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

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 被要求分析最近从大西洋西北角 (NWC) 收集的大量数据。 PI 将尽可能完整地描述该地区的结构。 他将构建质量、动能和涡度预算，并评估 NWC 的空间和时间稳定性。 他预计，当 NWC 释放势能时，流动结构会出现显着的时间依赖性，势能会以环或俯冲涡的形式累积。 他将探讨离开西北碳海流时水流变宽的两种解释：大西洋中脊结构的控制以及副极地锋的纬向流与离开西北碳海的经向再循环之间的竞争。 PI表明，在副极锋区域内观察到的两个锋面通过向西的罗斯贝波传播反映了副极锋水流经的大西洋中脊的两个断裂带。 可用数据来自欧拉系泊装置、拉格朗日浮标、水文测量、声学多普勒电流剖面仪测量和卫星测高。将进行一些旋转台实验。