Collaborative Research: Theoretical and observational investigations of multi-point Monin-Obukhov similarity in the convective atmospheric surface layer

合作研究:对流大气表层多点莫宁-奥布霍夫相似性的理论和观测研究

基本信息

  • 批准号:
    2054969
  • 负责人:
  • 金额:
    $ 50万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2021
  • 资助国家:
    美国
  • 起止时间:
    2021-08-01 至 2025-07-31
  • 项目状态:
    未结题

项目摘要

This project investigates the atmospheric boundary layer (ABL)---the lowest portion of the atmosphere (approximately 1-2 km in height during daytime). Turbulence, which is responsible for commonly experienced bumpy flights, has an enormous impact on human activities and the environment. The prevailing theory of the turbulence in the ABL---the Monin-Obukhov similarity theory (MOST), while successful in many respects, has some major shortcomings. Its most glaring issue is its inability to predict large-scale wind fluctuations near the ground, which negatively impact many atmospheric applications. Dr. Tong on this proposed project has recently developed a new theory, the multi-point Monin-Obukhov similarity theory (MMO), to overcome shortcomings of MOST. In this project the researchers will further develop the theory and conduct a field campaign to systematically verify it. An improved understanding and prediction of the ABL turbulence provided by MMO can have wide-ranging implications for developing predictive models for weather forecasting, air pollution, atmospheric chemistry, and wind energy. The project will provide opportunities for a postdoctoral researcher and graduate and undergraduate students to participate in all aspects of the project. In addition, in collaboration with scientists and engineers from the National Center for Atmospheric Research (NCAR) responsible for deploying a suite of research instruments, the research team will host field trips for K-12 students at the field campaign site near Kettleman City, CA, to demonstrate how turbulence and other meteorological variables are measured. The researchers will further develop comprehensive first-principles-based predictions of the similarity properties of the daytime ABL to account for the influences of observed ABL conditions and to understand the underlying physics. A field campaign will be carried out in collaboration with NCAR to make comprehensive measurements of the mean velocity and temperature profiles throughout the depth of the boundary layer and the turbulence spectra in the surface layer. A suite of instruments including a sonic anemometer array, three Doppler lidars, an aerosol lidar, a micro-pulse lidar, a distributed temperature measurement system, a radio acoustic sounding system, a quadcoptor temperature system, and radiosondes will be used in the measurements. For each statistic, multiple instruments will be used, with each instrument covering a different height range or a scale range to achieve the overall height and scale ranges needed. The field data will then be used to systematically verify the scaling prediction and establish the (expansion) coefficients in the theory and the functional forms of the MMO similarity functions for turbulence spectra and mean profiles.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.
该项目研究大气边界层(ABL)——大气的最低部分(白天高度约为1-2公里)。湍流对人类活动和环境有着巨大的影响,它是造成飞行颠簸的主要原因。ABL中流行的湍流理论——莫宁-奥布霍夫相似理论(MOST),虽然在许多方面是成功的,但也有一些主要的缺点。它最突出的问题是无法预测地面附近的大规模风波动,这对许多大气应用产生了负面影响。在这个项目中,Tong博士最近提出了一个新的理论,即多点莫宁-奥布霍夫相似理论(MMO),以克服MOST的缺点。在这个项目中,研究人员将进一步发展这一理论,并进行实地活动来系统地验证它。MMO提供的对ABL湍流的更好的理解和预测可以对天气预报、空气污染、大气化学和风能的预测模型的开发产生广泛的影响。该项目将为博士后研究员、研究生和本科生提供参与项目各个方面的机会。此外,与国家大气研究中心(NCAR)负责部署一套研究仪器的科学家和工程师合作,研究小组将在加利福尼亚州凯特尔曼市附近的野外活动地点为K-12学生举办实地考察活动,以演示如何测量湍流和其他气象变量。研究人员将进一步发展全面的基于第一性原理的预测,预测白天ABL的相似特性,以解释观测到的ABL条件的影响,并了解潜在的物理现象。将与NCAR合作开展实地活动,全面测量整个边界层深度的平均速度和温度分布以及表层的湍流谱。测量将使用一套仪器,包括一个声波风速计阵列、三个多普勒激光雷达、一个气溶胶激光雷达、一个微脉冲激光雷达、一个分布式温度测量系统、一个无线电声学探测系统、一个四轴飞行器温度系统和无线电探空仪。对于每个统计量,将使用多个仪器,每个仪器覆盖不同的高度范围或比例尺范围,以实现所需的整体高度和比例尺范围。然后,现场数据将用于系统地验证尺度预测,并建立理论中的(扩展)系数以及湍流谱和平均剖面的MMO相似函数的函数形式。该奖项反映了美国国家科学基金会的法定使命,并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,被认为值得支持。

项目成果

期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
The Role of Ambient Turbulence in Canopy Wave Generation by Kelvin–Helmholtz Instability
  • DOI:
    10.1007/s10546-022-00765-y
  • 发表时间:
    2023-01
  • 期刊:
  • 影响因子:
    4.3
  • 作者:
    W. Smyth;S. Mayor;Q. Lian
  • 通讯作者:
    W. Smyth;S. Mayor;Q. Lian
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Shane Mayor其他文献

Shane Mayor的其他文献

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{{ truncateString('Shane Mayor', 18)}}的其他基金

Two-component Winds from Eye-safe Elastic LIDAR and Optical Flow above the Reach of Most Towers
来自对人眼安全的弹性激光雷达和大多数塔楼上方光流的两分量风
  • 批准号:
    1228464
  • 财政年份:
    2012
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant
RAPID: REAL Security and Safety
RAPID:真正的安全保障
  • 批准号:
    1104342
  • 财政年份:
    2010
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant
Horizontal Vector Wind Field Measurement with Eye-Safe Elastic Lidar
使用人眼安全弹性激光雷达进行水平矢量风场测量
  • 批准号:
    0924407
  • 财政年份:
    2009
  • 资助金额:
    $ 50万
  • 项目类别:
    Standard Grant

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