Sea Ice Tide-Inertial Interaction: Observations and Modeling

提供的资金，以支持观测和模拟计划，旨在阐明的物理机制的相互作用的潮汐，边界层惯性振荡，海冰的非线性力学。 拟议的观测研究和建模/数据分析工作的物理假设是，海冰覆盖必须被视为模型中海洋边界层的固有部分，而不是仅在界面处传递应力的单独实体。 该项目将部署两个自主浮标阵列，作为合作冰基观测系统的一部分，监测东西伯利亚海和博福特海的中尺度海冰变形一年。 将研究两个漂流站海冰厚度分布的演变，解决动力学和热力学过程。 这项研究将阐明高频变形在海洋-大气通量、海洋盐通量和冰质量平衡中的作用。 观测与冰-海洋潮汐-惯性模型的协调将提供对非线性冰力学如何影响冰-海洋耦合和潮汐特性的深入了解。 主要研究人员正在开发一个正压冰-海洋模型，包括一个含有嵌入海冰的海洋上层边界层，以便上层海洋的净埃克曼输送包括冰和水。 建模工作的重点是与观测结果进行详细比较。

Funds are provided to support an observational and modeling program aimed at elucidating the physical mechanisms underlying the interaction of tides, boundary layer inertial oscillations, and the nonlinear mechanics of sea ice. The physical hypothesis underlying both the proposed observational studies and the modeling/data analysis efforts is that sea ice cover must be considered an intrinsic part of the oceanic boundary layer in models rather than a separate entity only transferring stress at the interface. This project will deploy two autonomous buoy arrays, as part of a collaborative ice-based observing system, to monitor mesoscale sea ice deformation in the East Siberian Sea and Beaufort Sea for one year. Evolution of sea ice thickness distribution at both drifting stations will be investigated, resolving both dynamic and thermodynamic processes. The study will elucidate the role of high frequency deformation in ocean-atmosphere fluxes, salt fluxes to the ocean, and ice mass balance. Coordination of observations with ice-ocean tidal-inertial modeling will provide insight into how nonlinear ice mechanics effects ice-ocean coupling and tidal characteristics. The principal investigators are developing a barotropic ice-ocean model including an upper ocean boundary layer with imbedded sea ice so that net Ekman transport in the upper ocean includes both ice and water. The focus of the modeling effort is on a detailed comparison with observations.