Investigation of Arctic Ocean Dynamics

北冰洋动力学研究

基本信息

批准号：
1107412
负责人：
Jiayan Yang
金额：
$ 35万
依托单位：
Woods Hole Oceanographic Institution
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2011
资助国家：
美国
起止时间：
2011-08-01 至 2014-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1107412&HistoricalAwards=false
关键词：
Investigation Arctic Ocean Dynamics

项目摘要

Funds are provided to investigate a set of fundamental dynamical processes in the Arctic Ocean where the â-effect is small and the western ocean boundary is absent. Results will contribute to understanding a series of important issues concerning the circulation and state of the Arctic Ocean, such as: Does the Sverdrup balance hold in the Arctic? Do Rossby waves still play the central role in the spin up of an oceanic gyre in the Arctic? How does the ocean respond to changes in wind near the North Pole where Rossby waves are supposed to be nonexistent or stagnant? What role do eddies play in the potential vorticity balance? How does the ocean spin up to a quasi-equilibrium state if there is no western ocean boundary? Do winds or thermohaline factors dominate and shape the arctic?s ocean circulation? Why does the Atlantic water penetrate to the Arctic Ocean? Does it go to the Arctic to replace surface water forced by winds to go out of the Arctic (wind-driven theory) or in order to satisfy salt and heat balances (thermohaline theory)?An accepted theory of ocean circulation has been developed over the past century based on studies of the subtropical and tropical gyres, such as the Gulf Stream system. The validity of the assumptions on which this theory is based is questionable in the Arctic Ocean. This study will enhance our understanding of the fundamental physics controlling Arctic Ocean circulation and our ability to predict the changes in circulation patterns that may result from changes in forcing and, hence, our ability to predict the drift of material in the Arctic Ocean.

提供了资金来研究北极海洋中的一系列基本动态过程，该过程效果很小，没有西部海洋边界。结果将有助于理解有关北极海洋循环和状态的一系列重要问题，例如：Sverdrup平衡在北极中是否存在？罗斯比海浪在北极的海洋循环中仍然扮演着核心角色吗？海洋如何应对北极海浪附近的风变化，而罗斯比波浪将不存在或停滞？涡流在潜在的涡度平衡中起什么作用？如果没有西海边界，海洋如何旋转到准平衡状态？风或热盐因子是否占主导地位并塑造北极的海洋循环？为什么大西洋水渗透到北极海洋？它是去北极替换被风力强迫的地表水，以脱离北极（风驱动理论），还是为了满足盐和热平衡（热盐水理论）？在过去的世纪中，基于亚热带和热带陀螺仪（例如Gulf流系统）开发了一种公认的海洋循环理论。该理论所基于的假设的有效性在北极海洋中值得怀疑。这项研究将增强我们对控制北极海洋循环的基本物理学的理解，以及我们预测循环模式变化的能力，这些变化可能是由于强迫变化而导致的，因此我们可以预测北极海洋中材料漂移的能力。