Collaborative Research: Quantifying KHI, Turbulence Processes and Radar Biases Using Radar Observations and In Situ Measurements at JRO and Very-High-Resolution DNS

合作研究:利用 JRO 和超高分辨率 DNS 的雷达观测和原位测量来量化 KHI、湍流过程和雷达偏差

基本信息

  • 批准号:
    1041977
  • 负责人:
  • 金额:
    $ 28.5万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2011
  • 资助国家:
    美国
  • 起止时间:
    2011-09-15 至 2012-09-30
  • 项目状态:
    已结题

项目摘要

This is a 3-year project to undertake experimental and theoretical studies of Kelvin-Helmholtz Instability (KHI) dynamics and their implications for turbulence and mixing in the Earth atmosphere. KHI is known to occur throughout the lower atmosphere as well as the mesosphere and lower thermosphere (MLT) and to contribute significantly to the dynamics. In addition, KHI evolution affects VHF Doppler radar wind measurement errors by producing strong, persistent layering and a systematic tilting of refractive index surfaces on scales comparable to VHF radar Bragg scales. This project addresses both of these aspects. Observations will be performed at the Jicamarca Radio Observatory (JRO) in Peru, which provides an exceptional combination of sensitivity and resolution throughout the lower atmosphere and the MLT. High range resolution and sensitivity at mid-tropospheric heights provided by the SOUSY Radar (at JRO), coupled with concurrent, quantitative, high-resolution, in situ measurements made using a newly developed unmanned aerial system, named the micro-autonomous vehicle (MAV), will provide an unsurpassed assessment of both high resolution KHI dynamics and radar measurement errors. The relatively high-resolution and higher-power capability provided by the powerful JRO transmitter and large antenna array will then extend the SOUSY results into the MLT. Finally, these observations will be used to initialize a series of numerical assessments of KHI radar backscatter and associated dynamical parameters using a new capability to perform direct numerical simulations (DNS) to characterize, and guide corrections of, measurement errors accompanying these dynamics for general flow conditions.The inaccuracies in radar wind measurements from KHI is a limiting factor in understanding atmospheric dynamics on essentially all scales of motion, including: mean motions, wind shears, large-scale tidal and planetary wave activity, smaller-scale gravity wave dynamics, and small-scale instabilities and turbulence-generating processes. The results from this project, therefore, will improve practically all applications of VHF radar observations to great benefit of the scientific community as well as weather and climate modeling applications. The project also will result in improved quantitative understanding of interactions between waves and instability dynamics that drive motions throughout the atmosphere and at all scales. This will lead to better parameterization of small-scale dynamics in weather and climate models.
这是一个为期3年的项目,对开尔文-亥姆霍兹不稳定性(KHI)动力学及其对地球大气湍流和混合的影响进行实验和理论研究。众所周知,KHI发生在整个低层大气以及中间层和低热层(MLT),并对动力学做出重大贡献。 此外,KHI的演变影响VHF多普勒雷达风测量误差,产生强大的,持久的分层和系统倾斜的折射率表面的规模可与VHF雷达布拉格尺度。 本项目涉及这两个方面。 观测将在秘鲁的希卡马卡射电观测台进行,该观测台在整个低层大气和MLT中提供了灵敏度和分辨率的出色组合。SOUSY雷达(在JRO)提供的对流层中部高度的高距离分辨率和灵敏度,加上使用新开发的无人驾驶航空系统(称为微型自主飞行器)进行的并行、定量、高分辨率、现场测量,将对高分辨率KHI动态和雷达测量误差进行无与伦比的评估。强大的JRO发射机和大型天线阵列提供的相对高分辨率和更高功率的能力将把SOUSY结果扩展到MLT中。最后,这些观测结果将用于初始化一系列对KHI雷达后向散射和相关动力学参数的数值评估,使用一种新的能力进行直接数值模拟(DNS),以表征和指导KHI雷达后向散射和相关动力学参数的修正,测量误差伴随着这些动力学的一般流动条件。在雷达风测量的不准确性,从KHI是一个限制因素,在理解大气动力学的基本上所有这些观测和研究涉及运动尺度,包括:平均运动、风切变、大尺度潮汐和行星波活动、小尺度重力波动力学以及小尺度不稳定性和湍流生成过程。因此,该项目的结果将改善VHF雷达观测的所有应用,使科学界以及天气和气候建模应用受益匪浅。 该项目还将提高对波与不稳定动力学之间相互作用的定量理解,这些动力学驱动整个大气层和所有尺度的运动。这将导致天气和气候模型中小尺度动态的参数化更好。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

David Fritts其他文献

David Fritts的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('David Fritts', 18)}}的其他基金

