Offshore platform guarantee-oriented three-dimensional temperature and salt field analysis and forecasting method

Abstract

The invention provides an offshore platform guarantee-oriented three-dimensional temperature and salt field analysis and forecasting method. The method comprises the following steps of: carrying out marine dynamic environment element spatial and temporal distribution characteristic analysis and temperature and salt relation characteristic research on the basis of multi-source marine environment data; on the basis of spatial-temporal characteristic analysis and temperature-salinity relation characteristic research, constructing a statistical forecasting model of the marine environment dynamic elements by using a spatial-temporal empirical orthogonal function method; correcting the marine environment forecast field around the offshore platform based on the sea temperature and salinity observation data obtained by observation of the offshore platform by using a marine environment field dynamic analysis technology; and after temperature and salinity forecasting, adjusting the salinity by using a temperature-salinity relation curve, so that the temperature-salinity relation is kept not deviating from the climate state characteristics as much as possible. According to the method, the defect that the ocean dynamic environment element forecasting timeliness is short due to the limitation of weather-driven timeliness in a traditional numerical forecasting method is overcome, a high-performance computing platform is not needed in the forecasting process, and the occupation of computing resources is small.

Description

technical field [0001] The present invention relates to marine environment guarantee technology for offshore platforms, and especially designs an offshore platform guarantee technology based on Spatiotemporal Empirical Orthogonal Function (STEOF) and Three-Dimensional Variational Assimilation (3D-VAR). Three-dimensional temperature and salt field analysis and forecast method. The method of the present invention is mainly applied to the medium and long-term analysis and forecasting of marine dynamic environment elements during the navigation period of offshore platforms such as ships, underwater / surface unmanned submersibles, and offshore engineering, so as to solve the large-scale and long-term problems after the numerical prediction products of offshore platforms fail. The problem of self-guarantee of periodic marine environment. Background technique [0002] The marine environment is a general term for environmental conditions such as the marine atmospheric environment, t...

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Problems solved by technology

[0007] The present invention is aimed at the marine environment guarantee requirements of offshore platforms such as ships, underwater / surface unmanned submersibles, and offshore engineering, and develops a three-dimensional temperature and salt field for offshore platform guarantees based on time-space empirical orthogonal functions and three-dimensional variations. Analyzing and forecasting methods to improve the ability to analyze and forecast marine dynamic and environmental elements, so as to solve the problem of independent guarantee of large-scale and long-period marine environment after the failure of offshore platform numerical forecast products

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