Advances in Modeling Interactions Between Sea Ice and Ocean Surface Waves
Advances in Modeling Interactions Between Sea Ice and Ocean Surface Waves
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DOI：
10.1029/2019ms001836
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发表时间：
2019-12
影响因子：
6.8
通讯作者：
L. Roach;C. Bitz;Christopher M. Horvat;S. Dean
中科院分区：
文献类型：
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作者：
L. Roach;C. Bitz;Christopher M. Horvat;S. Dean
最近的实地项目强调了海冰镶嵌的综合性质对气候系统的重要性。因此，我们以前开发了一个基于过程的预测模型，该模型捕捉了海冰大小分布的关键特征及其随融化、冻结、新冰形成、焊接和海洋表面波破裂的演化。在这里，我们在早期工作的基础上，演示了海冰模型和海洋表面波之间的新耦合，以及开放水域中新的冰形成的新的基于物理的参数化。这里介绍的实验是第一次在全球范围内包括预测演变的海浪和海冰之间的双向相互作用。模拟的面积平均浮标周长与北极现有观测数据具有相似的量级，并显示出看似合理的空间变异性。在融化季节，海浪破裂是导致单位海冰面积浮冰周长变化的主要FSD过程--该数量决定了横向融化导致的浓度变化--突显了海浪-冰相互作用对边缘冰区热力学的重要性。此外，我们还将结果解释为目标空间尺度和过程，对于这些空间尺度和过程，浮体大小观测可以最有效地提高模型保真度。
Recent field programs have highlighted the importance of the composite nature of the sea ice mosaic to the climate system. Accordingly, we previously developed a process‐based prognostic model that captures key characteristics of the sea ice floe size distribution and its evolution subject to melting, freezing, new ice formation, welding, and fracture by ocean surface waves. Here we build upon this earlier work, demonstrating a new coupling between the sea ice model and ocean surface waves and a new physically based parameterization for new ice formation in open water. The experiments presented here are the first to include two‐way interactions between prognostically evolving waves and sea ice on a global domain. The simulated area‐average floe perimeter has a similar magnitude to existing observations in the Arctic and exhibits plausible spatial variability. During the melt season, wave fracture is the dominant FSD process driving changes in floe perimeter per unit sea ice area—the quantity that determines the concentration change due to lateral melt—highlighting the importance of wave‐ice interactions for marginal ice zone thermodynamics. We additionally interpret the results to target spatial scales and processes for which floe size observations can most effectively improve model fidelity.