CAREER: Lagrangian investigation of upper ocean turbulence

职业:上层海洋湍流的拉格朗日研究

基本信息

  • 批准号:
    1352422
  • 负责人:
  • 金额:
    $ 40.05万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2014
  • 资助国家:
    美国
  • 起止时间:
    2014-03-01 至 2021-02-28
  • 项目状态:
    已结题

项目摘要

Turbulent processes in the upper ocean play a key role in weather and climate systems by coupling the ocean and atmosphere. Upper ocean turbulence also distributes nutrients, pollutants, plankton, and bubbles in the ocean mixed layer. The fate of chemical and biological substances in the mixed layer depends on the history of advective turbulent fluid paths. Besides being dispersive, ocean turbulence also aggregates substances to increase encounter rates between them. Upper ocean turbulence is driven by surface waves: Wave-current interactions lead to wind-aligned vortices, called Langmuir circulation (LC), and breaking waves are a source of near surface turbulent kinetic energy. Together, LC and the stochastically breaking wave field lead to complicated nonlocal and intermittent transport. To better understand the dynamics of the complex oceanic boundary layer and to educate students about upper ocean processes, the PI will carry out an interwoven research and education program. This project is a systematic Lagrangian investigation following trajectories of fluid parcels with the Research Objectives to: 1) Develop a Lagrangian analysis framework of the upper ocean with realistic surface wave effects to investigate fundamental mechanisms of fluid exchange in the presence of surface waves, 2) Examine the role of LC and breaking waves in upper ocean transport to assess systematically the accuracy of common upper ocean boundary layer parameterizations, 3) Apply the Lagrangian analysis to quantify plastic marine debris that has emerged as a major ocean pollutant and to revisit related classic ideas of particle trapping in the upper ocean. Tracks of particles will be computed from state-of-the art upper ocean large eddy simulation models with LC and breaking wave effects. As part of the Lagrangian analysis, this project will apply a new and integrative dynamic systems approach to the wave-driven upper ocean boundary layer. To directly utilize knowledge gained from this study, the PI will examine observed distributions of plastic marine debris. The project involves two related education activities that are linked to the research activities on upper ocean dynamics with the Education Objectives to: 1) Educate students about ocean physics and its role in climate change and global pollution, 2) Inspire students to pursue STEM education and careers by engaging students in problem-based learning and implementing Next Generation Science Standards, 3) Involve underrepresented students. The first educational activity will involve the PI's participation in the active education programs on marine debris at the Sea Education Association, reaching out to undergraduate students and the general public. The second education activity is centered on developing a hands-on laboratory educational unit, which will be incorporated into regular curricula of high schools with a large number of underrepresented students and also into the University of Delaware's Forum to Advance Minorities in Engineering Program, which is aimed at increasing the effective participation of minority students in engineering and other science professions. Both activities incorporate the PI's expertise in geophysical fluids dynamics, upper ocean physics, and ongoing research collaborations.Intellectual Merit: By revealing regions of attraction, repulsion, and intense mixing, the Lagrangian framework provides a natural approach to investigating turbulence that has yet to be systematically explored in the context of wave-driven upper ocean dynamics. Thus, the study bears high potential to uncover a novel, highly physical description of upper ocean turbulence that will ultimately enhance the parameterizations of turbulent transport in larger scale ocean models.Broader Impacts: The PI will advance coupled ocean-atmosphere models of weather and climate by improving the ability to parameterize air-sea fluxes and ocean turbulence. The research will facilitate communication between the ocean physics and marine debris research communities, a necessary step in effectively quantifying and ultimately managing ocean pollution. Because the topic of marine pollution is accessible to a broad audience, the project activities present a unique opportunity to educate the general public, high school minority students, undergraduate students, and graduate students about ocean turbulence and fluid dynamics in a collaborative environment with experts in upper ocean dynamics, numerical modeling, dynamic systems theory, and sea-going oceanography.
上层海洋的湍流过程通过耦合海洋和大气在天气和气候系统中发挥关键作用。上层海洋湍流也会在海洋混合层中分布营养物、污染物、浮游生物和气泡。化学和生物物质在混合层中的命运取决于平流湍流路径的历史。除了分散之外,海洋湍流还聚集了物质,增加了它们之间的相遇率。上层海洋的湍流是由表面波驱动的:波流相互作用会导致与风排列的漩涡,称为朗缪尔环流(LC),而破碎波是近表面湍流动能的来源。LC和随机破碎波场共同导致了复杂的非局部和间歇输运。为了更好地了解复杂的海洋边界层动力学和教育学生有关上层海洋过程,PI将开展一个相互交织的研究和教育计划。这个项目是一个系统的拉格朗日研究,跟随流体包裹的轨迹,研究目标是:1)建立具有实际表面波效应的上层海洋拉格朗日分析框架,以研究表面波存在下流体交换的基本机制;2)研究LC和破碎波在上层海洋运输中的作用,以系统地评估上层海洋边界层参数化的准确性;3)应用拉格朗日分析来量化已成为主要海洋污染物的海洋塑料垃圾,并重新审视上层海洋颗粒捕获的相关经典思想。粒子轨迹将从具有LC和破波效应的最先进的上层海洋大涡模拟模型中计算。作为拉格朗日分析的一部分,本项目将应用一种新的综合动力系统方法来研究波浪驱动的海洋上层边界层。为了直接利用从这项研究中获得的知识,PI将检查观察到的海洋塑料垃圾的分布。该项目涉及与上层海洋动力学研究活动相关的两个相关教育活动,其教育目标是:1)向学生传授海洋物理学及其在气候变化和全球污染中的作用;2)通过让学生参与基于问题的学习和实施下一代科学标准,激励学生追求STEM教育和职业生涯;3)让代表性不足的学生参与进来。第一项教育活动将包括PI参与海洋教育协会关于海洋垃圾的积极教育项目,面向本科生和公众。第二项教育活动的重点是开发一个动手实验教育单元,该单元将被纳入有大量未被充分代表的学生的高中的常规课程,也将被纳入特拉华大学促进少数族裔工程项目论坛,该论坛旨在提高少数族裔学生在工程和其他科学专业的有效参与。这两项活动都结合了PI在地球物理流体动力学、上层海洋物理学和正在进行的研究合作方面的专业知识。知识价值:通过揭示吸引、排斥和强烈混合的区域,拉格朗日框架为研究湍流提供了一种自然的方法,这种方法尚未在波浪驱动的上层海洋动力学背景下进行系统探索。因此,这项研究具有很大的潜力,可以揭示一种新的、高度物理的上层海洋湍流描述,最终将增强更大尺度海洋模式中湍流输送的参数化。更广泛的影响:通过提高海气通量和海洋湍流的参数化能力,PI将推进天气和气候的海洋-大气耦合模式。这项研究将促进海洋物理学和海洋垃圾研究界之间的交流,这是有效量化和最终管理海洋污染的必要步骤。由于海洋污染的主题是面向广大受众的,项目活动提供了一个独特的机会,在与上层海洋动力学、数值模拟、动力系统理论和航海海洋学专家合作的环境中,向普通公众、高中少数民族学生、本科生和研究生教育海洋湍流和流体动力学。

