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ADCP-Based Determination of Directional Wave Spectra in the York River Estuary

ADCP-Based Determination of Directional Wave Spectra in the York River Estuary. John Brubaker, Lorraine Brasseur Carl Friedrichs, Todd Nelson, Don Wright. QARTOD II, February 28 – March 2, 2005. Outline. VIMS Observing system overview The context in which wave data will be provided.

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ADCP-Based Determination of Directional Wave Spectra in the York River Estuary

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  1. ADCP-Based Determination of Directional Wave Spectra in the York River Estuary John Brubaker, Lorraine Brasseur Carl Friedrichs, Todd Nelson, Don Wright QARTOD II, February 28 – March 2, 2005

  2. Outline • VIMS Observing system overview • The context in which wave data will be provided. • Use observing system to develop/test wave data sampling and QA/QC • Preliminary wave analyses • Hurricane Isabel deployment • ADCP/AWAC deployment • Addressing challenges of small-amplitude, short-period waves

  3. Global to Local Observing Programs • Global: GOOS=Global Ocean Observing System • National: IOOS=Integrated Ocean O S • Regional: MACOORA=Mid-Atlantic Coastal Ocean Observing Regional Association • Sub-regional: CBOS=Chesapeake Bay O S • Local: VIMS Observing System • Local: U. Md. • Local: ODU • Local: more!

  4. Blue = proposed

  5. platforms • power • communications • sensors/cameras • control/coordination

  6. System overview with respect to DODS/OPeNDAP • Met data • wind, air temp… • ADCP current • ADCP waves • Water quality • temp, salinity… Models Data analysis DODS server • Camera images internet Direct URL entry into browser Observing system web site, portal OPeNDAP Data Connector • Matlab • command line • GUI Note: some data is internet accessible with and without DODS.

  7. Outline • VIMS Observing system overview • The context in which wave data will be provided. • Use observing system to develop/test wave data sampling and QA/QC • Preliminary wave analyses • Hurricane Isabel deployment • ADCP/AWAC deployment • Addressing challenges of small-amplitude, short-period waves

  8. Outline • VIMS Observing system overview • The context in which wave data will be provided. • Use observing system to develop/test wave data sampling and QA/QC • Preliminary wave analyses • Hurricane Isabel deployment • ADCP/AWAC deployment • Addressing challenges of small-amplitude, short-period waves

  9. Initial problems when processing with default parameters

  10. Sensitivity to processing parameters—further work underway

  11. Transition • Phase I: Emerging observing system • Waves on back burner • 600 kHz ADCP • Opportunistic deployments • Results promising, interesting, need work • Phase II: Obs sys infrastructure in place • 1200 kHz ADCP (also plan to acquire AWAC) • Systematic trials for wave data • Need to identify basic QA/QC acceptance criteria

  12. Outline • VIMS Observing system overview • The context in which wave data will be provided. • Use observing system to develop/test wave data sampling and QA/QC • Preliminary wave analyses • Hurricane Isabel deployment • ADCP/AWAC deployment • Addressing challenges of small-amplitude, short-period waves

  13. Working with vendor, refine post-collection processing

  14. Exploit observing system as development environment • Rapid, efficient trials with different (existing) command configurations. • In situ development of new data acquisition modes. • Independent wave information, initially from images.

  15. ftp, email, phone RDI VIMS humans

  16. Cameras are mounted on buoy and on pier piling.

  17. Conclusions • In estuaries, wave data from acoustic profilers is highly desirable • Relatively secure on bottom • Along with waves, get currents, backscatter profile, turbulence, water level • State of the art inadequate for specification of QA/QC criteria • Outlook is promising • Observing system infrastructure can facilitate progress

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