Significant wave height and wave period parameterization method

A technology of effective wave height and period parameters, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems that the applicability needs to be further verified and cannot fully reflect the characteristics of the sea and air, and achieve strong applicability and reliability. Strong transplant effect

Active Publication Date: 2014-11-26
PLA UNIV OF SCI & TECH
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However, since most of the observational data used in the above studies come from the North Atlantic, the North Sea, the Gulf of Mexico, and Hawaii, they cannot fully reflect the characteristics of the sea and air in the ea

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  • Significant wave height and wave period parameterization method
  • Significant wave height and wave period parameterization method
  • Significant wave height and wave period parameterization method

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[0026] Step 1: Since the five fixed buoy stations of JMA of the Japan Meteorological Agency provide the wind speed at a height of 7.5m, and before July 31, 1990, only the average wave height and average wave period obtained by the method of crossing the zero point are provided, so first To convert the wind speed at the observation height to the 10m wind speed U10 , transform the average wave height and wave period into effective wave height and wave period. Among them, the average wave height and average wave period of the upper crossing zero point can be converted into effective wave height and effective wave period by multiplying coefficients 1.6 and 1.35 respectively. The 10m wind speed U 10 The conversion method is as follows:

[0027] Wind speed roughness height z 0 Satisfy between the wind speed u(z) at a given height z:

[0028] u * = κ u ( z ...

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Abstract

A significant wave height and wave period parameterization method comprises the following steps that 1. buoy data of five fixed buoy stations of JMA, satellite height meter significant wave height hs provided by AVISO and 1 degree * 1 degree reanalysis grid point data of sea surface 10 m wind speed are obtained, wind speed at observed height is converted into 10 m height wind speed U10, average wave height and an average wave period are converted into significant wave height hs and a significant wave period Tp; 2.based on a data mining technology, according to the proportion of 2 : 1 : 1, the five fixed buoy stations and data of height meter grid point information are divided into a training set, a verifying set ad a testing set, and data obtained through a 44008 station are only divided into a verifying set and a testing set according to the proportion of 1 : 1; and 3. the significant wave height parameterization method is established and verified.

Description

1. Technical field [0001] The present invention relates to a parameterization method of significant wave height and significant wave period applicable to the sea area in the east of my country. Specifically, it seeks a method that can reasonably describe the influence of wave characteristics on sea surface roughness in the air-sea flux algorithm and atmospheric numerical prediction model. simplification method. 2. Background technology [0002] Important marine weather processes such as the growth of wind waves, storm surges, and atmospheric circulation are closely related to the momentum exchange of the air-sea surface, and the accurate determination of the momentum exchange of the air-sea surface mainly depends on: (1) a reasonable description of the dependence of the stability; (2 ) to accurately determine the roughness of sea surface wind speed. As a small-scale ocean motion phenomenon that exists at the interface between the atmosphere and the ocean, ocean waves directl...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 丁菊丽费建芳黄小刚程小平胡晓华季亮刘磊
Owner PLA UNIV OF SCI & TECH
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