Collaborative Research: North Atlantic Dynamics - Developing and Exploiting a Long-Term Cape Hatteras Gulf Stream Time Series

合作研究：北大西洋动力学 - 开发和利用长期哈特拉斯角湾流时间序列

• 批准号: 2123316
• 负责人: Harvey Seim
• 金额: $ 64.41万
• 依托单位: University of North Carolina at Chapel Hill
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-10-01 至 2024-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2123316&HistoricalAwards=false
• 关键词: Collaborative; Research; North; Atlantic; Dynamics

This project will use a number of existing data sources from the ocean and from the atmosphere to determine variations of the Gulf Stream near Cape Hatteras from 2004 to the present time. The Gulf Stream variations to be studied range in periodicity from a day or two to interannual. Possible causes of these variations will be determined utilizing measurements from the ocean and the atmosphere. This characterization of the Gulf Stream will provide a description of how the Gulf Stream affects and is affected by ocean and atmospheric circulations in the North Atlantic. The project will explore potential influences from climate variability as well as explore the feasibility of harnessing energy from the Gulf Stream off Cape Hatteras. The project will support one post-doctoral scholar, two graduate students and one undergraduate student in the pursuit of various project objectives. The study will investigate the nature and causes of variability of the Gulf Stream near Cape Hatteras and explore how the Gulf Stream affects and is affected by oceanic and atmospheric processes in the North Atlantic. This will be done by reprocessing and analyzing HF radar surface current measurements and comparing these findings with ancillary data to test hypotheses about controls on and consequences of Gulf Stream variability. Analyses will consist of examining the position, path, structure, and location of separation of the Gulf Stream at temporal scales ranging from event-scale to interannual. The HF radar data will be compared to (i) in-situ and altimetry data, (ii) Oleander data, (iii) data from Line W of the Deep Western Boundary Current, (iv) data from the RAPID line, (v) cable data of transport at Florida Strait, and (vi) counts and trajectories of cold and warm core rings. Gulf Stream properties will also be compared to atmospheric forcing variability such as the NAO index, Jet Stream position, local wind stress, and basin-scale wind-stress curl. The project will derive Gulf Stream characteristics from observations collected since 2004 and result in a database updated in near real-time. Measurements with HF radar will continue after this project expires. Also, the project will provide information about the feasibility of harnessing energy from the Gulf Stream. The project will support one post-doctoral scholar, 2 graduate students and 1 undergraduate student.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目将利用来自海洋和大气的若干现有数据来源，以确定2004年至今哈特拉斯角附近的墨西哥湾流的变化。需要研究的墨西哥湾流变化周期从一天到两天到年际不等。这些变化的可能原因将通过海洋和大气的测量来确定。墨西哥湾流的这一特征将描述墨西哥湾流如何影响北大西洋的海洋和大气环流，并受其影响。该项目将探索气候变化的潜在影响，并探索利用哈特拉斯角附近墨西哥湾流的能源的可行性。该项目将支持一名博士后学者、两名研究生和一名本科生追求各种项目目标。这项研究将调查哈特拉斯角附近墨西哥湾流变化的性质和原因，并探讨墨西哥湾流如何影响北大西洋的海洋和大气过程并受其影响。这将通过重新处理和分析高频雷达表面海流测量，并将这些结果与辅助数据进行比较，以检验关于墨西哥湾流可变性的控制和后果的假设。分析将包括在从事件尺度到年际尺度的时间尺度上检查墨西哥湾流分离的位置、路径、结构和位置。高频雷达数据将与(I)现场和测高数据，(Ii)夹竹桃数据，(Iii)深西部边界流的W线数据，(Iv)快速线的数据，(V)佛罗里达海峡传输的电缆数据，以及(Vi)冷核环和暖核环的计数和轨迹进行比较。墨西哥湾流的特性也将与大气强迫变化进行比较，例如NAO指数、急流位置、局地风应力和盆地尺度的风应力旋度。该项目将从2004年以来收集的观测资料中得出墨西哥湾流的特征，并产生一个近乎实时更新的数据库。在该项目到期后，将继续使用高频雷达进行测量。此外，该项目还将提供有关利用墨西哥湾流能源的可行性的信息。该项目将支持一名博士后学者、两名研究生和一名本科生。该奖项反映了NSF的法定使命，并通过使用基金会的学术价值和更广泛的影响审查标准进行评估，被认为值得支持。