Near-inertial wave generation, propagation, and shoaling in a seasonally ice-covered ocean

季节性冰覆盖海洋中的近惯性波产生、传播和浅滩

• 批准号: 0909432
• 负责人: Harper Simmons
• 金额: $ 25.96万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0909432&HistoricalAwards=false
• 关键词: Near; inertial; wave; generation; propagation

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).The PI proposes to leverage the ongoing ICORTAS (Ice-Covered Ocean Response to Atmospheric Storms) field observations by augmenting the existing scientific goals to include a modeling component that will capitalize on a model?s ability to resolve temporal and spatial fields, aiding in interpretation of the data. Specific new goals will be a focus on shoaling and dissipation of near-inertial wave groups as they are absorbed or scatter at the continental shelf break. The PI will use the fact that the study area, the Beaufort Sea shelf and slope, is seasonally ice-free to explore the impact that a changing ice cover may have on internal wave energy levels, both through changes in the efficiency of generation, and changes in under-ice dissipation. Simulations will be tightly linked to the field data, using measured upper ocean sea-ice drift and deformation, currents and remote sensing products. In particular, the study will address the following new questions:1) How much of the observed downward energy flux out of the ice-covered ocean reaches the continental slopes?2) Does the measured incoming energy flux accumulate at the shelf-break, which is critical to almost all internal waves in the Arctic?3) Is this energy accumulation sufficient to account for the implied mixing rates required to ventilate the abyssal Beaufort Sea?4) What are the relative efficiencies and damping rates of near-inertial waves subject to bottom, under-ice, open water, and critical slope reflections?

该奖项是根据2009年的《美国恢复和再投资法》（公法111-5）资助的。PI提议通过将现有科学目标扩大的建模组件包括在模型上利用模型来解决时间和散布领域的能力，以解决一个数据，以解决一个数据，该模型可以利用一个模型，以解决一个数据，该模型可以在一个数据上，一定的数据来实现一个数据，该模型可以利用一个模型来实现，该模型将利用现有科学目标，以利用现有的科学目标来利用现有的科学目标，以利用现有的科学目标来利用持续的ICORTA（冰覆盖的海洋反应）。特定的新目标将重点放在近惯性波群的浅滩和耗散上，因为它们在大陆架子上被吸收或分散。 PI将使用以下事实：研究区域Beaufort Sea架子和坡度在季节性冰上无冰，以探索冰盖不断变化的影响可能会通过变化的发电效率和冰底片耗散的变化而对内部波能水平产生的影响。模拟将使用测量的上海冰漂移和变形，电流和遥感产品将模拟与现场数据密切相关。 特别是，该研究将解决以下新问题：1）从冰覆盖的海洋中观察到多少向下的能量通量到达大陆斜率？2）2）测得的传入能量通量是否在货架上积聚在货架上突出，这几乎对北极中的所有内部波动至关重要，这对北极的所有内部波动至关重要？近惯性波的效率和阻尼速率受底部，冰底，开放水和临界斜率反射的影响？