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| Recent Progress in Applications of the Conditional Nonlinear Optimal Perturbation Approach to Atmosphere-Ocean Sciences |
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Citation： |
Mu MU,Kun ZHANG,Qiang WANG.Recent Progress in Applications of the Conditional Nonlinear Optimal Perturbation Approach to Atmosphere-Ocean Sciences[J].Chinese Annals of Mathematics B,2022,43(6):1033~1048 |
| Page view： 880
Net amount： 515 |
Authors： |
Mu MU; Kun ZHANG;Qiang WANG |
Foundation： |
National Natural Science Foundation of China (Nos. 41790475,92158202, 42076017, 41576015) and Guangdong Major Project of Basic and Applied Basic Research (No. 2020B0301030004). |
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| Abstract： |
The conditional nonlinear optimal perturbation (CNOP for short) approach is a powerful tool for predictability and targeted observation studies in atmosphere-ocean sciences. By fully considering nonlinearity under appropriate physical constraints, the CNOP approach can reveal the optimal perturbations of initial conditions, boundary conditions, model parameters, and model tendencies that cause the largest simulation or prediction uncertainties. This paper reviews the progress of applying the CNOP approach to atmosphere-ocean sciences during the past five years. Following an introduction of the CNOP approach, the algorithm developments for solving the CNOP are discussed.Then, recent CNOP applications, including predictability studies of some high-impact ocean-atmospheric environmental events, ensemble forecast, parameter sensitivity analysis, uncertainty estimation caused by errors of model tendency or boundary condition, are reviewed. Finally, a summary and discussion on future applications and challenges of the CNOP approach are presented. |
Keywords： |
Conditional nonlinear optimal perturbation, Atmosphere, Ocean, Targeted observation, Predictability |
Classification： |
17B40, 17B50 |
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