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Method and system for effectively correcting propagation delay of oversea tsunami

A propagation delay and tsunami technology, which is applied in special data processing applications, design optimization/simulation, etc., can solve problems such as systematic deviation in prediction of arrival time of transoceanic tsunami, inaccurate prediction results, etc., to improve computing efficiency and correct delay The effect of error and accuracy improvement

Pending Publication Date: 2022-03-25
国家海洋环境预报中心
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Problems solved by technology

[0004] To this end, the embodiments of the present invention provide a method and system for effectively correcting the propagation delay of a transoceanic tsunami to solve the problem of systematic deviation in the existing prediction of the arrival time of a transoceanic tsunami due to the propagation delay of a transoceanic tsunami. inaccurate question

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  • Method and system for effectively correcting propagation delay of oversea tsunami
  • Method and system for effectively correcting propagation delay of oversea tsunami
  • Method and system for effectively correcting propagation delay of oversea tsunami

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Embodiment 1

[0075] Such as figure 1 and figure 2 As shown, this embodiment proposes a method for effectively correcting the propagation delay of a transoceanic tsunami, which method includes:

[0076] S100. Integrating the superimposed influence of multiple physical effect factors on the tsunami phase velocity, deriving the wave dispersion relationship under the influence of each physical effect, obtaining the corresponding equivalent ocean depth, and constructing a tsunami propagation delay depth correction model combined with multiple physical effects.

[0077] In this embodiment, the physical effect factors include wave dispersion, earth elastic effect and seawater layering effect.

[0078] This embodiment creatively considers the second-order physical effects ignored by the shallow water equation, and derives a new type of wave dispersion relationship based on a new physical framework. Finally, the influence of wave dispersion, earth elasticity and seawater density stratification o...

Embodiment 2

[0140] Corresponding to Embodiment 1 above, this embodiment proposes a system for effectively correcting the propagation delay of a transoceanic tsunami, which includes:

[0141] The depth correction model building block is used to synthesize the superimposed influence of multiple physical effect factors on the tsunami phase velocity, and derive the wave dispersion relationship under the influence of each physical effect, obtain the corresponding equivalent ocean depth, and construct a tsunami with multiple physical effects Propagation delay depth correction model;

[0142] The tsunami propagation arrival time acquisition module is used to estimate the tsunami control period and obtain the wave number according to the period;

[0143] According to the joint multi-physics effect tsunami propagation delay depth correction model and the obtained wave number, the joint equivalent ocean depth of the whole region is obtained;

[0144] Input the obtained joint equivalent ocean depth...

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Abstract

The embodiment of the invention discloses a method and a system for effectively correcting propagation delay of an ocean-crossing tsunami, creatively considers a second-order physical effect ignored by a shallow water equation, deduces a novel wave dispersion relationship based on a new physical framework, and improves the propagation delay of the ocean-crossing tsunami. Finally, the influence of wave dispersion, earth elasticity, seawater density stratification and other effects on the tsunami phase velocity is simulated through a depth correction method, so that the arrival time error of the oversea tsunami is reduced. Compared with a classic shallow water equation, the method has the advantages that delay errors of the ocean crossing tsunami are effectively corrected, and the tsunami propagation arrival time errors can be increased by 60-80%. Compared with other methods, the calculation efficiency can be improved by dozens of times or more on the premise that the calculation precision of the result obtained through the method is equivalent. Therefore, the method is particularly suitable for upgrading the tsunami early warning system.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of marine disaster prevention and reduction and tsunami early warning, and in particular to a method and system for effectively correcting the propagation delay of transoceanic tsunami. Background technique [0002] A tsunami is composed of one or a series of long-period shallow water waves, which are mainly generated by submarine earthquakes, submarine or coastal landslides and other factors. Transoceanic tsunamis can carry huge energy and spread thousands of kilometers, causing casualties and losses to near-field and far-field coastal areas. Timely and accurate prediction of the arrival time of transoceanic tsunami and orderly evacuation of coastal residents are the most fundamental goals of the tsunami warning and disaster mitigation system. [0003] With the improvement of global tsunami monitoring capabilities, more and more observational data show that compared with the predictio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 王培涛孙立宁赵联大王宗辰
Owner 国家海洋环境预报中心
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