Mesosphere and Lower Thermosphere Dynamics Studies Employing the Southern Argentina Agile MEteor Radar (SAAMER), Correlative Measurements, and Modeling
利用阿根廷南部敏捷流星雷达 (SAAMER) 进行中层和低层热层动力学研究、相关测量和建模
  • 批准号:
    2131350
  • 财政年份:
    2022
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Convective Gravity Waves in the Stratosphere (CGWaveS)
合作研究:平流层对流重力波(CGWaveS)
  • 批准号:
    2017263
  • 财政年份:
    2021
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: New Pathways to Enhanced Turbulence and Mixing via Kelvin-Helmholtz Instability Tube and Knot Dynamics
合作研究:通过开尔文-亥姆霍兹不稳定管和结动力学增强湍流和混合的新途径
  • 批准号:
    2128443
  • 财政年份:
    2021
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Standard Grant
Multi-Scale Dynamics Studies Using the Drake Antarctic Agile Meteor Radar
使用德雷克南极敏捷流星雷达进行多尺度动力学研究
  • 批准号:
    1744801
  • 财政年份:
    2018
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: Expanded Correlative Dynamics and Meteor Studies Using the Southern Argentina Agile MEteor Radar
合作研究:使用阿根廷南部敏捷流星雷达扩展相关动力学和流星研究
  • 批准号:
    1647354
  • 财政年份:
    2017
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: CEDAR--Life Cycle of the Quasi Two-Day Wave in the Southern Hemisphere
合作研究:CEDAR——南半球准两天波的生命周期
  • 批准号:
    1552176
  • 财政年份:
    2016
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: Instabilities, Dynamics, and Energetics accompanying Atmospheric Layering (IDEAL)
合作研究:伴随大气分层的不稳定性、动力学和能量(IDEAL)
  • 批准号:
    1632772
  • 财政年份:
    2016
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: CEDAR: High-Resolution Imaging of Instability Dynamics and Breakdown
合作研究:CEDAR:不稳定动力学和击穿的高分辨率成像
  • 批准号:
    1445783
  • 财政年份:
    2015
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: Quantification of Gravity Wave Momentum Fluxes and Instability Events in the Mesosphere and Lower Thermosphere (MLT) Region at High- and Mid- Latitudes
合作研究:高、中纬度中层和低热层(MLT)区域重力波动量通量和不稳定事件的量化
  • 批准号:
    1449633
  • 财政年份:
    2015
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: Deep Propagating Gravity Wave (DEEPWAVE)
合作研究:深度传播重力波(DEEPWAVE)
  • 批准号:
    1338646
  • 财政年份:
    2014
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Continuing Grant

相似国自然基金

Research on Quantum Field Theory without a Lagrangian Description
  • 批准号:
    24ZR1403900
  • 批准年份:
    2024
  • 资助金额:
    0.0 万元
  • 项目类别:
    省市级项目
Cell Research
  • 批准号:
    31224802
  • 批准年份:
    2012
  • 资助金额:
    24.0 万元
  • 项目类别:
    专项基金项目
Cell Research
  • 批准号:
    31024804
  • 批准年份:
    2010
  • 资助金额:
    24.0 万元
  • 项目类别:
    专项基金项目
Cell Research (细胞研究)
  • 批准号:
    30824808
  • 批准年份:
    2008
  • 资助金额:
    24.0 万元
  • 项目类别:
    专项基金项目
Research on the Rapid Growth Mechanism of KDP Crystal
  • 批准号:
    10774081
  • 批准年份:
    2007
  • 资助金额:
    45.0 万元
  • 项目类别:
    面上项目

相似海外基金

Collaborative Research: Sediment and Stability: Quantifying the Effect of Moraine Building on Greenland Tidewater Glaciers
合作研究:沉积物和稳定性:量化冰碛建筑对格陵兰潮水冰川的影响
  • 批准号:
    2234522
  • 财政年份:
    2024
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Sediment and Stability: Quantifying the Effect of Moraine Building on Greenland Tidewater Glaciers
合作研究:沉积物和稳定性:量化冰碛建筑对格陵兰潮水冰川的影响
  • 批准号:
    2234523
  • 财政年份:
    2024
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Sediment and Stability: Quantifying the Effect of Moraine Building on Greenland Tidewater Glaciers
合作研究:沉积物和稳定性:量化冰碛建筑对格陵兰潮水冰川的影响
  • 批准号:
    2234524
  • 财政年份:
    2024
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Standard Grant
Collaborative Research: BoCP-Implementation: Quantifying the response of biodiverse freshwater ecosystems to abrupt and progressive environmental change
合作研究:BoCP-实施:量化生物多样性淡水生态系统对突然和渐进的环境变化的响应
  • 批准号:
    2325895
  • 财政年份:
    2024
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Standard Grant
Collaborative Research: BoCP-Implementation: Quantifying the response of biodiverse freshwater ecosystems to abrupt and progressive environmental change
合作研究:BoCP-实施:量化生物多样性淡水生态系统对突然和渐进的环境变化的响应
  • 批准号:
    2325892
  • 财政年份:
    2024
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Standard Grant
Collaborative Research: BoCP-Implementation: Quantifying the response of biodiverse freshwater ecosystems to abrupt and progressive environmental change
合作研究:BoCP-实施:量化生物多样性淡水生态系统对突然和渐进的环境变化的响应
  • 批准号:
    2325891
  • 财政年份:
    2024
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Sediment and Stability: Quantifying the Effect of Moraine Building on Greenland Tidewater Glaciers
合作研究:沉积物和稳定性:量化冰碛建筑对格陵兰潮水冰川的影响
  • 批准号:
    2234520
  • 财政年份:
    2024
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Standard Grant
Collaborative Research: BoCP-Implementation: Quantifying the response of biodiverse freshwater ecosystems to abrupt and progressive environmental change
合作研究:BoCP-实施:量化生物多样性淡水生态系统对突然和渐进的环境变化的响应
  • 批准号:
    2325893
  • 财政年份:
    2024
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Standard Grant
Collaborative Research: BoCP-Implementation: Quantifying the response of biodiverse freshwater ecosystems to abrupt and progressive environmental change
合作研究:BoCP-实施:量化生物多样性淡水生态系统对突然和渐进的环境变化的响应
  • 批准号:
    2325894
  • 财政年份:
    2024
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Standard Grant
COLLABORATIVE RESEARCH: Quantifying the effects of variable light and iron on the nitrate assimilation isotope effect of phytoplankton
合作研究:量化可变光和铁对浮游植物硝酸盐同化同位素效应的影响
  • 批准号:
    2333913
  • 财政年份:
    2023
  • 资助金额:
    $ 28.5万
  • 项目类别:
    Standard Grant
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了