ADCP (Acoustic Doppler Current Profiler) instruments use sound scattered by particles in the water, combined with the Doppler effect, to measure the speed of the water. By using acoustics in this way, it is possible to obtain near-instant profiles of water velocity at multiple depths in the water. It is also possible to use the acoustic scattering intensites recorded by the instrument to estimate abundances of material or organisms of certain size ranges.
OceanLab has several ADCPs (click here for equipment overview). At the Munkholmen site, the ADCP is installed (downward-facing) in one of the moonpools at approximately 2m depth. At the Ingdalen site, the ADCP is installed (downward-facing) on the side of the buoy at approximately 1.5m depth. The Nortek Signature-100 5 beam instruments that are deployed on the OceanLab buoys, have an additional acoustic beam that allows for more information on oganism abundances than common 4-beam ADCPs.
Instrument locations and types
|Munkholmen||ADCP moonpool (ca. 2m depth)||Nortek Signature-100 5 beam||Environmental Data: Munkholmen|
|Ingdalen||ADCP bracket (ca. 1.5m depth)||Nortek Signature-100 5 beam||Environmental Data: Ingdalen|
|SINTEF SeaLab||Mobile profiling frame (for boatwork)||Nortek Signature-100 5 beam + GPS, IMU and logging unit||n/a|
|SINTEF SeaLab||Available for fieldwork||Nortek Continental 190kHz||n/a|
|SINTEF SeaLab||Available for fieldwork||Aanderaa RDCP 600||n/a|
|SINTEF SeaLab||Available for fieldwork||Teledyne RDI ADCP Long Ranger||n/a|
External links Acoustic Doppler current profiler
Munkholmen ADCP during cleaning.
Ingdalen ADCP before deployment.