利用 SUMMA 和 SUNDIALS 对陆地模型进行精确高效的数值模拟

IF 4.4 2区 地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES
Raymond J. Spiteri, Ashley E. Van Beusekom, Kyle Klenk, Reza Zolfaghari, Sean J. Trim, Wouter J. M. Knoben, Andrew M. Ireson, Martyn P. Clark
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引用次数: 0

摘要

没有误差控制的陆地模型数值模拟可能非常不准确。我们介绍了非线性和微分代数方程求解器套件(SUNDIALS),用于求解统一多重建模替代方案结构(SUMMA)土地模型中的热力学和水文过程模拟方程。SUNDIALS 的算法特点,如误差估计、自适应阶次和步长控制,使得 SUMMA-SUNDIALS 模型与之前的 SUMMA 模型相比,在精度和相对计算效率方面都有大幅提高。通过对北美大陆超过 500,000 个空间元素的模拟,结果得到了验证。与之前的 SUMMA 模型相比,我们发现在计算成本相同的情况下,SUMMA-SUNDIALS 模型的模拟结果更接近收敛解。SUMMA-SUNDIALS 模型能够高效地进行更可靠的模拟,因此成为了增进我们对地球系统陆地部分了解的有力工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Accurate and Efficient Numerical Simulation of Land Models Using SUMMA With SUNDIALS

Accurate and Efficient Numerical Simulation of Land Models Using SUMMA With SUNDIALS

Numerical simulation of land models without error control can be highly inaccurate. We present the incorporation of the Suite of Nonlinear and Differential-Algebraic Equation Solvers (SUNDIALS) package to solve the equations that simulate thermodynamics and hydrologic processes in the Structure for Unifying Multiple Modeling Alternatives (SUMMA) land model. The algorithmic features of SUNDIALS, such as error estimation and adaptive order and step-size control, result in a SUMMA-SUNDIALS model that delivers substantially improved accuracy and relative computational efficiency compared to integration with the previous SUMMA model, which uses the low-order backward Euler method with no rigorous error control. The results are demonstrated through simulations over the North American continent with more than 500,000 spatial elements. Compared to the previous SUMMA model, we find that the simulations produced by the SUMMA-SUNDIALS model are orders of magnitude closer to converged solutions for the same computational cost. Being able to efficiently perform more reliable simulations makes the SUMMA-SUNDIALS model a powerful tool for improving our understanding of the terrestrial component of the Earth System.

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来源期刊
Journal of Advances in Modeling Earth Systems
Journal of Advances in Modeling Earth Systems METEOROLOGY & ATMOSPHERIC SCIENCES-
CiteScore
11.40
自引率
11.80%
发文量
241
审稿时长
>12 weeks
期刊介绍: The Journal of Advances in Modeling Earth Systems (JAMES) is committed to advancing the science of Earth systems modeling by offering high-quality scientific research through online availability and open access licensing. JAMES invites authors and readers from the international Earth systems modeling community. Open access. Articles are available free of charge for everyone with Internet access to view and download. Formal peer review. Supplemental material, such as code samples, images, and visualizations, is published at no additional charge. No additional charge for color figures. Modest page charges to cover production costs. Articles published in high-quality full text PDF, HTML, and XML. Internal and external reference linking, DOI registration, and forward linking via CrossRef.
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