A Mixed Observation Method of Ocean Turbulence

Abstract

The invention discloses a mixed observation method of ocean turbulence, which comprises the following steps: (1) deploying an ocean turbulence observation system; (2) starting the ocean turbulence observation system, and performing state detection, positioning and setting observation tasks by a ground data center; (3) The ocean turbulence observation system dives, performing sawtooth dives, horizontal navigation, and sawtooth uplifts; (4) During the underwater movement of the ocean turbulence observation system, the turbulence observer observes the turbulence mixing distribution characteristics at different depths , and collect CTD data and flow velocity data synchronously through the CTD sensor and flow velocity sensor; (5) After the observation is completed, float up and transmit the collected data to the ground data center. The ocean turbulent mixing observation method of the present invention can simultaneously carry out horizontal observation and vertical section observation of turbulent mixing, realize horizontal and vertical space and time multi-dimensional synchronous observation of ocean turbulent mixing; and can realize independent intelligent observation of turbulent mixing under different ocean phenomena.

Description

technical field [0001] The invention relates to the field of ocean turbulence observation, in particular to a mixed observation method for ocean turbulence. Background technique [0002] Ocean turbulence is a highly complex three-dimensional unsteady, irregular flow with rotation, which is random, dissipative, and three-dimensional vector. Ocean turbulent mixing is the main way for the large-scale and mesoscale motion energy to cascade and finally dissipate to the small-scale in the ocean. The existing turbulent mixing theories and experiments have shown that the spatial distribution of turbulent mixing is irregular, and varies with location, depth, There are drastic changes in seafloor roughness, etc., especially in the ocean boundary layer region. Therefore, an in-depth understanding of the spatial distribution characteristics of ocean turbulent mixing and the cascade of energy at different scales is an important basis for improving ocean cognition. [0003] At present, ...

AI Technical Summary

Problems solved by technology

Among them, the horizontal observation method can only obtain the velocity fluctuation of ocean turbulence mixed at a specific depth, and lacks the high-resolution expansion of vertical space; in addition, the horizontal observation method has a large structure, is difficult to deploy and recover, is expensive, and lacks mobility , the observed turbulence data are easily affected by the low-frequency vibration caused by the undulating motion of the sea surface of the towed mother ship and the broadband high-frequency vibration generated by the cable

The free-fall vertical profile observation method can only obtain the velocity fluctuation and vertical distribution characteristics of ocean turbulence mixed on a single vertical path, lacking horizontal space expansion and time-space evolution data, and the vertical profile observation system is deployed by the mother ship, which is affected by sea conditions. , The influence of personnel operation is large, the degree of autonomy is low, the mobility is lacking, and the operation efficiency is low

Neither of the existing two observation methods can achieve simultaneous stereoscopic observation of ocean turbulence mixing in the vertical and horizontal directions, as well as long-term continuous and large-scale autonomous observation.

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