Dynamics of the Arctic Ocean Boundary Current: A Numerical Modeling Study of Key Locations

北冰洋边界流动力学：关键地点的数值模拟研究

• 批准号: 0352628
• 负责人: Peter Winsor
• 金额: --
• 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: 2004
• 资助国家: 美国
• 起止时间: 2004-03-15 至 2008-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0352628&HistoricalAwards=false
• 关键词: Dynamics; Arctic; Ocean; Boundary; Current

The Arctic Ocean Boundary Current (AOBC) is a relatively narrow current that flows mainly along the upper continental slope around much of the Arctic Ocean, serving as the major pathway by which water properties, such as heat, salt, contaminants, and tracers are distributed around the Arctic perimeter and delivered to the intermediate depths of the deep basins. The AOBC originates in the Greenland-Norwegian Sea, where relatively warm Atlantic waters flow into the Arctic via two branches, one through Fram Strait and one across the Barents Sea. Along its path, the AOBC encounters regions of complex bathymetry, where the current is altered, redirected and partially mixed into the deep basins. Funds are provided to investigate the fundamental dynamics of the AOBC at three key locations: St. Anna Trough, the Lomonosov Ridge, and the Mendeleyev Ridge/Chukchi Borderland. A high-resolution, three-dimensional, primitive-equation, numerical model will be used in both idealized and realistic configurations to understand the details of the adjustment of the AOBC to the bathymetry. Existing observations will be used both to provide realistic inflow conditions and to compare with the numerical results. The dynamics of these key locations are poorly understood, and large-scale pan-Arctic models do not resolve their details, so the time is ripe for such a regional process study

北冰洋边界流（Arctic Ocean Boundary Current， AOBC）是一种相对狭窄的洋流，主要沿着北冰洋周围的大陆上斜坡流动，是水的性质（如热、盐、污染物和示踪剂）在北极周边分布并传递到深盆地的中间深度的主要途径。AOBC起源于格陵兰-挪威海，相对温暖的大西洋海水通过两条支流流入北极，一条通过弗拉姆海峡，另一条穿过巴伦支海。沿着它的路径，AOBC遇到了复杂的水深测量区域，在那里电流被改变，重新定向并部分混合到深盆地中。提供资金在三个关键地点调查AOBC的基本动态：圣安娜海槽、罗蒙诺索夫海脊和门捷列夫海脊/楚科奇边境。一个高分辨率，三维，原始方程，数值模型将在理想和现实配置中使用，以了解AOBC对水深的调整细节。现有的观测结果将用于提供实际的入流条件，并与数值结果进行比较。人们对这些关键地点的动态知之甚少，大规模的泛北极模式无法解决它们的细节，因此进行这种区域过程研究的时机已经成熟