1. PRIMARY FLOW FEATURES 1Lopez Pass open boundary: Peak daily tidal flow >1 m/s. Highly turbulent and well mixed. Detailed measurements will be harmonically analyzed at each tidal component so conditions can be predicted from continuous tide gage data. 2Lopez Sound open boundary: Flows expected to be small. Similar measurement and prediction program to Lopez Pass. 3Lopez Pass into body of Hunter Bay: Highly turbulent area with strong surface features and possibly generation of internal waves. Primary signal is position of tidal front. 1Rim, Ram and Rum Island channels: Three similar but different width channels driven by the same Lopez Pass currents. Each drops from the Lopez Pass plateau into deeper water with varying steepness. Expect non-hydrostatic conditions. 5 Mud bay: a shallow bay with drying flats. Expect maximum affect of surface fluxes in this area. Lopez Island Study Area (LISA) Washington – BC AreaSan Juan Islands Lopez Island 1 2 3 4 5 FACILITIES and SENSORS HUBB: HUnter Bay Base (lab, dock, shop, TG). All data will be input to HUBB via a LISA wide wireless intranet. All sensor data and model results will be archived and posted on the LISA web site. “RV TRACER”: 22’ SeaSport (ADCP, CTD, ES) TG: Tide Gage ES: Environmental Suite (wind, air, etc.) BA: Bottom Mounted (movable) ADCPs FC: Fixed Cameras MB: Moored Buoy (ADCP, CTD, ES) DB: Dynamically Positioned Buoy (ADCP, CTD, ES) WB: Wireless Intranet Bridge HUBB SPERRY PENINSULA LOPEZ SOUND MUD BAY HUNTER BAY BASIC FLOW AND ADCP TRACK SURFACE FEATURES FROM FC1 CENTER I DECATUER I ADCP TRANSECT CROSS TRACK ALONG TRACK VERTICAL ROMS SIMULATION LOPEZ PASS ILLUSTRATIVE SAMPLES FOR FLOOD CONDITIONS ( NOT TAKEN AT THE SAME TIME OR BASED ON SAME FORCING) SPERRY PENINSULA Lopez Island is part of the San Juan Archipelago, at the eastern end of the Strait of Juan de Fuca, between Washington State and British Colombia. LISA is an area on the east side of Lopez Island, approximately 5X8 km, with several bays, small islands and channels. There is an energetic tidal forcing through Lopez Pass where currents exceed 1 m/s on a daily basis. Within LISA, there are distinct sites with repeatable conditions of interest including high turbulence, dissipation and mixing, non-hydrostatic flow, internal wave generation, flow separation, wetting and drying and significant tidal depth variations. Over the next several years, we intend to develop a comprehensive, long- term monitoring system for the physical oceanography at LISA using ADCPs, CTDs, tide gages and stereographic cameras. We will also implement one or more detailed numerical models, beginning with ROMS, and including data assimilation from the sensor suite. Our primary research interest is the understanding and modeling of stratified flow over topography. However, LISA will also be available for biological and other research that can benefit from a detailed knowledge of the physical environment. We expect that the new tangent linear and adjoint features of ROMS 3 will play an important role in this work, for example in sensitivity analysis and data assimilation. PHASE I MOORED BUOY ADCP, CTD, ENVIRONMENTAL, GPS catamaran hull, conventional mooring PHASE II DP BUOY ADCP, CTD, Environmental, GPS Disk hull, Dynamic Positioning by drift, thrusters and mooring RV “TRACER” ADCP, CTD, ENVIRONMENTAL, GPS 22’ SeaSport, 25 knots 1km 1 2 3 4 4 5 TG ES HUBB WB BA FC MB WB DB MB MOBILE PLATFORMS DB TG HUBB 50 25 8 30 7 20 4 1 2 TG 1 FC Mid-depth currents: blue to west, red to east (Depths in Meters) Juan de Fuca Victoria Washington Vancouver Is. Seattle Lopez Island Wayne Martin UW wmartin@ocean.washington.edu 400 x 650 Gridded Bathymetry (~10 m grid) Lopez Island

2. Polypropylene Hull with Batteries and Thrusters LISA AUTONOMOUS SURFACE VEHICLE Vertical Profiling Sensor Package And Anchor Light, Flag, Antenna, GPS and Sensors Bumpers Payload Container, Winch and ADCP

4. Tidal Height - ft Current Speed in Lopez Pass – m/s FORCING THIS WEEK WINCH: Precise up/down control, no slip rings, any size cable

5. BAT INSTRUMENT BOX: Laptop, Watch Dog Timer, 8 Port USB/RS232, Weather I/F, RF Modem, Control I/O ADCP: Current Velocities, Back Scatter, Heading, Pitch, Roll Catamaran Hulls (Old Hobicat) WINCH: Precise up/down control, no slip rings, any size cable Profiling CDT and other Instruments Meteorological Sensors, Light, and Antenna LISA Prototype Profiling Buoy 4 Point Mooring Estimated Cost w/o Sensors: $5000 with Baseline Sensors: $20000