The fixed-point ocean turbulence observation based on submerged buoy

A comparison experiment was taken in kiaochow bay between a new designed fixed-point FMS-OUC turbulence observing instrument and MSS60 microstructure profiler made by Sea & Sun. It makes a same time and space condition for measuring. In this paper, the conclusion gives a good similarity in 0.93 about the two groups of shear data in dissipation rating. And the narrower distribution interval proves that the new instrument is good at accuracy and high precise. In this paper, a submerged buoy system is designed for turbulence observation, which is embedded in a streamline-shape floating body that is made of buoyancy material of glass microsphere, and the floating body is connected to the submerged buoy system. Accelerate sensors are used for the vibration measurement in the instrument together with the shear probe sensor. Both the vibration data and the shear data are acquired by the instrument at the same time, so as to remove the impact on ocean turbulence. The processing of the data acquired by FMS-OUC is base on the cross-spectrum analysis method, the dissipation rating after dispose of vibration signal matches the Nasmyth spectrum well.