Ocean mixing by topography and mesoscale stirring

地形和中尺度搅拌引起的海洋混合

• 批准号: 327920-2011
• 负责人: Klymak, Jody
• 金额: $ 2.04万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=572132
• 关键词: Ocean; mixing; topography; mesoscale; stirring

The objective of the proposed research is to improve our understanding of the mixing processes that drive vertical transports in the ocean. This topic is of critical interest, given the role of ocean circulation in governing Earth's climate through gas and heat exchange, as well as nutrient distributions and productivity in the gyres and near the coasts. Surveys of the small-scale and short-lived features that cause mixing in the ocean will be undertaken with a tow-yo vehicle (purchased with CFI New Initiatives funds) capable of sampling extremely quickly. Field work will be carried out in collaboration with Prof. Eric Kunze (UVic) who has microstructure profiling instruments, and with colleagues at DFO and internationally. Over the next several years, my students and I will work on the following key projects, each of which focuses on aspects of ocean mixing: -- Lateral mixing in the North Pacific: We are still in the exciting discovery stage of determining processes that drive lateral mixing in the ocean. I propose to participate in Line-P cruises with my towed profiler in order to get snapshots of the seasonal thermocline on a regular basis. -- Energy cascade from tides to turbulence: The community is perplexed as to the fate of internal tidal energy. We propose to understand tidal mixing on near-critical slopes, and the scattering and breaking of large-scale internal tides as they impact continental shelves. -- Deep water renewal in fjords: My group plans to participate in overflow experiments in Knight Inlet, Saanich Inlet and the Strait of Georgia using moorings, our fast profiler, and dye to determine the physics of entrainment and detrainment in these overflows. -- Cross continental-shelf transport processes: we propose to examine enhanced upwelling in canyons on continental shelves.

拟议研究的目的是提高我们对驱动海洋垂直运输的混合过程的理解。 鉴于海洋环流通过气体和热量交换以及环流和海岸附近的营养分布和生产力在控制地球气候方面的作用，这一专题至关重要。对造成海洋混合的小规模和短暂特征的调查将使用能够非常快速地取样的拖溜球车（用CFI新倡议基金购买）进行。现场工作将与拥有微观结构分析仪器的Eric Kunze教授（UVic）以及DFO和国际上的同事合作进行。 在接下来的几年里，我和我的学生将致力于以下重点项目，每个项目都侧重于海洋混合的各个方面： 北太平洋的横向混合：我们仍处于确定驱动海洋横向混合的过程的令人兴奋的发现阶段。我建议与我的拖曳式剖面仪一起参加P线巡航，以便定期获得季节性温跃层的快照。 --从潮汐到湍流的能量级联：社区对内部潮汐能的命运感到困惑。 我们建议了解近临界斜坡上的潮汐混合，以及大规模内部潮汐影响大陆架时的散射和破碎。 --峡湾深水更新：我的小组计划参加奈特湾、萨尼奇湾和格鲁吉亚海峡的溢流实验，使用系泊设备、我们的快速剖面仪和染料，以确定这些溢流中夹带和排出的物理特性。 --跨大陆架迁移过程：我们建议研究大陆架峡谷中上升流增强的情况。