Identifying Drivers of the Meridional Overturning Circulation from Observations in Drake Passage
从德雷克海峡的观测中识别经向翻转环流的驱动因素
基本信息
- 批准号:1755529
- 负责人:
- 金额:$ 54.91万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-05-01 至 2023-04-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The Antarctic Circumpolar Current (ACC) in the Southern Ocean links all the major oceans of the world. The ACC is therefore very important for the transferring and exchanging of heat, freshwater and other properties like carbon and nutrients that impact the marine ecosystem. The Southern Ocean is particularly sensitive to climate variability, responding to winds that have increased and shifted over the past several decades and a significant warming in the core of the ACC. Yet we still have little understanding about what controls the overall strength of the current as it flows around the Southern Ocean or how the flow and the properties it carries change with depth in the ocean. The proposed work aims to study the processes that might control the changes in strength and depth distribution over a range of temporal and spatial scales using a 20-year time series of currents, temperature and salt in the Drake Passage sector of the Southern Ocean. This work will improve our predictions of how this critical region will respond to future climate change. Given the sparsity of data, the Southern Ocean's role in the climate system in relationship to the impact of global warming and the uptake of carbon dioxide are generally examined using global climate models. Eddy effects must be parameterized in coarse-resolution models, and the parameterizations are generally tested on a very limited observational database. The fine-scale observations in Drake Passage allow for an evaluation of these parameterizations and provide clues for identifying model errors or missing physics so as to build confidence in the detailed model representation of processes and dynamics within the ACC system. The project increases the participation of underrepresented groups in science and technology. It promotes training and learning through the involvement of a graduate student.The research aims to understand the physical processes that contribute to the circulation in the Southern Ocean, focusing on three central research themes within Drake Passage: (1) Mixing: Characterize the internal wave field and infer mixing from velocity, temperature and salinity observations to understand what determines the vertical and horizontal distribution of mixing; (2) Energy and transport: Determine the mean and time-varying transport of the ACC in the upper 1000 m and determine how the variability relates to changes in wind forcing and presence of eddies; and (3) Property stirring: Understand the eddy energy distribution and its relationship to topographic features, ACC fronts, wind and buoyancy forcing. The proposed analysis will take advantage of underway shipboard measurements of temperature, salinity and velocity profiles that have been routinely collected year-round from the United States Antarctic Supply research vessels in the Drake Passage over the past two decades. Contemporaneous measurements at similar high-resolution time and space scales from the same platform offer significant benefit for exploring the statistical characteristics, features, mechanisms and impacts of the processes that drive the Southern Ocean circulation. Additional measurements from Argo floats and satellite wind and sea surface height data will provide regional context to help interpret the shipboard time series.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.
南大洋的南极绕极流(ACC)连接着世界上所有主要的海洋。因此,ACC对于热量,淡水和其他影响海洋生态系统的碳和营养物质的传输和交换非常重要。南大洋对气候变化特别敏感,对过去几十年来风的增加和变化以及ACC核心的显着变暖做出反应。然而,我们仍然不了解是什么控制了南大洋周围流动的总体强度,或者它所携带的流量和属性如何随着海洋深度而变化。拟议工作的目的是利用南大洋德雷克海峡部分的海流、温度和盐份的20年时间序列,研究可能在一系列时间和空间尺度上控制强度和深度分布变化的过程。这项工作将改善我们对这一关键地区将如何应对未来气候变化的预测。由于数据稀少,南大洋在气候系统中与全球变暖影响和二氧化碳吸收有关的作用一般使用全球气候模型来研究。涡动效应必须在粗分辨率模式中参数化,并且参数化通常在非常有限的观测数据库上进行测试。在德雷克通道的细尺度观测允许这些参数化的评价,并提供线索,识别模型错误或丢失的物理,以便建立在ACC系统内的过程和动态的详细模型表示的信心。该项目增加了代表性不足的群体对科学和技术的参与。该研究旨在了解影响南大洋环流的物理过程,重点关注德雷克海峡内的三个中心研究主题:(1)混合:描述内波场的特征,并根据速度、温度和盐度观测结果推断混合,以了解是什么决定混合的垂直和水平分布;(2)能量和输送:确定高空1000 m ACC的平均和时变输送,并确定变异性如何与风强迫和涡旋存在的变化相关;和(3)性质搅拌:了解涡旋能量分布及其与地形特征、ACC锋、风和浮力强迫的关系。拟议的分析将利用正在进行的船上温度、盐度和流速剖面测量,这些测量是过去20年来从德雷克海峡的美国南极供应研究船上全年例行收集的。在同一平台上以类似的高分辨率时间和空间尺度进行同期测量,对于探索驱动南大洋环流的过程的统计特征、特点、机制和影响有很大好处。来自Argo浮标和卫星风和海面高度数据的额外测量将提供区域背景,以帮助解释船上时间序列。该奖项反映了NSF的法定使命,并被认为值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估来支持。
项目成果
期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Controls on Wintertime Ventilation in Southern Drake Passage
南德雷克航道冬季通风控制
- DOI:10.1029/2022gl102550
- 发表时间:2023
- 期刊:
- 影响因子:5.2
- 作者:Dove, Lilian A.;Viglione, Giuliana A.;Thompson, Andrew F.;Flexas, M. Mar;Cason, Taylor R.;Sprintall, Janet
- 通讯作者:Sprintall, Janet
Turbulent Mixing and Lee‐Wave Radiation in Drake Passage: Sensitivity to Topography
德雷克海峡中的湍流混合和李氏波辐射:对地形的敏感性
- DOI:10.1029/2021jc018103
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Gutierrez‐Villanueva, Manuel O.;Chereskin, Teresa K.;Sprintall, Janet;Goff, John A.
