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Oceanic Remote Chemical/optical Analyzer (ORCA)

PRISM John Dunne; Wendi Ruef. ORCA overall; Steven Emerson; Allan Devol. Jan Newton; Rick Reynolds. General Support. T,S, O2 NO3, l. Oceanic Remote Chemical/optical Analyzer (ORCA) An autonomous profiler monitoring water quality in south Puget Sound. Nutrient Analyzer. ORCA GOALS.

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Oceanic Remote Chemical/optical Analyzer (ORCA)

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  1. PRISM John Dunne; Wendi Ruef ORCA overall; Steven Emerson; Allan Devol Jan Newton; Rick Reynolds General Support T,S, O2 NO3, l Oceanic Remote Chemical/optical Analyzer (ORCA) An autonomous profiler monitoring water quality in south Puget Sound Nutrient Analyzer

  2. ORCA GOALS • Develop a robust remote chemical and biological monitoring system • T, S, Light, Meteorology • NO3, O2, Chl-a, turbidity • NH4, Gas Exchange parameters • Telemeter data back to UW • Monitor the spectrum of time-scales • Hourly (tides), Daily (solar), Weekly (plankton growth), Monthly (blooms), Annual (seasons, and inter-annual, e.g., El Nino) • Describe natural variability and characterize and help evaluate potential human influence • Validate PRISM physical and biological models • Ground-truth satellite ocean color

  3. WHAT DOES ORCA LOOK LIKE? ORCA Schematic View light weather station radar reflector superstructure 4.2 m solar panel Platform and housing For Winch, electronics, etc solar panel Atlas float (cut away view) package ballast ring anchoring (break in scale)

  4. WHERE IS ORCA?

  5. Nutrients Photosynthesis (P) : [O2] CO2 + H2O + nutrients CH2O + O2 Stratification Respiration and Decay (R) : [O2] CH2O + O2 CO2 + H2O + nutrients Excess nutrients and stratification (eutrophication) can lead to consumption of all the oxygen in a system, so fish can no longer survive there

  6. http://www.ocean.washington.edu/research/orca/

  7. primary productivity (mg C m-3 d-1) 0 200 400 600 0 500 1000 0 500 1000 0 0 0 5 5 5 10 depth (m) 15 10 10 20 10 Jul 00 12 Oct 00 25 Sep 00 15 25 15 enhancement surface enhancement no enhancement July 12 - 28, 2000 Sept. 20- Oct. 2, 2000 October 15-21, 2000 Sigma-t Chl ug/l blue = ambient production red = spiked with NH4 and PO4 O2 mg/l enhancement no enhancement surface enhancement Effect of nutrient addition on phytoplankton productivity Carr Inlet, WA Ecology

  8. Goals for 2003 • Science Goals: • MIXED experiment (April 2003) • Nutrients; NO3 and NH4 • Move Orca for Brightwater • Publish Orca Results • Prism Goals: • Use Orca to Validate ABC-POM • Carr Inlet • Brighwater site • Outreach • Maintain Orca Website • Orca School

  9. Longer Term Goals • Science • Study Bloom Dynamics/gas exchange/nutirent/physics coupling • Mixed layer • Aphotic zone • Add Sensors (PO4, Eddy Correlation, micro-gradient) • Publish Orca Results • Expand Network: • South Sound, Main Basin, Hood Canal, Admiralty Inlet • Continue and Expand Outreach/Education

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