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首页> 外文期刊>Journal of Computational Physics >The application of Jacobian-free Newton-Krylov methods to reduce the spin-up time of ocean general circulation models
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The application of Jacobian-free Newton-Krylov methods to reduce the spin-up time of ocean general circulation models

机译:无雅可比牛顿-克雷洛夫方法的应用减少海洋总环流模型的自旋时间

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摘要

In present-day forward time stepping ocean-climate models, capturing both the wind-driven and thermohaline components, a substantial amount of CPU time is needed in a so-called spin-up simulation to determine an equilibrium solution. In this paper, we present methodology based on Jacobian-Free Newton-Krylov methods to reduce the computational time for such a spin-up problem. We apply the method to an idealized configuration of a state-of-the-art ocean model, the Modular Ocean Model version 4 (MOM4). It is shown that a typical speed-up of a factor 10-25 with respect to the original MOM4 code can be achieved and that this speed-up increases with increasing horizontal resolution.
机译:在当今向前的时间步进海洋气候模型中,同时捕获了风驱动和热盐分,在所谓的加速模拟中需要大量的CPU时间来确定平衡解。在本文中,我们提出了基于Jacobian-Free Newton-Krylov方法的方法,以减少此类自旋问题的计算时间。我们将该方法应用于最新海洋模型(模块化海洋模型第4版(MOM4))的理想配置。结果表明,相对于原始的MOM4代码,典型的速度提高了10-25倍,并且这种速度随着水平分辨率的提高而增加。

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