A Study of Warm Core Ring - Shelf/Slope Interaction from the Oleander Project

夹竹桃项目的暖芯环-陆架/斜坡相互作用研究

• 批准号: 0425413
• 负责人: Dong-Ping Wang
• 金额: --
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-01 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0425413&HistoricalAwards=false
• 关键词: Study; Warm; Core; Ring; Shelf

0425413Intellectual merit: The Oleander project was conceived primarily to establish a long-term monitoring of the Gulf Stream's pole ward transport of mass and heat. Since October of 1992, the container ship, the MV Oleander, has been collecting ADCP observations on an almost continuous basis as the ship makes its weekly trips between New York and Bermuda. Over the last nine years (1993-2001) a total of 554 useful shelf/slope transects have been obtained, as well as a complete analysis of detiding, which has offered new insights about the Mid-Atlantic Bight shelf/slope circulation. But, perhaps what has been even more revealing from the Oleander transects are the observations which have indicated that the warm core rings observed over the transit area have sustained much influence on the shelf/slope. Nearly one-half of the transects were influenced by strong easterly currents associated with warm core rings, suggesting that the warm core rings most likely dominate the shelf-slope water exchange. Therefore, it is timely to complete a study of the shelf/slope circulation that also considers the impact of warm core rings. In this project, researchers from the State University of New York at Stony Brooks will continue the present data analysis effort of the Oleander project, but shift the emphasis toward interpretation rather than quality assurance. Specifically, the team of scientists will combine the Oleander observations with satellite and other complimentary data, to investigate the interaction of the Gulf Stream warm core rings with the Mid-Atlantic Bight shelf and slope. Each ring-induced small-scale feature along the transit line will be isolated and their generation mechanisms examined, so that the researchers can: 1) define the velocity structures of small-scale cyclones, anticyclones, and jets (streamers and shelfbreak jet) with respect to the swirling motion of the warm rings; 2) determine whether or not there are significantly different types of ring-slope interactions in relation to the ring size, strength, and proximity to the shelfbreak; 3) determine the seasonal dependence and possible interannual variability (in relation to Gulf Stream path variations) of the ring-slope interaction. And 4) Examine the mechanisms of generation of cyclones, anticyclones, and streamers.Broader Impacts: The mean and seasonal shelf/slope currents are determined for the period of no visible influence of warm core rings. It is shown that the equatorward transport extends well beyond the shelf break and that the upper slope currents are a major source of the shelf water transport.. Since the shelf/slope currents are much more energetic during the ring period, it is likely that warm core rings may dominate the exchange between shelf and slope. At present, very little is known about the ring-slope interaction. The proposed study will shed insights about this important but long ignored process. The implication can be enormous, leading to a new understanding of the material (water, salt, carbon cycle, etc.) exchange across the continental margin. This project also includes training of a Ph.D. student. The principal investigator is committed to training of the next generation leaders of diverse background (and professional interests). He also is involved with the university's new undergraduate environmental studies program and plans to engage several undergraduate students for honor credits in this project, in the area of processing and analysis of satellite imagery.

0425413智力价值：夹竹桃项目的设想主要是建立一个长期监测墨西哥湾流的质量和热量的极向运输。 自1992年10月以来，集装箱船“夹竹桃”号在每周往返于纽约和百慕大之间的途中，几乎连续不断地收集ADCP观测数据。 在过去的九年（1993-2001年）中，共获得了554个有用的陆架/斜坡样带，以及完整的潮汐分析，这提供了新的见解中大西洋湾陆架/斜坡环流。 但是，也许夹竹桃样带更能说明问题的是，观察结果表明，在过境区观察到的暖核环对大陆架/斜坡产生了很大的影响。 近一半的样带的影响与温暖的核心环强东风，这表明温暖的核心环最有可能占主导地位的陆棚斜坡水交换。 因此，现在是时候完成一项研究的大陆架/斜坡环流，也考虑到温暖的核心环的影响。 在这个项目中，来自布鲁克斯的纽约州立大学的研究人员将继续进行夹竹桃项目目前的数据分析工作，但将重点转向解释，而不是质量保证。 具体而言，科学家小组将联合收割机将夹竹桃观测与卫星和其他补充数据相结合，以调查墨西哥湾流暖核环与大西洋中部海湾陆架和斜坡的相互作用。 每一个环引起的小尺度特征沿着过境线将被隔离，并检查其生成机制，以便研究人员可以：1）定义小尺度气旋，反气旋和喷流的速度结构（拖缆和陆架断裂喷流）与暖环的涡旋运动; 2）确定是否存在与环的大小、强度和与架坡的接近度有关的显著不同类型的环-斜坡相互作用; 3）确定环坡相互作用的季节依赖性和可能的年际变化（与墨西哥湾流路径变化有关）。和4）检查的气旋，反气旋和流光的产生机制。更广泛的影响：平均和季节性的陆架/斜坡电流确定的期间，没有明显的影响的温暖的核心环。结果表明，向赤道输送延伸远远超出了陆架坡折，上斜坡流是陆架水输送的主要来源。由于陆架/斜坡流在环期间更有活力，因此暖核环可能主导陆架和斜坡之间的交换。目前，人们对环-坡相互作用知之甚少。这项拟议中的研究将揭示这一重要但长期被忽视的过程。其意义可能是巨大的，导致对材料（水，盐，碳循环等）的新理解。大陆边缘的交流。该项目还包括培养一名博士。学生. 首席研究员致力于培养不同背景（和专业兴趣）的下一代领导者。他还参与了该大学新的本科生环境研究项目，并计划在卫星图像处理和分析领域让几名本科生在该项目中获得荣誉学分。