ADCP-Based Determination of Directional Wave Spectra in the York River Estuary
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Transcript of ADCP-Based Determination of Directional Wave Spectra in the York River Estuary
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ADCP-Based Determination of Directional Wave Spectra in the
York River Estuary
John Brubaker, Lorraine BrasseurCarl Friedrichs, Todd Nelson, Don Wright
QARTOD II, February 28 – March 2, 2005
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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
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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!
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Blue = proposed
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• platforms• power• communications• sensors/cameras• control/coordination
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DODS server
• Met data wind, air temp…• ADCP current• ADCP waves• Water quality temp, salinity…
System overview with respect to DODS/OPeNDAP
• Camera imagesinternet
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.
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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
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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
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Initial problems when processing with default parameters
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Sensitivity to processing parameters—further work underway
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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
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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
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Working with vendor, refine post-collection processing
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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.
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VIMS humans RDIftp, email, phone
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Cameras are mounted on buoyand on pier piling.
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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