The validity of the tangent linear model(TLM)is studied numerically using the example of the Lorenz equations in this paper.The relationship between the limit of the validity time of the TLM and initial perturbations ...The validity of the tangent linear model(TLM)is studied numerically using the example of the Lorenz equations in this paper.The relationship between the limit of the validity time of the TLM and initial perturbations for the Lorenz equations is investigated using the Monte Carlo sampling method.A new error function between the nonlinear and the linear evolution of the perturbations is proposed.Furthermore,numerical sensitivity analysis is carried to establish the relationship between parameters and the validity of the TLM,such as the initial perturbation,the prediction time,the time step size and so on,by the method of mathematical statistics.展开更多
基金This project is Supported by the National Natural Science Foundation of China(Grant Nos.11471166 and 11426134)the Natural Science Foundation of Jiangsu Province(Grant No.BK20141443).
文摘The validity of the tangent linear model(TLM)is studied numerically using the example of the Lorenz equations in this paper.The relationship between the limit of the validity time of the TLM and initial perturbations for the Lorenz equations is investigated using the Monte Carlo sampling method.A new error function between the nonlinear and the linear evolution of the perturbations is proposed.Furthermore,numerical sensitivity analysis is carried to establish the relationship between parameters and the validity of the TLM,such as the initial perturbation,the prediction time,the time step size and so on,by the method of mathematical statistics.
