Arctic Ocean Tracer Studies

北冰洋示踪研究

• 批准号: 8800025
• 负责人: H. Ostlund
• 金额: $ 4万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1990-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8800025&HistoricalAwards=false
• 关键词: Arctic; Ocean; Tracer; Studies

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.

深水水团的形成是一个显着的高纬度 使全球海洋深层沃茨通风的海洋过程。 它 是一个活跃在北方边缘海和 北冰洋本身。 本项目将调查 通过限制其数值模型， 循环与观察到的化学示踪剂数据。 跟踪器数据可以是 用于校准和验证的理论描述 数值模式提供的环流，可以帮助定义 与维护垂直系统相关的具体过程 北冰洋的结构。 一个尚未解决的主要问题是维持营养最大值 在盐跃层水平，这已被归因于平流的 太平洋水通过白令海峡，并对营养再生 北极大陆架 第二个问题是， 北冰洋的通风受到了 陆架及其随后在陆架断裂处向深水倾泻而下。 在这种情况下，化学示踪剂的特别优点是， 跟踪器提供时间尺度上的信息和限制， 模型的结果（并提高现实主义水平）， 用来重现物理和动力过程