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A Method for Obtaining the Depth of Ocean Mixed Layer Based on Mode Matching of Sound Velocity Perturbation

An acquisition method and mixed layer technology, which can be used in open-air water source surveys, instruments, complex mathematical operations, etc., can solve the problems of lack of mixed layer thickness information, missing information, lack of information, etc., achieving good timeliness, ensuring calculation accuracy, and low requirements Effect

Active Publication Date: 2022-02-22
GUANGDONG OCEAN UNIVERSITY
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Problems solved by technology

For the extrapolation of the upper ocean layer, the thickness of the mixed layer has strong temporal and spatial variation characteristics, and the lack of thickness of the mixed layer cannot be accurately extrapolated to the sea surface
To sum up, in the process of continuous fixed-point observation using the temperature chain method, there is often a lack of information on the thickness of the mixed layer, resulting in the lack of information for various applications
At present, there is no more accurate method for obtaining the thickness of the mixed layer, and it is urgent to develop a corresponding scheme to meet the needs of various marine research and applications in the continuous temperature chain observation data for the mixed layer information on the ocean surface

Method used

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  • A Method for Obtaining the Depth of Ocean Mixed Layer Based on Mode Matching of Sound Velocity Perturbation
  • A Method for Obtaining the Depth of Ocean Mixed Layer Based on Mode Matching of Sound Velocity Perturbation
  • A Method for Obtaining the Depth of Ocean Mixed Layer Based on Mode Matching of Sound Velocity Perturbation

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Embodiment

[0031] Embodiment: A method for acquiring the depth of the ocean mixed layer based on sound velocity perturbation mode matching, such as figure 1 As shown, according to the perspective of ocean dynamics, the mode of sound velocity disturbance is extracted, and the real disturbance mode is matched with the disturbance mode of the mixed layer with different thicknesses, and then the thickness of the mixed layer that the disturbance mode best matches is determined as the result, Specifically include the following steps:

[0032] S1. Intercept the sound velocity value X(hn,tn) of the temperature chain measurement sample that needs to judge the thickness of the mixed layer within a period of time, and use the following formula within the continuous time N:

[0033]

[0034] Get the average value of temperature chain measurement samples The matrix of temperature chain measurement samples is then subtracted from the average value of the temperature chain measurement samples Ob...

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Abstract

The invention discloses a method for acquiring the depth of the ocean mixed layer based on sound velocity disturbance mode matching, and relates to the technical field of acquisition of the depth of the ocean mixed layer. The real disturbance mode is matched with the disturbance mode of the mixed layer with different thicknesses, and then the thickness of the mixed layer with the best matching of the disturbance mode is determined as the result. By comparing the data characteristics of the sound velocity disturbance with the physical characteristics of the sound velocity disturbance in the case of ocean stratification, the method finally determines the ocean stratification and then obtains the depth value of the mixed layer, which has low requirements for measurement and can completely eliminate the need for temperature chain data. samples, thereby greatly expanding the application range of the method of the present invention, overcoming the problem of lack of complete section samples in practical applications, and obtaining the thickness of the mixed layer with high precision.

Description

technical field [0001] The invention relates to the technical field of ocean mixed layer depth acquisition, more specifically, it relates to an ocean mixed layer depth acquisition method based on sound velocity disturbance mode matching. Background technique [0002] The thickness of the mixed layer of the ocean is a basic physical quantity for studying the dynamic process of the upper ocean, the interaction between the air and the sea, and the ecological environment. The mastery of the thickness of the mixed layer is of great value for the research and application of the physics and biochemistry of the upper ocean. Taking the research and application of ocean acoustics as an example, the thickness of the mixed layer largely determines the thickness of the static pressure channel on the ocean surface, which in turn affects the characteristics of sound propagation in the upper ocean. The well-known "afternoon effect" can also be attributed to the result of the thickness varia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C13/00G06F17/16G06F17/10
CPCG01C13/00G06F17/16G06F17/10
Inventor 屈科
Owner GUANGDONG OCEAN UNIVERSITY
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