Detailed workshop program

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• 1. Fundamental Turbulence Theory

  • define turbulence
  • identify the Navier-Stokes equation
  • apply the Reynolds decomposition to the Navier Stokes equation to derive mean and second order properties of turbulent flow

• 2. Ocean Turbulence Theory

  • apply dimensional analysis to derive length scales, such as Buoyancy frequency, Ozmidov scale, Komogrov scale, and Batchelor scale
  • reduce the viscous dissipation of turbulent kinetic energy to a single term under isotropic conditions
  • describe the Osborn and the Osborne & Cox models
  • state the Taylor Frozen Field hypothesis
  • identify, define, and describe the 1D velocity spectra, the shear spectra, and the Nasmyth spectra

• 3. Introduction to the VMP-250

  • explain the basic mechanics of a vertical profiler
  • locate and identify sensors, probes, and axes of orientation
  • install and remove probes
  • confirm proper orientation of the shear probes
  • safely disassemble and assemble the VMP-250
  • differentiate between a piston seal and a face seal
  • locate and identify the boards and understand their function
  • describe the flow of information and analog signal processing that occurs in the VMP

• 4. Data Acquisition Software (ODAS5IR)

  • establish a serial console connection between the computer and the VMP; describe the file structure of the data logger
  • run the ‘calibrate all’ function and interpret the results
  • set up RSILink for data file transfer
  • transfer files to and from the data logger using a USB connection; interpret and edit a configuration file (setup.cfg)
  • differentiate between the [root], [matrix], [vehicle_info] *new, and [channel] sections of the configuration file
  • identify which calibration para-meters are board-specific and which ones are probe-specific
  • describe the data file format
  • interpret the log file

• 5. Pre-deployment Checks

  • perform a bench test with dummy probes, process and interpret the data
  • identify every sealing surface on the instrument and confirm their integrity

• 6. Ocean Turbulence Measurement Techniques

  • identify key limitation of measuring fluxes in most regions of the ocean
  • explain why the velocity field is measured into the dissipation range
  • calculate the noise level required for deep ocean measurements
  • classify different operating environments, their average dissipation, and the corresponding length scale of eddies
  • recognize implicit and explicit profiling requirements

• 7. Ocean Turbulence Measurement Sensors

  • describe the shear probe calibration technique
  • identify the components of an FP07 thermistor
  • compare the sensor limitation of the shear probe and the FP07 thermistor
  • describe the SBE7 Micro Conductivity sensor

• 8. VMP-250 Deployment

  • perform pre-deployment checks (Unit 5) at sea
  • deploy and recover the VMP-250
  • Recognize successful data recording and interpret log file
  • identify data contamination from mechanical sources, if present

• 9. VMP-250 Maintenance

  • disassemble the VMP into its components
  • determine if an O-ring needs to be replaced
  • recognize corrosion and moisture damage
  • perform routine post-cruise and annual maintenance
  • reassemble the VMP and all of its components

• 10. Data Conversion and Processing

  • extract, edit, and patch a configuration file string into an existing data file
  • convert .p data file into physical units and save as a .mat file
  • extract “profiles” from a data file
  • assess kinematic quality of profiles and deployment
  • identify mechanical contamination of data files
  • identify turbulent regions form shear, temperature, and conductivity traces
  • modify key parameters in data processing including, but not limited to: fft length, overlap, and dissipation length
  • calculate shear spectra
  • calculate rate of TKE dissipation