Arctic Ocean Tracer Studies

深水团的形成是一个重要的高纬度海洋过程，它使全球海洋的深水通风。这是一个活跃在北部边缘海和北冰洋本身的过程。该项目将通过用观测到的化学示踪剂数据约束北冰洋环流的数值模型来调查北冰洋的通风率。示踪数据可用于校准和验证数值模式提供的环流理论描述，并有助于确定与维持北冰洋垂直结构有关的具体过程。一大悬而未决的问题是维持盐跃层的营养物质最大值，这被归因于太平洋水通过白令海峡的平流，以及北极大陆架的营养物质再生。第二个问题是，北冰洋的通风在多大程度上受到陆架上形成的卤水及其随后在陆架断裂时流入深水的影响。在这种情况下，化学示踪剂的特别优势是，示踪剂提供信息和对时间尺度的限制，因此限制了旨在再现物理和动力学过程的模型的结果(并提高了真实性)。

The formation of deep water masses is a significant high latitude oceanic process that ventilates the deep waters of the global ocean. It is a process that is active in the northern marginal seas and in the Arctic Ocean itself. This project will investigate the rate of ventilation of the Arctic Ocean by constraining a numerical model of its circulation with observed chemical tracer data. The tracer data may be used to calibrate and verify the theoretical description of the circulation that is provided by numerical models, and can help to define specific processes that are related to the maintenance of the vertical structure of the Arctic Ocean. One major unresolved question is the maintenance of the nutrient maximum at the halocline level, which has been ascribed to the advection of Pacific water through the Bering Strait, and to nutrient regeneration on the Arctic continental shelves. A second question is the extent to which Arctic Ocean ventilation is affected by brine formation on the shelves and its subsequent cascading into deep water at the shelf break. The particular advantage of chemical tracers in this context is that tracers provide information and limits on time scales, and so constrain the results (and increase the level of realism) of models that were designed to reproduce physical and dynamical processes.