Modelling wave-induced sea ice break-up in the marginal ice zone.
Modelling wave-induced sea ice break-up in the marginal ice zone.
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DOI：
10.1098/rspa.2017.0258
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发表时间：
2017-10
期刊：
影响因子：
--
通讯作者：
Squire VA
中科院分区：
文献类型：
--
作者：
Montiel F;Squire VA
建立了一个边缘冰区（MIZ）浮冰在波浪作用下的破碎模型，研究了浮冰在多次波浪破碎事件下的尺寸分布。一个三维线性模型的海浪散射的有限阵列的兼容圆形浮冰耦合到一个弯曲故障模型，它打破了一个浮冰成两个浮冰的二维应力场满足破碎准则。设计了一种闭环反馈算法，该算法（i）解决了在时谐平面波强迫下给定FSD的波散射问题，（ii）计算所有絮凝体中的应力场，（iii）使满足破碎准则的絮凝体破裂，以及（iv）生成更新的FSD，初始化循环的下一次迭代的几何形状。50个破碎事件后的FSD是单峰和接近正常，或双峰，表明波单独不支配的幂律在一些领域的研究中观察到的。多次散射被发现，以提高打破了长波和薄冰，但减少打破了短波和厚冰。在后一种情况下，由于波浪引起的断裂削弱了冰盖，使波浪能够更深入地进入MIZ。
A model of ice floe break-up under ocean wave forcing in the marginal ice zone (MIZ) is proposed to investigate how floe size distribution (FSD) evolves under repeated wave break-up events. A three-dimensional linear model of ocean wave scattering by a finite array of compliant circular ice floes is coupled to a flexural failure model, which breaks a floe into two floes provided the two-dimensional stress field satisfies a break-up criterion. A closed-feedback loop algorithm is devised, which (i) solves the wave-scattering problem for a given FSD under time-harmonic plane wave forcing, (ii) computes the stress field in all the floes, (iii) fractures the floes satisfying the break-up criterion, and (iv) generates an updated FSD, initializing the geometry for the next iteration of the loop. The FSD after 50 break-up events is unimodal and near normal, or bimodal, suggesting waves alone do not govern the power law observed in some field studies. Multiple scattering is found to enhance break-up for long waves and thin ice, but to reduce break-up for short waves and thick ice. A break-up front marches forward in the latter regime, as wave-induced fracture weakens the ice cover, allowing waves to travel deeper into the MIZ.
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DOI：
10.1098/rspa.2011.0155
发表时间：
2012-01-08
影响因子：
3.5
作者：
Bennetts, Luke G.;Squire, Vernon A.
通讯作者：
Squire, Vernon A.
影响因子：
3.6
作者：
Dumont, D.;Kohout, A.;Bertino, L.
通讯作者：
Bertino, L.
影响因子：
3.6
作者：
Kohout, A. L.;Meylan, M. H.
通讯作者：
Meylan, M. H.
影响因子：
3.6
作者：
Meylan, MH;Squire, VA
通讯作者：
Squire, VA
影响因子：
1.9
作者：
Montiel, Fabien;Squire, Vernon A.;Bennetts, Luke G.
通讯作者：
Bennetts, Luke G.