ECOSSE Subsea Systems - Subsea UK

ECOSSE Subsea Systems - Subsea UK

Arctic and deep trenching, backround

• Ice runs aground in shallow water in the Arctic seas, and cuts into the

seabed as it is pushed further by wind, current, and the pressure of other

ice. Dramatic patterns of seabed gouges are revealed by side-scan sonar.

Often the gouges are several metres deep. Repetitive gouge mapping

confirms that gouging is a contemporary process, rather than a relic from

earlier periods in which the water level and the ice climate were different

(Chua, Palmer, Tjiawi)

• Soft clays

• Stiff and hard clays

• Glacial till

• Bedrock

• Steep slopes and complicated morphology

‘because we think differently....’

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