The Northwest Corner: Its Structure and Relation to the Subpolar Front

西北角：其结构及其与副极锋的关系

• 批准号: 0221073
• 负责人: H. Thomas Rossby
• 金额: $ 9.83万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0221073&HistoricalAwards=false
• 关键词: Northwest; Corner; Its; Structure; Relation; Northwest; Corner; Its; Structure; Relation

0221073 RossbyFunds are requested to analyze a large body of recently collected data from the Northwest Corner (NWC) of the Atlantic Ocean. The PI will characterize the structure of the region as completely as possible. He will construct mass, kinetic energy, and vorticity budgets, and will assess the spatial and temporal stability of the NWC. He anticipates that significant temporal dependence of the flow structure occurs as the NWC sheds potential energy, which accumulates either as rings or subducting eddies. He will explore two explanations for the broadening of the flow as it leaves the NWC - control by the Mid-Atlantic Ridge structure and competition between the zonal flow of the Subpolar Front and the meridional recirculation of waters leaving the NWC. The PI suggests that the two fronts observed within the Subpolar Frontal region reflect, through westward Rossby wave propagation, the two fracture zones of the Mid-Atlantic Ridge through which the Subpolar Front waters flow. Available data is from Eulerian moorings, Lagrangian floats, hydrographic surveys, acoustic Doppler current profiler surveys, and satellite altimetry. Some rotating table experiments will be performed.

0221073 RossbyFunds要求分析大西洋西北角（NWC）最近收集的大量数据。 PI将尽可能完全表征该区域的结构。 他将建立质量，动能和涡度预算，并将评估NWC的空间和时间稳定性。 他预计，随着NWC脱离势能，流动结构的显着时间依赖性会发生，这会积聚为环或俯冲涡流。 他将探索两种解释，以扩大流动，因为它离开了NWC - 由中大西洋山脊结构以及亚极前线的纬向流与离开NWC的水的子午循环之间的竞争。 PI表明，在亚极额叶区域内观察到的两个前部通过向西的罗斯比波传播反映了中大西洋山脊的两个断裂区域，亚极前水通过该区域的流动。 可用的数据来自Eulerian系泊设备，Lagrangian Floats，水文测量，声音多普勒电流剖面调查和卫星高度计。将进行一些旋转表实验。