Internal Waves and Mixing above the South-West Indian Ridge

西南印度洋中脊上方的内波和混合

基本信息

项目摘要

The southwest Indian Ridge (SWIR) is a slow spreading jagged ridge that extends 7700 kilometers along the edge of the Antarctic and African plates. The SWIR is one of the largest areas that experiences open ocean energy loss due to barotropic tides and the generation of internal waves. Several major branches of sub-surface currents in the Western Indian Ocean flow over the SWIR and are subject to turbulent mixing which may have a significant effect on the circulation of all of the water masses that pass through this region. Recent evidence suggests that increased turbulent mixing due to internal waves exists along the entire length of the SWIR, however, scientists need a better understanding of the dynamical processes that produce elevated turbulence to determine the actual source of this turbulent influence. Oceanographers from Scripps Institute of Oceanography propose two probable origins for small vertical-scale internal waves along the SWIR, topographically scattering low-mode near-inertial waves that propagate from the Southern Ocean, and locally generated internal tides produced by barotropic tidal flow over rough bathymetry. The investigators of this project propose to study the magnitude, spatial structure, and causes of elevated mixing above the SWIR utilizing a collection of innovative instrumentation. Through the use of a series of numerical modeling experiments and a combination of shipboard Doppler sonar, a rapid profiling CTD, and McLane moored profilers, the principle investigators will obtain a high resolution time series of internal waves and mixing in several locations over the SWIR. This work is expected to make a significant contribution to understanding diapycnal mixing in the Indian Ocean basin and shed new light on the fundamental dynamics governing mixing in locations of rough topography worldwide, an important and relatively little studied topic physical oceanography. In addition to the primary scientific contributions, the proposed work will provide funding to support the development of two early-career scientists as well as education and training for graduate students to participate in both field work and data analysis.
西南印度洋脊(SWIR)是一个缓慢扩展的锯齿状山脊,沿着南极和非洲板块边缘延伸沿着7700公里。由于正压潮汐和内波的产生,SWIR是经历开放海洋能量损失的最大区域之一。西印度洋表层下海流的几个主要分支流经西南红外线,并受到湍流混合的影响,这可能对通过该区域的所有水团的循环产生重大影响。最近的证据表明,增加湍流混合由于内部波存在沿着整个长度的短波红外线,但是,科学家需要更好地了解的动态过程,产生升高的湍流,以确定这种湍流的影响的实际来源。斯克里普斯海洋学研究所的海洋学家提出了两个可能的起源小垂直尺度内波沿着SWIR,地形散射低模式近惯性波传播从南大洋,和本地产生的内潮汐产生的正压潮汐流粗糙水深。该项目的研究人员建议利用一系列创新的仪器来研究SWIR上方混合的幅度、空间结构和原因。通过使用一系列的数值模拟实验和组合的船载多普勒声纳,一个快速剖面CTD,和麦克莱恩系泊剖面仪,原则的调查人员将获得一个高分辨率的时间序列的内波和混合在几个位置在SWIR。这项工作预计将作出重大贡献,以了解在印度洋盆地的diapycnal混合,并揭示了新的光的基本动力学控制混合在世界各地的粗糙地形的位置,一个重要的和相对较少的研究课题物理海洋学。除了主要的科学贡献,拟议的工作将提供资金,以支持两个早期职业科学家的发展,以及教育和培训研究生参与实地工作和数据分析。

项目成果

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Jennifer MacKinnon其他文献

Mountain waves in the deep ocean
深海中的山波
  • DOI:
    10.1038/501321a
  • 发表时间:
    2013-09-18
  • 期刊:
  • 影响因子:
    48.500
  • 作者:
    Jennifer MacKinnon
  • 通讯作者:
    Jennifer MacKinnon

Jennifer MacKinnon的其他文献

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{{ truncateString('Jennifer MacKinnon', 18)}}的其他基金

NSFGEO-NERC: Collaborative Research: Energy transfer between submesoscale vortices and resonantly-forced inertial motions in the northern Gulf of Mexico
NSFGEO-NERC:合作研究:墨西哥湾北部亚中尺度涡旋和共振强迫惯性运动之间的能量转移
  • 批准号:
    1851201
  • 财政年份:
    2019
  • 资助金额:
    $ 87.32万
  • 项目类别:
    Continuing Grant
Submesoscale Instabilities and Turbulence Across Oceans: Connecting Theory and Observations
跨洋的亚尺度不稳定性和湍流:理论与观测的联系
  • 批准号:
    1736595
  • 财政年份:
    2017
  • 资助金额:
    $ 87.32万
  • 项目类别:
    Standard Grant
Workshop On Ocean Mixing: Recent results and future prospects from combining process studies, theory and numerical modeling approaches; Scripps Inst.; Oct.27-29, 2015
海洋混合研讨会:结合过程研究、理论和数值模拟方法的最新成果和未来前景;
  • 批准号:
    1555422
  • 财政年份:
    2015
  • 资助金额:
    $ 87.32万
  • 项目类别:
    Standard Grant
Interpreting Regional and Temporal Variability in Global Diapycnal Mixing Inferred from Argo Profiles
解释从 Argo 剖面推断的全球二重混合的区域和时间变化
  • 批准号:
    1259573
  • 财政年份:
    2013
  • 资助金额:
    $ 87.32万
  • 项目类别:
    Standard Grant
Collaborative Research: Systematic Direct Mixing Measurements within the Global Repeat Hydrography Program (SYSDMM)
合作研究:全球重复水文学计划 (SYSDMM) 内的系统直接混合测量
  • 批准号:
    1333714
  • 财政年份:
    2013
  • 资助金额:
    $ 87.32万
  • 项目类别:
    Standard Grant
Collaborative Research: Observing turbulent fluxes in the upper Arctic Ocean
合作研究:观测北冰洋上层的湍流
  • 批准号:
    1303791
  • 财政年份:
    2013
  • 资助金额:
    $ 87.32万
  • 项目类别:
    Standard Grant
Collaborative Research: Representing internal-wave driven mixing in global ocean models
合作研究:代表全球海洋模型中的内波驱动混合
  • 批准号:
    0968721
  • 财政年份:
    2010
  • 资助金额:
    $ 87.32万
  • 项目类别:
    Continuing Grant
Numerical Investigations of Currents, Eddy Kinetic Energy, and Internal-waves in the Southern Ocean
南大洋洋流、涡动能和内波的数值研究
  • 批准号:
    0525758
  • 财政年份:
    2005
  • 资助金额:
    $ 87.32万
  • 项目类别:
    Standard Grant

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Baryogenesis, Dark Matter and Nanohertz Gravitational Waves from a Dark Supercooled Phase Transition
  • 批准号:
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  • 批准号:
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  • 批准号:
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