A thermocline nutrient pump

温带陆架海的季节性温跃层是陆架海系统的一个重要界面。它是垂直交换的物理屏障，控制整个夏季的生物生长，并使大气中的二氧化碳得以封存。一旦春季水华结束，季节性的温跃层将阳光普照但营养耗尽的表层沃茨与营养丰富的深色深水分开。季节性温跃层中营养物质的垂直混合作用将这一光照良好的表层区域与深水营养物质供应相结合，导致在温跃层内形成一层浮游植物（次表层叶绿素最大值）。据估计，这种现象占季节性分层的陆架海年度碳固定的一半左右，然而，控制物理学才刚刚解开。确定和参数化的物理过程，负责整个温跃层的营养物质的垂直混合是一个至关重要的先决条件，我们的理解大陆架海洋生态系统。我们的建议是调查风驱动的惯性振荡在驱动垂直混合的季节性温跃层的作用，确定的机制和过程，负责他们的产生和耗散的特殊和时间尺度。该提案将通过一项观测活动与使用一维和三维数值模型的数值模型预测密切结合来实现。

The seasonal thermocline in temperate shelf seas acts as a critical interface in the shelf sea system. It is a physical barrier to vertical exchange, controlling biological growth through the summer and enabling the sequestration of atmospheric CO2. Once the spring bloom is over the seasonal thermocline separates the sun drenched but nutrient deplete surface waters from the dark nutrient rich deep water. The vertical mixing of nutrients across the seasonal thermocline acts to couple this well-lit surface zone with the deep water nutrient supply, leading to the formation of a layer of phytoplankton within the thermocline (the subsurface chlorophyll maxima). This phenomenon is estimated to account for about half of the annual carbon fixation in seasonally stratified shelf seas, and yet the controlling physics is only just being unravelled. The identification and parameterisation of the physical processes which are responsible for the vertical mixing of nutrients across the thermocline is a vital prerequisite to our understanding of shelf sea ecosystems. Our proposal is to investigate the role of wind driven inertial oscillations in driving vertical mixing across the seasonal thermocline, identifying the mechanisms and processes responsible for their generation and dissipation on both special and temporal scales. The proposal will be achieved through an observational campaign closely integrated with numerical model predictions using both 1D and 3D numerical models.