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Bruce M. Howe School of Ocean and Earth Science and Technology
University of Hawai’i at Manoa
DESSC MeetingSan Francisco
14 December 2014
University of Hawaii DeSSC Report• HURL• ACO• ROV Lu’ukai• Green cable systems
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Hawaii Undersea Research Laboratory - HURL
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Pisces IV & Pisces VCompleted a highly successful 20 dive program in November 2014
Future dive programs will be dependent on contract funding
Submersibles, support ship and crew are available for a range of projects beginning Spring 2015
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Makai Pierbeing developed as an ‘in-
water’ enclosed test facility
• Current focus is on general submersible maintenance
• Electronics test facility, machine shop, overhead bridge crane, moon pool
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Pisces submersibles offer a good training experience for future submersible operators. Training courses have been structured.
Two Pisces submersibles operating together on the bottom are ideal for film making as independent camera and lighting platforms.
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Recent TV Special for NHK on sunken Japanese aircraft-carrying subs
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Maritime Heritage Dives on Japanese Midget Submarine
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Bow of midget sub lit up by Pisces V
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Investigating the Deep Coral Reefs off Hawaii
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ALOHA Cabled Observatory
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Hawaii Ocean Time-series (HOT)25 years, 250 cruises, and continuingM. Church, R. Lukas, D. Karland many others
Station ALOHA
ALOHA Cabled ObservatoryJune 2011 – to facilitate science at ALOHA
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CAM2:Camera2 lightshydrophone
Camera
LightCTADCP
2 Hydrophones
BSP:CTDO2, ADCPModem, PressureFLNTU
ACO – 2 Nov 2014
Jason service dive
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Camera landed next to cable termination frame
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Aragonite – sea water electrodev
Saw hydrogen bubbles - electrolysis
MBARI Port Test Tool – Thanks!v
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Basic sensor package –cutting off buoyancy
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ACO Sponsors
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ACO web page
• Tabs for real time sensor data
• Also:– System history– Photo/audio
libraries– Dashboard –
engineering data
– FTP to data– How to connect
MBARI – SIAM+SSDS
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Daily averaged temperature at 4726 m
cold overflow eventslarge oscillations slow recovery
3.5 years now
5 m°C
30 m°C
Need:Continuous sampling!
1.5 year
HOT CTD
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ACO Status and next steps• Data flowing• NSF OTIC O&M project
– 2012-2015– Barebones– Must re-new 2015– November 2014 service
• More sensors, more working
• 2015+ service– use UH ROV Lu'ukai– Add second basic
sensor package• CTDO2, Fluorometer,
pressure– Refurb secondary node
and deploy• New projects
– RAP tomography ONR✓– Noise interferometry –
Feb - NSF– Deep sea biology and
carbon cycle J. Drazenand K. Smith - NSF?
– Mooring with profilers –2016 MRI - NSF?
• http://aloha.manoa.hawaii.edu
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UH ROV Lu’ukai - Sea Diver
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ROV Lu’ukai
• Acquired June 2013• At-sea testing started October 2013• Some dives as deep as 4700 m• Most recent dives 37-39, 4-6 December
2014, 432 m and 2600 m• Next 6 months, work to operational status• ACO (4728 m)• Others
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Sediment sampling
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Picking up a cup – 432 m
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Connector test frame
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Adjusting weights on package
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ODI Connector practice – 432 m
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2600 m
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For Future Consideration:Green cable systems
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For Future Consideration:Green cable systems
• Add sensors and instrumentation to commercial submarine telecommunications cable systems
• Hazard warning and mitigation – tsunami and earthquake
• Climate change and ocean observing
• Would need deep submergence capability
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Green cable systems• International Telecommunications Union• UN agency of member states, industry, academia• With WMO, IOC – Joint Task Force (JTF)• Add ocean sensors to submarine cable
telecommunications systems– Hazard mitigation (tsunami and seismic)– Climate change– Initial: temperature, pressure, acceleration– Future: acoustic modem/IES/hydrophone, chem/bio,
nodes…• Governments buy share of system (buy comms
redundancy/expansion/resiliency as well)• Slowly build up global coverage over 25 year life cycle
(last longer)
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“Green” submarine telecom cable systems • Current cables – 10-25
year cycle• New ones always going in
– take advantage! Arctic - planning
Acoustic Tomography
www.itu.int/en/ITU-T/climatechange/task-force-sc
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Thank you
Questions