The Effect of Mesoscale Physics on the Upper Ocean Carbon Cycle

主题：实地研究和全球尺度模式中中尺度物理对上层海洋碳循环的影响，人们很难理解如何提供溶解的营养物质来支持观测到的涡流扩散输送和生产需求之间的差异：(1)营养物质在直到最近还在“看不见”的溶解有机质池中的输送；(2)通过间歇性混合或注入营养物质的方式输送无机营养物质。根据最近的工作，与锋面和涡旋相关的上层海洋中的中尺度上升流可能会驱动重大的垂直营养物质输送。全球尺度环流营养循环模式无法再现观测到的上层海洋营养循环，除非采用(1)溶解有机营养素形式的营养物质输送，或(2)海面无机营养物质浓度增加，这可能允许不切实际的水平平流输送。GCM的结果可能会因为对导致真实海洋中垂直营养物质输送的中尺度过程的不充分分辨率而产生偏差。为了验证这一假设，将使用Semtner和Chervin(1992)的涡旋解析环流模型中的物理变量来运行营养动力学模型。

Subject: The Effect of Mesoscale Physics on the Upper Ocean Carbon Cycle In field studies and in global scale models, it has been difficult to understand how dissolved nutrients are supplied to support the observed discrepancy between eddy diffusive transport and production demand: (1) the transport of nutrients in the until recently "invisible" pool of dissolved organic matter; (2) the transport of inorganic nutrients by episodic mixing or nutrient injection. According to recent work, mesoscale upwelling in the upper ocean associated with fronts and eddies may drive a significant vertical nutrient transport. Global scale circulation nutrient cycle models are unable to reproduce the observed nutrient cycle in the upper ocean without recourse to either (1) transport of nutrients in the form of dissolved organic nutrients, or (2) incresased concentrations of inorganic nutrients at the sea surface, which allows presumably unrealistic horizontal advective transport. GCM results may be biased by inadequate resolution of the mesoscale processes that are responsible for vertical nutrient transport in the real ocean. To test this hypothesis, a nutrient dynamics model will be run with the physical variables from the eddy-resolving circulation model of Semtner and Chervin (1992).