5-7 Oct.2009 All Regions Workshop #2

IBERIAN NODE

Jorge Miguel MirandaUniversity of Lisbon - IDL

jmiranda@fc.ul.pt

5-7 Oct.2009 All Regions Workshop #2

Objectives and frameworkThe Gulf of Cadiz, south of Algarve was chosen as an ESONET node, due to its interest to monitor Geo-hazards, Mud Volcanoes and Ocean Dynamics.

Objectives and framework

The seismicity of this area is the result of the tectonic activity along the Europe-Africa plate boundary.

5-7 Oct.2009 All Regions Workshop #2

Objectives and framework

5-7 Oct.2009 All Regions Workshop #2

From an oceanographic point of view the Gulf of Cadiz is of paramount importance for the study of the Mediterranean Outflow Water (MOW) because it affects the deep-water circulation on globalscale.

Objectives and framework

5-7 Oct.2009 All Regions Workshop #2

Objectives and frameworkExtensive mud volcanism, pockmarks, mud diapirism and carbonate chimneys related to hydrocarbon rich fluid venting are observed throughout the Gulf of Cadiz. Up to now 18 mud volcanoes, occurring at water depths between 700 and 3500 m, have been confirmed in this area by coring.

5-7 Oct.2009 All Regions Workshop #2

Scientific Questions

• (i) Set-up and operation of a monitoring seismic network in the Gulf of Cadiz for the evaluation and mitigation of natural hazards,

• (ii) monitor the temporal variation of the warm (13°) and saline (>37 g/l) Mediterranean Outflow Water (MOW); since the MWO is affecting the deep-water circulation on global scale its variations, measured in the Gulf of Cadiz, may anticipate climate change at the scale of tens of years;

• (iii) investigate the relative role of climate-controlled oceanographic variability and tectonic activity in the episodic formation and activity of fluid venting structures;

• (iv) study of the ecosystems associated with gas.

Proposed Location

5-7 Oct.2009 All Regions Workshop #2

5-7 Oct.2009 All Regions Workshop #2

Regional Studies

5-7 Oct.2009 All Regions Workshop #2

Local Studies

Location

5-7 Oct.2009 All Regions Workshop #2

5-7 Oct.2009 All Regions Workshop #2

Basic Design

5-7 Oct.2009 All Regions Workshop #2

GEOSTART deployment

NEAREST Abyssal Station25 August 200722h 14 min TUC3207 m, 150 km SW CSV

Cooperation with NEAMTWS

Seismic criteria for ATLANTIC Advisories

Information BulletinNo tsunami potential= 5.5All Locations= 100 km

Information BulletinNo tsunami potential5.5Inland(> 30 km)

Ocean-wide Tsunami Warning

Potential for a destructive ocean-wide tsunami > 1000 km

> 7.9

Regional Tsunami WarningOcean-wide Tsunami Watch

Potential for a destructive regional tsunami < 1000 km

7.5 to 7.9

Regional Tsunami Watch

Potential for a regional tsunami < 1000 km

7.0 to 7.5

Information BulletinSmall potential for a destructive local tsunami

5.5 to 7.0Under or very near the sea(< 30 km)

< 100 km

Bulletin TypeTsunami Potential(Mw)LocationDepth

Information BulletinNo tsunami potential= 5.5All Locations= 100 km

Information BulletinNo tsunami potential5.5Inland(> 30 km)

Ocean-wide Tsunami Warning

Potential for a destructive ocean-wide tsunami > 1000 km

> 7.9

Regional Tsunami WarningOcean-wide Tsunami Watch

Potential for a destructive regional tsunami < 1000 km

7.5 to 7.9

Regional Tsunami Watch

Potential for a regional tsunami < 1000 km

7.0 to 7.5

Information BulletinSmall potential for a destructive local tsunami

5.5 to 7.0Under or very near the sea(< 30 km)

< 100 km

Bulletin TypeTsunami Potential(Mw)LocationDepth

All Regions Workshop #25-7 Oct.2009

5-7 Oct.2009 All Regions Workshop #2

Next steps and After the DM• Final design of the Node Observatory;• Re-deployment of the existing

infrastructure on the forthcoming years;• Cabled observatory after 2012?• Cooperation with ARGO / EPOS

5-7 Oct.2009 All Regions Workshop #2

Outreach initiatives

• Within ESONET outreach initiatives focus will be made on the Lisbon Aquarium.

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Acknowledgements• GEOSTAR team, for providing basic

observatory hardware;• All Portuguese and Spanish teams

involved in the operation;• Esonet NoE members thank the EC for

the FP6 contract # 36851 signed in Mar. 2007, as part of the EC Global Change and Ecosystems priority;

5-7 Oct.2009 All Regions Workshop #2

THANKS !