- 通讯作者:Goff, John A.
Upper-Ocean Eddy Heat Flux across the Antarctic Circumpolar Current in Drake Passage from Observations: Time-Mean and Seasonal Variability
- DOI:10.1175/jpo-d-19-0266.1
- 发表时间:2020-09-01
- 期刊:
- 影响因子:3.5
- 作者:Gutierrez-Villanueva, Manuel O.;Chereskin, Teresa K.;Sprintall, Janet
- 通讯作者:Sprintall, Janet
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Janet Sprintall其他文献
Seasonality of the Somali Current/Undercurrent system
索马里洋流/暗流系统的季节性
- DOI:
10.1016/j.dsr2.2021.104953 - 发表时间:
2021-08 - 期刊:
- 影响因子:0
- 作者:
Nan Zang;Janet Sprintall;Rémi Ienny;Fan Wang - 通讯作者:
Fan Wang
Energetic overturning flows, dynamic interocean exchanges, and ocean warming observed in the South Atlantic
在南大西洋观测到的充满活力的翻转流、动态的海洋内部交换和海洋变暖
- DOI:
10.1038/s43247-022-00644-x - 发表时间:
2023-01-19 - 期刊:
- 影响因子:8.900
- 作者:
María Paz Chidichimo;Renellys C. Perez;Sabrina Speich;Marion Kersalé;Janet Sprintall;Shenfu Dong;Tarron Lamont;Olga T. Sato;Teresa K. Chereskin;Rebecca Hummels;Claudia Schmid - 通讯作者:
Claudia Schmid
A stronger Indonesian Throughflow Related to Enhanced Regional Rainfall
印度尼西亚流量增加与区域降雨量增加有关
- DOI:
- 发表时间:
2017 - 期刊:
- 影响因子:0
- 作者:
Shijian Hu;Janet Sprintall - 通讯作者:
Janet Sprintall
Subsurface melting of a free-floating Antarctic iceberg
- DOI:
10.1016/j.dsr2.2010.11.009 - 发表时间:
2011-06-01 - 期刊:
- 影响因子:
- 作者:
Gordon R. Stephenson;Janet Sprintall;Sarah T. Gille;Maria Vernet;John J. Helly;Ronald S. Kaufmann - 通讯作者:
Ronald S. Kaufmann
The intermediate water in the Philippine Sea
菲律宾海的中间水
- DOI:
10.1007/s00343-020-0035-4 - 发表时间:
2020-05 - 期刊:
- 影响因子:1.6
- 作者:
Nan Zang;Fan Wang;Janet Sprintall - 通讯作者:
Janet Sprintall
Janet Sprintall的其他文献
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{{ truncateString('Janet Sprintall', 18)}}的其他基金
Ocean Gateways and Choke Points: Progress and Challenges
海洋门户和瓶颈:进展和挑战
- 批准号:
2006148 - 财政年份:2020
- 资助金额:
$ 54.91万 - 项目类别:
Standard Grant
Collaborative Research: Measurements and Modelling of the Indonesian Throughflow International Experiment (MINTIE)
合作研究:印度尼西亚通流国际实验(MINTIE)的测量和建模
- 批准号:
1851316 - 财政年份:2019
- 资助金额:
$ 54.91万 - 项目类别:
Continuing Grant
The Equatorial Line Observations Campaign: Physical Oceanography within the Maritime Continent
赤道线观测活动:海洋大陆内的物理海洋学
- 批准号:
1736285 - 财政年份:2017
- 资助金额:
$ 54.91万 - 项目类别:
Standard Grant
Collaborative Research: Boundary Current Control of Upwelling in Southern Drake Passage: Whither Weddies?
合作研究:南德雷克海峡上升流的边界流控制:婚姻何去何从?
- 批准号:
1246160 - 财政年份:2013
- 资助金额:
$ 54.91万 - 项目类别:
Standard Grant
Spatial and Temporal Patterns of Upper Ocean Variability from the Drake Passage High-Resolution XBT/XCTD Observations
德雷克海峡高分辨率 XBT/XCTD 观测的上层海洋变化的时空模式
- 批准号:
0943818 - 财政年份:2010
- 资助金额:
$ 54.91万 - 项目类别:
Standard Grant
MoorSPICE: Moorings for the Southwest Pacific Circulation Experiment
MoorSPICE:西南太平洋环流实验的系泊装置
- 批准号:
1029487 - 财政年份:2010
- 资助金额:
$ 54.91万 - 项目类别:
Continuing Grant
Collaborative Research: Sampling the Ocean - Sea Ice Interaction in the Pacific Center of the Antarctic Dipole
合作研究:对南极偶极子太平洋中心的海洋-海冰相互作用进行采样
- 批准号:
0739522 - 财政年份:2008
- 资助金额:
$ 54.91万 - 项目类别:
Continuing Grant
Collaborative Research: Analysis of the INSTANT Observations of the Indonesian Throughflow
合作研究:印度尼西亚通流的即时观测分析
- 批准号:
0725476 - 财政年份:2007
- 资助金额:
$ 54.91万 - 项目类别:
Standard Grant
The Surface Layer Contribution to the Indonesian Throughflow
表层对印度尼西亚通流的贡献
- 批准号:
0621601 - 财政年份:2006
- 资助金额:
$ 54.91万 - 项目类别:
Standard Grant
Renewal of the Drake Passage High Density XBT/XCTD Program
更新德雷克海峡高密度 XBT/XCTD 计划
- 批准号:
0337998 - 财政年份:2004
- 资助金额:
$ 54.91万 - 项目类别:
Continuing Grant
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