Estimating parameters for coupled air-sea model with variational method

被引：7

作者：

Song Jun-Qiang ^{[1
]}

Cao Xiao-Qun ^{[1
]}

Zhang Wei-Min ^{[1
]}

Zhu Xiao-Qian ^{[1
]}

机构：

[1] Natl Univ Def Technol, Sch Comp Sci, Changsha 410073, Hunan, Peoples R China

来源：

ACTA PHYSICA SINICA | 2012年 / 61卷 / 11期

基金：

中国国家自然科学基金;

关键词：

air-sea coupled model; parameter estimation; limit cycle; variational method; EL-NINO; ITERATION METHOD; OSCILLATOR; PRINCIPLE; DYNAMICS;

D O I：

10.7498/aps.61.110401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper a method is presented to estimate the unknown parameters of nonlinear El Nino/La Nino-Southern Oscillation model based on the variational principle. Firstly, the equation of the coupled air-sea model is included into the objective functional. Secondly, the formulas of the adjoint equation and the functional gradient for unknown parameters are derived using the variational method. Finally, the algorithm to estimate unknown parameters of air-sea oscillator system is designed according to the above formulas. The numerical simulation results show that the proposed method is very effective and feasible to estimate the unknown parameters of nonlinear air-sea coupled dynamical system.

引用

页数：8

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