DESIGN & IMPLEMENATION WORKSHOP. Conceptual Network Design For The Regional Cabled Observatory

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1 DESIGN & IMPLEMENATION WORKSHOP Conceptual Network Design For The Regional Cabled Observatory

2 50 N N4 N10 N11 N7 N8 N5 N9 N6 AN INTEGRATED RCO Maintain Integrity of a Plate-Scale Experiment & Future Expandability Optimize Early Return by Rapid Augmentation of Stage N N2 N1 N3 130 W 125 W

3 Potential for Integrating Climate, Biogeochemical and Marine Ecosystem Processes at Global to Coastal Scales Subarctic Current Alaska Gyre Alaska Current West Wind Drift Southern California Bight Central Pacific Gyre California Current

4 50 N ORION-RCO & West Coast N10 N11 N7 N8 N9 What linkages exist between carbon fluxes and climate forcing in adjacent coastal and regional regimes? West Wind Drift N5 N6 warm phase cool phase N4 45 N N2 N1 N3 California PDO &ENSO Coastal recommends surface moorings Ocean Biogeochemical, Climate Moorings 130 W 125 W

5 SEISMICITY & DEFORMATION A Plate-Scale Observatory For Seismology & Geodynamics of the Pacific Northwest Earthquakes, Physics, & Fault Mechanics Observatory on the Blanco Transform Fault Seismic and Geodetic Observations Along the Cascadia Continental Margin A Cabled Observatory on the Juan de Fuca Ridge Seismometers

6 Transformational Science with the Integrated OOI Subarctic Current West Wind Drift Alaska Gyre Alaska Current Tectonic plates are the fundamental building block of our planet. Central Pacific Gyre What are the interrelated processes that California control the formation, evolution and destruction of plates Currentand their interaction with the continents?

7 Papa

8 RCO and Earthscope Plate Boundary Observatory What is the structure and interaction between plate subduction and the over-riding continent? NA Plate

9 Crustal Strain, Hydrogeology, and the Biosphere Highest Density of ODP Holes thermistors, pressure sensors, ± seismometer packer ODP-IODP Corks microbial-fluid samplers

10 Plate-Scale Response to Seismic Events: Largest Fractured Aquifer 857D Davis et al., 2001 JGR Events/hr Pressure (kpa) Pressure transients ODP Observatories D Earthquakes from SOSUS M = Time (Days)

11 A. Fisher & N. Rager ORION RCO What is the magnitude and variability of plate-tectonically forced fluxes from the ocean crust into the overlying ocean? Hydrothermal Breathing Holes Ridge flanks account for 70-80% of the heat flux Chemical fluxes may be significant Ridge flanks 1-65 Ma make up 70% of ocean basins Potentially enormous habitable volume on a global scale Driving hypothesis: Where there is fluid circulation, there is microbial activity

12 METHANE HYDRATES Global Carbon Cycle, Biosphere, Climate Change, Hazards A Northeast Pacific Hydrate Observatory System (NEPHOS) at South Hydrate Ridge 1250 m Borehole Observations for Sustained Time-Series Observations: Hydrogeology, Geobiology, Plate-Scale Strain

13 Earths Carbon Reserves: Importance of methane hydrates Depth (m) BSR dissolved organic matter m terrestrial biosphere 830 Hydrate Ridge Leg 204 soils 1,400 detritial org. peat carbon fossil fuels (coal, oil, natural gas) 5,000 atmosphere3.6 marine biosphere gas hydrate (marine & terrestrial) 10,000 quantities in gigatons of carbon

14 Linkages Between Crustal Formation and Life

15 50 N 45 N N10 N11 N7 N8 N5 N4 N2 N3 N9 N6 N1 Priorities Maintain Integrity of a Plate-Scale Experiment & Future Expandability Node design optimizes largest component of interdisciplinary science Ideally include Gorda connection (strong water column and geophysical drivers), and Cleft (geophysical-hydrothermal) MARS is the test bed for Stage W 125 W Optimize early return by rapid augmentation of Stage 1. ~ 4X cheaper

16 DESIGN & IMPLEMENATION WORKSHOP Over All Recommendations Con t: Early mapping is critical for site characterization and route planning Engineering evaluate cost/reliability for connection of Stage 1 and 2 Prioritization of backbone cable, branching units, and primary nodes, secondary infrastructure Need for real estate management (cables, acoustic interaction etc) MARS and Stage 2 must be interoperable; goal for similar compatibility with Stage 1

17 DESIGN & IMPLEMENATION WORKSHOP ORION office establish mechanism for community interaction via the internet, updates, lists Maintain integrity of full plate scale experiment Investigate accommodation of cable route to southeast toward Gorda Plate Ridge community needs to evaluate Cleft site/phasing Core instrumentation for profiler moorings? - more mooring with no instruments and fewer moorings with core suite of instrumentation Establish close coordination with Coastal Group Engineering and CI needs to define interfaces and dependences between CI and the RCO