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. DODS server Met data wind, air temp… ADCP current ADCP waves Water quality temp, salinity… System overview with respect to DODS/OPeNDAP Camera images internet Matlab command line GUI Observing system web site, portal Models Data analysis OPeNDAP Data Connector Direct URL entry into browser 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

15. 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

16. Initial problems when processing with default parameters

17. Sensitivity to processing parameters—further work underway

18. 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

19. 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

20. Working with vendor, refine post-collection processing

22. 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.

23. VIMS humans RDI ftp, email, phone

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

25. 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