Method and system for calculating ocean, atmosphere and freshwater loading effects

A load effect and marine technology, applied in geophysical measurement, instruments, etc., can solve the problems of lack of load tide and ocean, atmosphere and freshwater load effects

Active Publication Date: 2018-03-30
THE FIRST INST OF OCEANOGRAPHY SOA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From an ocean perspective, there is a lack of calculation of loading tides and ocean, atmospheric and freshwater loading effects

Method used

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  • Method and system for calculating ocean, atmosphere and freshwater loading effects
  • Method and system for calculating ocean, atmosphere and freshwater loading effects
  • Method and system for calculating ocean, atmosphere and freshwater loading effects

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with drawings and embodiments.

[0029] like figure 1 As shown, the calculation method of ocean, atmosphere and fresh water load effect that preferred embodiment of the present invention provides comprises the following steps:

[0030] Step S1, using satellite altimeter to extract ocean tide information, and obtain an initial value of global ocean tide ζ according to the ocean tide information.

[0031] Specifically, the sea surface height measured by the satellite altimeter is the distance between the sea surface and the center of the earth, and its tidal component is called geocentric tide (denoted as ζ g ), which consists of the usual ocean tide ζ, solid earth body tide (bodytide, denoted as ζ b ) and the response of the solid earth to ocean tidal loads, that is, the vertical displacement loading tide (denoted as ζ l ) composed of, refer to figure 2 , which consists of: ζ g =ζ+ζ b +ζ 1 , if ...

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Abstract

The invention provides a calculation method and a calculation system of an ocean, atmosphere and fresh water load effect. The method comprises the following steps: step S1, extracting ocean tide information by utilizing a satellite altimeter, and obtaining an initial value of global ocean tide zeta according to the ocean tide information; step S2, acquiring change values of a sea surface height, a sea surface density, atmospheric pressure and fresh water storage amount, determining an elastic earth model according to the change values, and calculating a load tide zeta SAL; and step S3, acquiring a tide generating force according to the initial value of the zeta and the load tide zeta SAL, repeating the step S1 for multiple times to obtain zeta, and recalculating the zeta SAL according to the tide generating force until an accurate zeta SAL value is obtained.

Description

technical field [0001] The invention belongs to the field of marine monitoring, and in particular relates to a calculation method and system for ocean, atmosphere and freshwater load effects. Background technique [0002] In addition to being directly affected by the tidal force to cause vertical and horizontal displacements and changing the gravitational field, the solid earth is also subject to the action of ocean tidal loads to cause vertical and horizontal displacements and changing the gravitational field (Chen Zongyong, 1980; Xu Houze and Mao Weijian, 1988 ; Ray, 1998; Huang Zuke et al., 2005). Understanding and calculating this variation is critical to geodesy and satellite positioning. The main concern of geodetic work is the change of gravity field, displacement field, inclination field and strain field caused by loading effect. Ocean tidal work is mainly concerned with the vertical displacement of the surface caused by the loading effect and the self-attraction / l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V9/00
CPCG01V9/00
Inventor 徐晓庆魏泽勋王永刚李淑江范斌高秀敏
Owner THE FIRST INST OF OCEANOGRAPHY SOA
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