墨西哥湾波浪-环流耦合模型中减阶源项的功效

IF 3.1 3区 地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES Ocean Modelling Pub Date : 2024-05-21 DOI:10.1016/j.ocemod.2024.102387
Mark Loveland , Jessica Meixner , Eirik Valseth , Clint Dawson
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引用次数: 0

摘要

在飓风期间,波浪-环流耦合模型是保障公共安全的重要工具。标准的方法是使用高保真环流模型和使用最先进源项的波浪模型。因此,本研究调查了在波浪-环流耦合模型的波浪模型部分使用简化(降阶)源项的潜在后果。针对影响墨西哥湾的两场风暴--飓风艾克和飓风艾达,对运行时间和观测精度之间的权衡进行了量化。将水面高程以及波浪统计数据(显著波高、峰值周期和平均波向)与观测数据进行了比较。使用减阶源项大大节省了计算成本。此外,在我们的计算实验中还观察到,在使用减阶源项进行模拟时,与观测结果相比,额外误差相对较小。然而,根据对源项(尤其是在每个飓风的路径附近)的选择,可以观察到波浪统计的全球模式输出发生了很大变化。
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Efficacy of reduced order source terms for a coupled wave-circulation model in the Gulf of Mexico

During hurricanes, coupled wave-circulation models are critical tools for public safety. The standard approach is to use a high fidelity circulation model coupled with a wave model that uses the most advanced source terms. As a result, the models can be computationally expensive and so this study investigates the potential consequences of using simplified (reduced order) source terms within the wave model component of the coupled wave-circulation model. The trade-off between run time and accuracy with respect to observations is quantified for a set of two storms that impacted the Gulf of Mexico, Hurricane Ike and Hurricane Ida. Water surface elevations as well as wave statistics (significant wave height, peak period, and mean wave direction) are compared to observations. The usage of the reduced order source terms yielded significant savings in computational cost. Additionally, relatively low amounts of additional error with respect to observations during the simulations with reduced order source terms are observed in our computational experiments. However, large changes in global model outputs of the wave statistics were observed based on the choice of source terms particularly near the track of each hurricane.

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来源期刊
Ocean Modelling
Ocean Modelling 地学-海洋学
CiteScore
5.50
自引率
9.40%
发文量
86
审稿时长
19.6 weeks
期刊介绍: The main objective of Ocean Modelling is to provide rapid communication between those interested in ocean modelling, whether through direct observation, or through analytical, numerical or laboratory models, and including interactions between physical and biogeochemical or biological phenomena. Because of the intimate links between ocean and atmosphere, involvement of scientists interested in influences of either medium on the other is welcome. The journal has a wide scope and includes ocean-atmosphere interaction in various forms as well as pure ocean results. In addition to primary peer-reviewed papers, the journal provides review papers, preliminary communications, and discussions.
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