Collaborative Research: The Oleander Project: High-resolution observations of the dynamic ocean between New Jersey and Bermuda

合作研究：夹竹桃项目：新泽西州和百慕大之间动态海洋的高分辨率观测

• 批准号: 1536851
• 负责人: H. Thomas Rossby
• 金额: $ 39.15万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-15 至 2023-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1536851&HistoricalAwards=false
• 关键词: Collaborative; Research; Oleander; Project; resolution

This project will extend for five years and enhance the multi-decadal oceanographic observations from the MV Oleander, a container vessel that on a weekly schedule crosses four distinct regions, namely the continental shelf, Slope Sea, Gulf Stream and Sargasso Sea on its route between New Jersey and Bermuda. The enhancements include an acoustic Doppler current profiler (ADCP) pair that will provide direct measurement of the currents through the base of the thermocline to about 1200 m depth in the open ocean on the one hand, and high vertical resolution profiling of the upper ocean on the other. The former will enable research into the full upper ocean structure of the Gulf Stream, the mesoscale eddy field, and the highly variable Sargasso Sea, all of which are important components in the large scale ocean circulation including the climatically important meridional overturning circulation (MOC). The latter will greatly improve coverage on the continental shelf, shelfbreak front and resolution of the mixed layer seasonal thermocline structure.The Oleander track is uniquely situated as it enables in situ measurements across the shelf and slope, through the southernmost extension of the North Atlantic subpolar gyre, and into the subtropical gyre. The beauty of these ADCP snapshots is that they tell us what the ocean is doing over a wide range of scales. Ensemble averaging these leads to robust data sets that will contribute to continued and deeper investigations into (1) seasonal, and interannual to decadal variability on the mid-Atlantic Bight shelf, (2) dynamics controlling the communication between the shelf and open ocean, (3) connectivity along western boundaries in the MOC at different latitudes, and (4) interannual to decadal variability in the Gulf Stream position, strength and the structure of the subpolar gyre, and the recirculation in the Sargasso Sea. In addition, the high horizontal resolution of surface salinity, temperature and velocity afforded by individual tracks will enable continued investigation into sub-mesoscale processes. A replacement ship is expected to enter service in the second or third year of the project. With the installation of two new ADCPs on the new hull, one for improved shelf-slope operation and one to profile to 1200 m depths, the Oleander project will greatly increase its observational footprint in the northwest Atlantic. All data will be available to the public as soon as they are processed and quality-controlled. The expansion of the University of Hawaii UNOLS-wide ADCP data acquisition system, UHDAS to include volunteer observing ships will allow for real time data streams from not only the Oleander, but also other such ADCP-equipped vessels in operation in the North Atlantic.

该项目将持续五年，并加强 MV Oleander 号的数十年海洋学观测，这艘集装箱船每周都会穿越四个不同的区域，即大陆架、斜坡海、墨西哥湾流和马尾藻海。新泽西州和百慕大。增强功能包括声学多普勒海流剖面仪 (ADCP) 对，一方面可直接测量通过温跃层底部至公海约 1200 米深度的海流，另一方面可对上层海洋进行高垂直分辨率剖面分析。另一个。前者将能够研究墨西哥湾流的完整上层海洋结构、中尺度涡流场和高度变化的马尾藻海，所有这些都是大尺度海洋环流的重要组成部分，包括气候上重要的经向翻转环流（MOC） 。后者将极大地提高大陆架的覆盖范围、陆架断裂前沿以及混合层季节性温跃层结构的分辨率。夹竹桃轨道地理位置独特，因为它能够通过北大西洋副极地最南端的延伸，对大陆架和斜坡进行原位测量环流，并进入副热带环流。这些 ADCP 快照的美妙之处在于它们告诉我们海洋在大范围内正在做什么。对这些数据进行平均可以得到可靠的数据集，这些数据集将有助于对以下方面进行持续和更深入的调查：(1) 大西洋中部湾陆架的季节性、年际至年代际变化，(2) 控制陆架和公海之间通信的动力学，( 3）沿 MOC 西部边界在不同纬度的连通性，以及（4）墨西哥湾流位置、强度和副极地环流结构的年际至年代际变化，以及马尾藻海。此外，各个轨迹提供的表面盐度、温度和速度的高水平分辨率将使人们能够继续研究亚介尺度过程。预计替换船将在项目的第二年或第三年投入使用。随着在新船体上安装两台新的 ADCP，一台用于改进陆架斜坡操作，一台用于 1200 m 深度的剖面测量，Oleander 项目将大大增加其在西北大西洋的观测足迹。所有数据在经过处理和质量控制后将立即向公众开放。夏威夷大学 UNOLS 范围内的 ADCP 数据采集系统 UHDAS 的扩展包括志愿观测船，不仅可以从夹竹桃号获取实时数据流，还可以从北大西洋运行的其他配备 ADCP 的船只获取实时数据流。