Ocean mixing by topography and mesoscale stirring

拟议研究的目的是提高我们对海洋中驱动垂直输送的混合过程的理解。鉴于海洋环流通过气体和热量交换在控制地球气候中的作用，以及环流和沿海附近的营养物质分布和生产力，这一专题具有重要意义。对造成海洋混合的小规模和短暂特征的调查将使用能够以极快的速度采样的拖溜车(由CFI新倡议基金购买)进行。现场工作将与拥有显微结构剖面仪的埃里克·昆泽教授(UVic)以及DFO的同事和国际上的同事合作进行。 在接下来的几年里，我和我的学生们将致力于以下关键项目，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：我们仍处于确定推动海洋横向混合的过程的令人兴奋的发现阶段。我建议带着我的拖曳剖面仪参加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：人们对内潮汐能的命运感到困惑。我们建议理解近临界斜坡上的潮汐混合，以及大规模内潮在冲击大陆架时的散射和破裂。 --峡湾的深水更新：我的团队计划在奈特湾、萨尼奇湾和佐治亚州海峡参加溢流实验，使用我们的快速剖面仪系泊和染料来确定这些溢流中的卷吸和剥离物理。 --跨大陆架运输过程：我们建议研究大陆架上峡谷中增强的上升流。

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.