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

浅水内波的破碎可能是在大陆坡上观测到的混合增强的原因。 PI将部署系泊剖面仪，并使用船载仪器来检查俄勒冈州大陆坡的内波气候和能量收支。 将特别注意从深海撞击斜坡的低模态内波能量通量、其与跨等深线地形的相互作用以及跨等深线能量通量会聚与湍流能量耗散/混合之间的关系。这种方法允许量化的能量预算之间的传入和传出的内波，和湍流汇。根据该地区的物理特性和早先对弗吉尼亚大陆坡的研究，预计能量学将由入射的低模式内潮主导，这些内潮被严格地反射到高波数，从而导致湍流损失增加。采样将捕获撞击的低模式能量通量和反射/散射的低和高波数。湍流耗散和混合将从翻转尺度进行测量，并从弗吉尼亚大陆坡和夏威夷海脊侧翼的细尺度参数化中推断。这项研究的结果将有助于更好地了解在深海产生的内波的汇和在深海混合中大陆坡上升高的湍流的作用。更广泛的影响：混合和湍流耗散在哪里以及如何发生是长期存在的基本问题，对大尺度海洋环流具有深远的影响。这项研究的结果将有助于更好地了解这些领域。此外，该项目还将通过现有的K-6和高中课程，将海浪融入大学预科课程。至少有一名女研究生将参加研究航行。

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.