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Optimal boundary conditions for ORCA-2 model

机译:ORCA-2模型的最佳边界条件

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A 4D-Var data assimilation technique is applied to ORCA-2 configuration of the NEMO in order to identify the optimal parametrization of boundary conditions on the lateral boundaries as well as on the bottom and on the surface of the ocean. The influence of boundary conditions on the solution is analyzed both within and beyond the assimilation window. It is shown that the optimal bottom and surface boundary conditions allow us to better represent the jet streams, such as Gulf Stream and Kuroshio. Analyzing the reasons of the jets reinforcement, we notice that data assimilation has a major impact on parametrization of the bottom boundary conditions for u and v. Automatic generation of the tangent and adjoint codes is also discussed. Tapenade software is shown to be able to produce the adjoint code that can be used after a memory usage optimization.
机译:将4D-Var数据同化技术应用于NEMO的ORCA-2配置,以便确定横向边界以及海底和海面边界条件的最佳参数化。在同化窗口之内和之外都分析了边界条件对解的影响。结果表明,最佳的底部和表面边界条件使我们能够更好地表示喷射流,例如墨西哥湾流和黑潮。通过分析射流强化的原因,我们注意到数据同化对u和v的底边界条件的参数化有重大影响。还讨论了切线和伴随代码的自动生成。 Tapenade软件显示出能够生成内存优化使用后可以使用的伴随代码。

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