Acoustic Doppler Current Profiler

Acoustic Doppler Current Profilers (ADCP) provide a 3D water-current velocity for a small volume of the overlying water column by making very high-frequency acoustic (75 kHz to 600 kHz) Doppler shift measurements. An instrument with a particular frequency is most suitable for a given environment, hence, there are multiple types of instruments on the Cabled Array based on water depth of deployment.

Upward Looking ADCPs on the Cabled Array include:

  • Teledyne RDI – WorkHorse LongRanger Monitor 75 khz; this instrument is installed to monitor plumes of methane bubbles issuing from seeps at Southern Hydrate Ridge
  • Teledyne RDI – Workhorse Quartermaster Monitor 75 kHz instrument installed as part of the Oregon Offshore Benthic Experiment Package
  • Teledyne RDI – Workhorse Quartermaster Monitor 150 kHz instruments installed at the Slope Base and Axial Base seafloor sites
  • Teledyne RDI – Workhorse Quartermaster Monitor 300 kHz instrument installed at the Oregon Shelf seafloor site as part of the Benthic Experiment Platform, and
  • Teledyne RDI custom 5-Beam Vertical beam (600 kHz) VADCPs installed on the Platform Interface Assemblies at 200 meters depth on the Shallow Profiler Moorings at the Slope Base and Axial Base sites

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