摘要
Adjoint-free calculation method is proposed to compute conditional nonlinear optimal perturbations(CNOP) combined with initial perturbations and model parameter perturbations. The new approach avoids the use of adjoint technique in the optimization process. CNOPs respectively generated by ensemble-based and adjoint-based methods are compared based on a simple theoretical model.
Adjoint-free calculation method is proposed to compute conditional nonlinear optimal perturbations（CNOP） combined with initial perturbations and model parameter perturbations. The new approach avoids the use of adjoint technique in the optimization process. CNOPs respectively generated by ensemble-based and adjoint-based methods are compared based on a simple theoretical model.
基金
supported by National Natural Science Foundation of China(Grant No.11201265)
Shandong Natural Science Foundation(Grant No.ZR2012AM003)
China Postdoctoral Science Foundation(Grant No.20110490564)
关键词
参数扰动
计算条件
非线性
伴随
自由
初始扰动
优化过程
模型
conditional nonlinear optimal perturbation （CNOP）, ensemble-based method, adjoint method
