National Oceanography Centre Contribution to WB3 Dr Peter Talling - - PowerPoint PPT Presentation

National Oceanography Centre Contribution to WB3

Dr Peter Talling Dr James Hunt Dr Russell Wynn

National Oceanography Centre

NATURAL ENVIRONM ENT RESEARCH COUNCIL

WB2 Contribution

National Oceanography Centre research has demonstrated the recurrence of landslide-generated turbidites in marine basins:

• Northeast Atlantic continental margin
• Canary Islands
• Mediterranean

Research thus far indicates recurrence of landslide-generated turbidites is NOT serially dependent, NOR directly linked to sea level change or sedimentation rates. A Poisson-process (random) is invoked as the trigger, implicating regional earthquakes.

Piston core coverage of Northeast Atlantic

National Oceanography Centre

NATURAL ENVIRONM ENT RESEARCH COUNCIL

WB3 Contribution

The deposits from these landslide-generated turbidites have provided insights into the mechanics of the original landslide. These parameters have an influence on tsunamigenesis.

E.g. Canary Islands

• Provide ages and full volume estimates of landslides
• Landslides are multistage collapses
• Retrogressive with initial most voluminous collapses submarine
• Often rapidly disaggregate into blocks and sediment flows
• Headwall scarps are 50-150m high

NOC have a 2 year PDRA to investigate modelling of these events NOC have a National Capabilities cruise to offshore Tenerife to further investigate multi-stage collapses

National Oceanography Centre

NATURAL ENVIRONM ENT RESEARCH COUNCIL

WB3 Contribution

Research contributions from the NOC can provide information

• n the timing and mechanisms of landslides from:
• Canary Islands
• Northwest African and Southwest Iberian Margins
• Eastern Mediterranean
• Norwegian and Greenland Margins

The Canary Island and Southwest Iberian research will best aid investigating the Southwest Iberian test sites. Details from our work in the Eastern Mediterranean and Arctic may also aid investigations into test sites in those locations.

Will climate change in the Arctic increase the landslide-tsunami risk to the UK?

Talling (PI), Hunt (PM), Horsburgh, Wynn, Masson & Challenor1, Long, Tappin, Baptie & Musson2, McCloskey, Dunlop & Nalbant3, Piggott, Allison & Collins4, Distaso5, Zervos, Priest & Clayton6, Dowdeswell7, Willis 8, Rogers, Stansby & Cunningham9, S. Dawson10, A. Dawson11.

1National Oceanography Centre, 2British Geological Survey, Edinburgh & Keyworth, 3School of Environmental Sciences, University

• f Ulster, 4Department of Earth Science and Engineering, Imperial College London, 5Grantham Institute for Climate Change,

Imperial College 6Civil Engineering, University of Southampton, 7Scott Polar Research Institute, University of Cambridge, 8Willis,

9School of Mechanical, Aerospace and Civil Engineering, University of Manchester, 10 Department of Geography, University of

Dundee, 11 Institute for Coastal Science & Management, University of Aberdeen

National Oceanography Centre

NATURAL ENVIRONM ENT RESEARCH COUNCIL

Project Structure (£2.3Million)

Work Block 1: Submarine landslide recurrence / Cruise in 2014 Work Block 2: Tsunami deposits – Do all slides generate tsunamis? Work Block 3: Future trends in earthquakes as ice melts Work Block 4a: Continental slope stability modelling Work Block 4b: Gas hydrates and sediment strength Work Block 5: Landslide wave generation, tsunami propagation, and inundation modelling Work Block 6a: Societal cost of inundation Work Block 6b: Stakeholder and UK coastal flood policy

ASTARTE WB2 ASTARTE WB3