Slide 1

LDEO IIC 2010-11 Summary of years 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 Slide 2 Forsyth Recoveries (S of Shatsky) SiteDepth, mAcousticsReleaseData 146002GoodNo release 125788Good1 wt dropped after ~2h244/370 95933Good1 wt dropped after ~2h150/370 86007GoodNormal release372/372 55994None 25752None Faulty burnwires: Sites 9, 12, 14? Sites 2, 5: implosion or early release ? Slide 3 Wiens Lau Recoveries 21 of 22 recovered 13 had OBMs OK performance, Some bad channels Depth restriction 5000 m No low-pressure leaks Slide 4 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 Slide 5 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 Slide 6 New standard OBS Slide 7 TRM OBS Slide 8 Cascadia Deployment 15 delivered for cruise Slide 9 TRM Deployment Cruise July, 2011 15 deployed 9 with popups Heave challenges 1 TRM fell 1 tilted 1 recovered Some had temperature sensors Major fishing collaboration Slide 10 TRM Recovery Slide 11 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] Slide 12 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 Slide 13 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 Slide 14 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.