A Study of the Extension of the North Atlantic Current and Pathways of Exchange: Phase II - Data Analysis

北大西洋洋流延伸和交换路径的研究：第二阶段 - 数据分析

• 批准号: 9906775
• 负责人: H. Thomas Rossby
• 金额: $ 42.4万
• 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: 1999
• 资助国家: 美国
• 起止时间: 1999-11-01 至 2002-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9906775&HistoricalAwards=false
• 关键词: Study; Extension; North; Atlantic; Current

9906775RossbyRaw data obtained from RAFOS floats, deployed as part of the Atlantic Circulation and Climate Experiment, will be processed, quality controlled, and then analyzed. The processed data will be used: (a) to map out the paths taken by the waters of the North Atlantic Current after it passes the Grand Banks, (b) to identify the locations of, and processes responsible for, exchange across the North Atlantic Current, (c) to map out the dissolved oxygen field on the density surface followed by the floats, and (d) to obtain statistics of particle displacements in the region. In addition, a short cruise will be made to recover the submerged sound sources used by the floats for navigation. The scientific tasks are designed to illuminate the way in which the waters of the subpolar and subtropical North Atlantic are exchanged and will contribute to developing an understanding of the meridional transport of heat in that ocean. 9908091Padman/EgbertIn this work, sub-surface current meter data will be assimilated into two and three-dimensional numerical models of tidal flows in the Weddell Sea. Inverse methods will be used to guide improvements of parameterizations of the effects of diurnal vorticity waves and of friction in the bottom boundary layer. Since the Weddell Sea is close to the critical latitudes for the main semi-diurnal tide and has weak stratification, the bottom boundary layer is thick and the tidal flow is relatively barotropic, simplifying the modeling task and allowing a better characterization of the flow by the current meters.

从Rafos Floats获得的9906775ROSSBYRAW数据将作为大西洋循环和气候实验的一部分部署，将进行处理，控制质量，然后进行分析。 将使用处理后的数据：（a）绘制出北大西洋电流通过大银行后所采取的路径，（b）以确定北大西洋电流的交换的位置和过程，（c）绘制溶解的氧气表面上的溶解的氧气表面上的密度表面，并在浮子和d）中占据了粒子的统计量，以占地列为粒子的统计。 此外，将进行简短的巡游，以恢复浮子用于导航的淹没声源。 科学任务旨在阐明北大西洋亚电爱量和亚热带亚热带的水域的方式，并将有助于发展对该海洋中热的子午线运输的理解。 9908091 PADMAN/EGBETRIN这项工作，次面电流仪表数据将被融合为Weddell Sea中潮汐流的两维数值模型。 逆方法将用于指导昼夜涡度波和底部边界层摩擦影响的参数化的改进。 由于Weddell Sea接近主要半局部潮汐的临界纬度，并且分层较弱，因此底部边界层厚，潮汐流相对偏射，从而简化了建模任务并允许通过当前电表更好地表征流动。