Ocean observation climate change and disaster warning the context
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Ocean Observation, Climate Change and Disaster Warning: the Context. David Meldrum Consultant, IOC/UNESCO, Paris [email protected] Contents of presentation. Is climate changing? Ocean observing systems already in place Weather and climate Disaster warning

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Ocean observation climate change and disaster warning the context

Ocean Observation, Climate Change and Disaster Warning: the Context

David Meldrum

Consultant, IOC/UNESCO, Paris

[email protected]


Contents of presentation

Contents of presentation

  • Is climate changing?

  • Ocean observing systems already in place

    • Weather and climate

    • Disaster warning

  • The challenges of the deep ocean

  • Opportunities for cable operators to make a difference


The evidence for climate change global temperatures

The evidence for climate change: global temperatures


The evidence for climate change global sea level

The evidence for climate change: global sea level


Sea level rise observed regional trends

Sea level rise: observed regional trends


Sea level rise population vulnerability

Sea level rise: population vulnerability


The evidence for climate change arctic sea ice extent

The evidence for climate change: Arctic sea ice extent


Timescales of climate variability and the ocean

Timescales of climate variability and the ocean


The evidence for climate change deep ocean temperatures

The evidence for climate change: deep ocean temperatures


Goos the global ocean observing system

GOOS: the Global Ocean Observing System


Examples of the instruments used

Examples of the instruments used


Moored instruments

Moored instruments


Challenges of the deep ocean compared to space

Challenges of the deep ocean (compared to space)

  • Satellites can’t see below the sea surface

  • Instruments have to withstand high pressure and corrosion

  • No energy source (e.g. solar panels)

  • Difficult for communications and imaging


But it s only skin deep

But it’s only skin deep!


Unusual deep seabed features

Unusual deep seabed features?


No they came from the red planet not the blue planet

No – they came from the red planet, not the blue planet!


Techniques for observing the deep ocean

Techniques for observing the deep ocean

  • Moorings

  • Landers

  • Lowered instruments

  • Acoustics

  • Cabled observatories

  • New oceanographers!


Disaster warning tsunamis

Disaster warning - tsunamis


Tsunami warning networks

Tsunami warning networks


Seismic activity

Seismic activity

Not all seismic activity causes tsunamis


Japanese tsunami predictions and observations

Japanese tsunami: predictions and observations

itic.ioc-unesco.org


Analysis centres generate warnings

Analysis centres generate warnings


Vandalism is a major problem

Vandalism is a major problem


Cables offer a solution

Cables offer a solution

  • Vandal-proof in the deep ocean

  • Instantaneous communications

  • Energy source

  • Next generation commercial repeaters to include built-in tsunami sensors?

  • Why not other sensors as well?

    • Ocean properties such as temperature and salinity

    • Seismometry

    • Passive acoustics


Passive acoustics has been used from cables before

Passive acoustics has been used from cables before

Blue whale migrations using SOSUS


Ocean acoustic pollution is a major issue

Ocean acoustic pollution is a major issue

IOC, Paris, Sept 2011


Conclusions

Conclusions

  • The deep ocean is poorly observed

  • Next generation cable repeaters could make a major impact

  • Important climate variables could be measured

  • Acoustic sensors would cast new light on marine mammals

  • Cables offer the ideal solution for tsunami warning

    • Vandal resistant

    • Instant communications

    • Energy available

    • Could be a business opportunity

    • Or why not just be green and eco-friendly and improve your image!

  • Suggestion: establish a small enthusiastic group to sketch out a limited pilot project


Cables are the future

Cables are the future!

Thank you!

TAT-1, Oban, Scotland


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