Lagrangian Study of the Iceland-Faroe Front. Part II: Analysis and Synthesis

冰岛-法罗锋线的拉格朗日研究。

• 批准号: 0623210
• 负责人: H. Thomas Rossby
• 金额: $ 15.56万
• 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: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0623210&HistoricalAwards=false
• 关键词: Lagrangian; Study; Iceland; Faroe; Front.

ABSTRACTOCE-0623210Intellectual Merit: A Lagrangian study of the inflow of shallow and warm North Atlantic water across the Iceland-Faroe Ridge, along the Iceland-Faroe Front (IFF), and into the Norwegian Sea has previously been funded as a cooperative effort between the University of Rhode Island (URI) and the Institute of Marine Research (IMR) in Bergen, Norway. A major objective of that study was to understand the basic features of the IFF: its mean and time varying structure, from which side of the Iceland Basin its waters come, and where and how they continue downstream. Sixty floats from URI were deployed at 200 dbar to the south of the Iceland-Faroe Ridge to examine the shallow pathways of warm North Atlantic waters across the Ridge and beyond into the Norwegian Sea, and 30 floats from IMR were deployed at 800 dbar just north of the Ridge to focus on the flow of Arctic intermediate waters. These floats will have completed their mission and surfaced by the spring of 2006, and preliminary processing is expected to be complete by the end of that summer. The primary purpose of this analysis and synthesis project is to continue the original scientific objectives of the field program, but also extend those ideas to incorporate new ideas and collaborations. The RAFOS float data will be used to map the pathways, develop quantitative estimates of the transport across the Iceland-Faroes Ridge, the eddy variability in the IFF, and the exchanges and mixing with the Norwegian Sea Water to its north, and a description of the bifurcation of the IFF into the northern and southern Faroe Current. As is well-known, floats can be very effective at identifying pathways of transport and mixing, while the corresponding velocities and their variability in and along the front give information on the front's structure and downstream evolution. Broader Impacts: The analysis of these observations will enhance our understanding of the penultimate link in the northward transport of warm water in the thermohaline circulation (the final step being deep convection in the Nordic Seas). The dynamics of the ocean that controls the pathways and the transport of warm water over the Iceland- Faroes Ridge also serve to control the climate over northern Europe. The results of the RAFOS float analysis will be shared closely with collaborators, both observationalists and numerical modelers, in Norway and Sweden so that a coherent and comprehensive picture of the both the shallow and intermediate circulation can be made. All the data and results from this project will be made available to the community through submissions to data centers, presentations at national and international meetings, and publication of technical reports and scientific papers.

Abstractoce-0623210 Intellectual功绩：一项Lagrangian研究，沿着冰岛 - 弗罗（IFF）（IFF）以及以前是在挪威海洋上以及以前是作为合作努力资助的冰岛 - 弗罗山脊上浅层和温暖的北大西洋水的流入的研究罗德岛大学（URI）和挪威卑尔根的海洋研究所（IMR）。该研究的一个主要目的是了解IFF的基本特征：其平均值和时间变化的结构，其水域的哪一侧以及它们在下游的何处以及如何继续下游。从URI的六十个浮子在冰岛 - 弗罗山脊南部的200 dbar部署，以检查横跨山脊上的温暖北大西洋水域的浅道路，到达挪威海，IMR的30个浮子在北部部署了800 dbar。山脊的集中在北极中间水域的流动上。这些浮子将完成任务并在2006年春季之前浮出水面，预计在那个夏天结束时将完成初步处理。该分析和合成项目的主要目的是继续实地计划的原始科学目标，但也将这些想法扩展到结合新的想法和协作。 RAFOS浮点数据将用于绘制途径，对跨冰岛山脊的运输进行定量估计，IFF中的涡流变异性以及交流和与挪威海水的交流和混合，以及描述的描述IFF的分叉进入北方和南方南部的电流。众所周知，浮子在识别运输和混合途径方面非常有效，而相应的速度及其在正面的速度及其变异性可提供有关前部结构和下游演变的信息。更广泛的影响：对这些观察结果的分析将增强我们对热盐循环中温水向北运输中倒数第二个联系的理解（最后一步是北欧海洋中的深对流）。控制冰岛山脊上的道路和温水运输的海洋动态也有助于控制北欧的气候。 Rafos Float分析的结果将与挪威和瑞典的观察家和数字建模者的合作者紧密共享，以便可以对浅层和中间循环的连贯和全面的了解。该项目的所有数据和结果将通过向数据中心提交，国家和国际会议的演讲以及技术报告和科学论文的发布提供给社区。