项目成果

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Tobias Kukulka其他文献

Zooplankton-microplastic exposure in Delaware coastal waters: Atlantic blue crab (Callinectes sapidus) larvae case study.
特拉华州沿海水域的浮游动物微塑料暴露:大西洋蓝蟹(Callinectes sapidus)幼虫案例研究。
  • DOI:
    10.1016/j.marpolbul.2023.115541
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    5.8
  • 作者:
    Todd X. Thoman;Tobias Kukulka;Jonathan H. Cohen;Hayden Boettcher
  • 通讯作者:
    Hayden Boettcher
Zooplankton-microplastic exposure in Delaware coastal waters: Atlantic blue crab (emCallinectes sapidus/em) larvae case study
特拉华沿海水域浮游动物-微塑料暴露:大西洋蓝蟹(Callinectes sapidus)幼虫案例研究
  • DOI:
    10.1016/j.marpolbul.2023.115541
  • 发表时间:
    2023-11-01
  • 期刊:
  • 影响因子:
    4.900
  • 作者:
    Todd X. Thoman;Tobias Kukulka;Jonathan H. Cohen;Hayden Boettcher
  • 通讯作者:
    Hayden Boettcher

Tobias Kukulka的其他文献

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{{ truncateString('Tobias Kukulka', 18)}}的其他基金

Collaborative Research: Lagrangian transport and patchiness of buoyant material in estuarine systems
合作研究:河口系统中浮力物质的拉格朗日输送和斑块性
  • 批准号:
    2148370
  • 财政年份:
    2022
  • 资助金额:
    $ 40.05万
  • 项目类别:
    Standard Grant
Conference: The Middle Atlantic Bight Physical Oceanography and Meteorology (MABPOM) Meeting 2022
会议:2022 年大西洋中湾物理海洋学和气象学 (MABPOM) 会议
  • 批准号:
    2245843
  • 财政年份:
    2022
  • 资助金额:
    $ 40.05万
  • 项目类别:
    Standard Grant
Collaborative Research: The Heated Wind- and Wave-Driven Ocean Surface Boundary Layer: Synergistic Analyses of Observations and Simulations
合作研究:受热的风和波浪驱动的海洋表面边界层:观测和模拟的协同分析
  • 批准号:
    2219825
  • 财政年份:
    2022
  • 资助金额:
    $ 40.05万
  • 项目类别:
    Standard Grant
Upper Ocean Turbulence in Non-Equilibrium Conditions
非平衡条件下的上层海洋湍流
  • 批准号:
    1634578
  • 财政年份:
    2016
  • 资助金额:
    $ 40.05万
  • 项目类别:
    Standard Grant
Collaborative Research: Langmuir Turbulence Under Tropical Cyclones
合作研究:热带气旋下的朗缪尔湍流
  • 批准号:
    1130678
  • 财政年份:
    2011
  • 资助金额:
    $ 40.05万
  • 项目类别:
    Standard Grant

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