Multi-purpose information-measuring system for vertical profiling of the ocean environment

L.A. Krasnodubets1,2

 1Sevastopol State University, RF, Sevastopol, Universitetskaya St., 33

2Institute of Natural and Technical Systems, RF, Sevastopol, Lenin St., 28

Email: lakrasno@gmail.com

DOI: 10.33075/2220-5861-2021-1-54-60

UDC 621.384 – 027.31

Abstract:

   On the basis of a mathematical description of the processes of measuring the vertical profile of the density of the oceanic environment using a diving offshore autonomous probe – a profiler equipped with an onboard navigation system, a structure and a computer model of a multipurpose information-measuring system is proposed, which is intended for use in operational oceanology. The proposed system forms arrays of measurements of vertical profiles in situ of the density of seawater and its increment, as well as the speed of sound as functions of hydrostatic pressure, obtained during one sounding. At the same time, arrays of complete and thermohaline vertical stability of water layers, as well as the corresponding vertical distributions of the Väisälä-Brunt frequency of thermohaline oscillations in the stratified ocean environment, are formed almost in parallel. In the course of the simulation, an original model of the immersion of an autonomous marine probe in stratified sea water was used, as well as a dynamic model for measuring the trajectory parameters of its movement, taking into account the inertial properties of the acceleration and pressure sensors used. As an object of measurements, we used a simulation model of the ocean environment with vertical density stratification and the corresponding speed of sound in seawater, developed on the basis of real data of profile measurements obtained from specific hydrological stations. The verification of the models of the dynamic measurement processes was carried out by the method of computer simulation in the MATLAB & Simulink environment based on the comparison between the simulation results and available results from the hydrological stations. The illustrations of the results of computer simulation are presented.

Keywords: profiler, ocean stratification, computer model, seawater density, dynamic measurements, Väisälä-Brunt frequency, vertical stability.

To quote: Krasnodubets, L.A. “Multi-Purpose Information-Measuring System for Vertical Profiling of the Ocean Environment.” Monitoring Systems of Environment no. 1 (March 25, 2021): 54–60. doi:10.33075/2220-5861-2021-1-54-60.

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