Collaborative Research: Internal Waves and Mixing on the Near-Critical Oregon Continental SlopeNear-Critical Oregon Continental Slope

合作研究：近临界俄勒冈大陆坡上的内波和混合Near-Critical Oregon Continental Slope

• 批准号: 0350647
• 负责人: Matthew Alford
• 金额: $ 96.35万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0350647&HistoricalAwards=false
• 关键词: Collaborative; Research; Internal; Waves; Mixing

ABSTRACTOCE-0350647Breaking of shoaling internal waves is a likely cause for the enhanced mixing observed above continental slopes. The PI's will deploy moored profilers and use ship-based instruments to examine the internal wave climate and energy budget on the Oregon continental slope. Particular attention will be paid to the low-mode internal wave energy-flux impinging onto the slope from the deep ocean, its interaction with cross-isobath topography, and the relationship between cross-isobath energy-flux convergence and turbulent energy dissipation/mixing. This approach allows quantification of an energy budget between incoming and outgoing internal waves, and the turbulent sink. Based on the physical characteristics of the area and on earlier work on the Virginia continental slope, it is expected that the energetics will be dominated by incident low-mode internal tides being critically reflected to high wavenumbers, with consequent elevated losses to turbulence. Sampling will capture the impinging low-mode energy flux and the reflected/scattered low and high wavenumbers. The Turbulent dissipation and mixing will be measured from overturning scales and inferred from finescale parameterizations which showed skill on the Virginia continental slope and on the flanks of the Hawaiian Ridge. The results of this research will contribute to better understanding of the sinks for internal waves generated in the deep ocean and the role of elevated turbulence on the continental slope in abyssal mixing.Broader Impacts: Where and how mixing and turbulent dissipation takes place are long-standing and fundamental questions with far-reaching implications for large scale ocean circulation. The results of this research will contribute to better understanding of these areas. In addition this project will also integrate ocean waves into pre-college classrooms through existing programs at K-6 and high-school levels. At least one female graduate student will participate in the research cruise.

浅滩内波破裂的摘要-0350647可能是在大陆斜坡上方观察到的加强混合的原因。 PI将部署系泊的牧师，并使用基于船舶的工具来检查俄勒冈大陆坡上的内部波浪气候和能源预算。 将特别注意从深海撞击斜率上的低模式内波能量，其与跨疗法地形的相互作用以及交叉异化能量升华收敛与湍流能量耗散/混合之间的关系。这种方法允许在传入和传出的内部波和湍流水槽之间量化能源预算。基于该地区的物理特征以及对弗吉尼亚大陆斜率的早期工作，预计能量学将由事件低模式内部潮汐批评为高波数，从而占主导地位。采样将捕获撞击低模式的能量通量以及反射/散射的低和高波数。湍流耗散和混合将通过倾覆的量表来测量，并通过罚款刻度参数推断出，这些参数在弗吉尼亚大陆坡上和夏威夷山脊的侧面上显示了技巧。这项研究的结果将有助于更好地理解深海中产生的内部波的水槽，以及在深渊混合中湍流对大陆斜率的作用。BRODER的影响：在哪里以及如何在哪里以及如何在何处和湍流耗散发生较长的和基本的问题，对大型海洋循环产生了深远的含义。这项研究的结果将有助于更好地理解这些领域。此外，该项目还将通过K-6和高中级别的现有计划将海浪纳入预科课堂。至少一名女研究生将参加研究巡游。