by the grounding of icebergs from the glacier against a recessional moraine.

The glacier itself “flows” approximately 38m per day. However it only calves every 2 – 3 weeks according to local knowledge. This combination – fast flow rates and long periods between calving events results in very large bergs being discharged – see some of the attached photos!
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Surveying the seabed

The BGS experience difficulty surveying the seabed. Carol Cotterill describes how this feels. Audio by Vicky Long.

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An MP3 version is also available to download.
  • By Vicky Long
  • Sunday 28 Sep, 22:10
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Danger, Danger: High Voltage

Carol explains the kit she’ll be using during the voyage – the sparker unit – which uses acoustic pulses to image the sea bed and sediments below the sea bed. The ship’s acoustics leads to some initial frustration, followed by success!

  • By Carol Cotterill
  • Saturday 27 Sep, 17:10
  • Comments Off on Danger, Danger: High Voltage