LDEO IIC 2010-11
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Transcript of LDEO IIC 2010-11
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LDEO IIC 2010-11
• Summary of year’s activities– Forsyth/Wiens Recoveries– Cascadia Construction and TRM Deployment (testing)– Staffing
• Upcoming plans/schedule– Cascadia deep deployment (2011)– Mariana deployment (2012)– Chile deployment (2012)– Cascadia recoveries/turnaround (2012)
• Development– Completed/ongoing projects– Future projects
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Forsyth Recoveries (S of Shatsky)
Site Depth, m Acoustics Release Data
14 6002 Good No release
12 5788 Good 1 wt dropped after ~2h 244/370
9 5933 Good 1 wt dropped after ~2h 150/370
8 6007 Good Normal release 372/372
5 5994 None
2 5752 None
Faulty burnwires: Sites 9, 12, 14?
Sites 2, 5: implosion or early release ?
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Wiens Lau Recoveries
• 21 of 22 recovered• 13 had OBMs
• OK performance,• Some bad channels
• Depth restriction 5000 m• No low-pressure leaks
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Inventories (instruments and people)
• ~29 standard OBS (5 TCs; 24 L4s)• 30 (20 TRM; 10 standard) in Cascadia fleet (considerable overlap in design)
• People: 3 core, 5 peak– Engineer Gassier– Engineer Koczynski– Technician Oletu– Technicians Stolzmann, Brusa
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Cascadia Construction/Deployment
2 test cruises in LI Sound (battery issues; instrument survived 3’ drop)Corrosion test in LI sound
Made decision early 2011 to add popup buoys
Construction:
Possible TRM delays became apparent ~ April/May
Steel supplier/coater overwhelmed (19 tons in 900 pcs)
Estimated 5+ instruments ready for deployment cruise
10 standard Cascadia OBSs on track for October 2011
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New standard OBS
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TRM OBS
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Cascadia Deployment
15 delivered for cruise
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TRM Deployment Cruise July, 2011
15 deployed9 with popups
Heave challenges
1 TRM fell
1 tilted
1 recovered
Some had temperaturesensors
Major fishing collaboration
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TRM Recovery
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2011-12 Activities
• Cascadia Standard deployment, October 2011• Mariana experiment (Wiens) Jan/Feb 2011
– 10 standard OBSs– 5 moored instruments– Temperature sensors ?
• Chile experiment (Trehu) April/May 2011– 10 standard OBSs– Flowmeters
• Cascadia Recoveries/Turnaround [All summer…]
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Completed Development
• Switched to Trillium Compact leveling system in Al tube
• TRMs developed and built• OBS dataloggers redesigned: batteries separated• APG dataloggers incorporated into OBSs• TRM deployment/recovery approaches
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2011-12 Development Directions
• New FPGA for APG logger• Atomic clocks• TRM tweaks• Mariana moored instruments• Adding SIO flowmeters to standard OBSs • Incorporate broadband sensor• New OBS datalogger• Deep OBS
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Issues
• Confidence has increased (5 years)• But… recognize need to consolidate.
• Last year, working flat-out. May be false economy given per-instrument and data costs.
• Data: Backlog is critical problem. First Forsyth
experiment site to DMC yesterday.