CAREER: Fluxes and Structures in Double-Diffusive Convection

职业:双扩散对流中的通量和结构

基本信息

  • 批准号:
    0547650
  • 负责人:
  • 金额:
    $ 53.91万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2006
  • 资助国家:
    美国
  • 起止时间:
    2006-03-01 至 2012-02-29
  • 项目状态:
    已结题

项目摘要

The significance of double-diffuse mixing for water-mass transformation and determining the structure of the temperature-salinity relationship in all oceans is becoming increasingly clear over the last few years. One of the most intriguing aspects of double-diffuse convection is related to its ability to transform smooth vertical gradients into the stepped structures consisting of mixed layers separated by thin stratified interfaces. Recent field data from the tropical Atlantic has shown that vertical fluxes due to salt fingers within thermohaline staircases are significant (by order of magnitude) enhanced over non-staircase regions with similar stratifications. (Schmitt et al., 2005). Thus, it is vital to improve our understanding of the thermohaline staircase formation, evolution and the large scale consequences. In this CAREER award, a researcher at the Naval Postgraduate School will quantify the double-diffusive transport in both smooth gradients and thermohaline staircases, developing a clearer insight into the origin of staircases and specifying the conditions for their information. The work will involve a combination of numerical process modeling and theoretical analysis. Inferences from the theory and model runs will be used to interpret the oceanic fine-and microstructure data and results of the laboratory experiments. The results from this study will resolve the controversy with regard to the dynamics of the thermohaline staircases, the magnitude of the heat and salt mixing rates, and their variation with environmental parameters. The newly developed theory by the principle investigator will invoke the thickness of the mixed layers and the resulting diapycnal fluxes, will be explored. In addition to the intellectual merit of the work, the proposed teaching activities will target the Naval Postgraduate School students and expose them to the physics of the ocean microstructure by developing a special topics course, expanding the distance learning program, and advising several graduate students.
在过去几年里,双扩散混合对水团转化和确定所有海洋温度-盐度关系结构的重要性日益明显。 双扩散对流最有趣的方面之一是它能够将平滑的垂直梯度转化为由薄分层界面分隔的混合层组成的阶梯结构。 最近从热带大西洋的现场数据表明,由于盐指温盐阶梯内的垂直通量显着(数量级)增强非阶梯地区具有类似的分层。 (施密特等人,2005年)。因此,提高对温盐阶梯形成、演化及其大尺度后果的认识是至关重要的。 在这项职业奖中,海军研究生院的一名研究人员将量化平滑梯度和温盐楼梯中的双扩散运输,更清楚地了解楼梯的起源,并指定其信息的条件。 这项工作将涉及数值过程建模和理论分析相结合。 从理论和模型运行的推论将被用来解释海洋精细和微观结构的数据和实验室实验的结果。 这项研究的结果将解决有关温盐阶梯的动力学,热和盐混合速率的大小,以及它们随环境参数的变化的争议。 新开发的理论的主要研究者将调用的混合层的厚度和由此产生的diapycnal通量,将进行探讨。 除了这项工作的智力价值外,拟议的教学活动将以海军研究生院的学生为目标,通过开发一门专题课程、扩大远程学习方案和为几名研究生提供咨询,使他们接触海洋微观结构的物理学。

项目成果

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Timour Radko其他文献

Timour Radko的其他文献

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{{ truncateString('Timour Radko', 18)}}的其他基金

Collaborative Research: The impact of irregular small-scale topography on large-scale circulation patterns
合作研究:不规则小尺度地形对大尺度环流格局的影响
  • 批准号:
    2241625
  • 财政年份:
    2023
  • 资助金额:
    $ 53.91万
  • 项目类别:
    Interagency Agreement
Origin, Dynamics, and Maintenance Mechanisms of Super Long-Lived Eddies
超长寿命涡流的起源、动力学和维持机制
  • 批准号:
    1828843
  • 财政年份:
    2018
  • 资助金额:
    $ 53.91万
  • 项目类别:
    Interagency Agreement
A theoretical and numerical study of diffusive convection and its impact on high latitude large scale ocean circulation patterns
扩散对流及其对高纬度大尺度海洋环流模式影响的理论和数值研究
  • 批准号:
    1756491
  • 财政年份:
    2018
  • 资助金额:
    $ 53.91万
  • 项目类别:
    Interagency Agreement
Finescale Dynamics of the Double-Diffusive Thermocline
双扩散温跃层的精细尺度动力学
  • 批准号:
    1334914
  • 财政年份:
    2013
  • 资助金额:
    $ 53.91万
  • 项目类别:
    Interagency Agreement
Collaborative Research: Origin, Dynamics and Transport Characteristics of the Large-Scale Eddy-Driven Patterns
合作研究:大尺度涡驱动模式的起源、动力学和输运特征
  • 批准号:
    1155866
  • 财政年份:
    2012
  • 资助金额:
    $ 53.91万
  • 项目类别:
    Interagency Agreement
COLLABORATIVE RESEARCH: Fingering convection at low Prandtl number
合作研究:低普朗特数下的指对对流
  • 批准号:
    0933057
  • 财政年份:
    2010
  • 资助金额:
    $ 53.91万
  • 项目类别:
    Interagency Agreement
COLLABORATIVE RESEARCH: Numerical studies of double-diffusive convection in the interior of giant planets
合作研究:巨行星内部双扩散对流的数值研究
  • 批准号:
    0806431
  • 财政年份:
    2008
  • 资助金额:
    $ 53.91万
  • 项目类别:
    Interagency Agreement
Collaborative Research: Studies of the Influence of the Antarctic Circumpolar Current on the Atlantic Meridional Circulation
合作研究:南极绕极流对大西洋经向环流的影响研究
  • 批准号:
    0623524
  • 财政年份:
    2006
  • 资助金额:
    $ 53.91万
  • 项目类别:
    Standard Grant

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