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Modeling of Turbulence Generation and Smale-Scale Structure with Applications to Radar Backscatter

Modeling of Turbulence Generation and Smale-Scale Structure with Applications to Radar Backscatter
湍流生成和小尺度结构建模及其在雷达后向散射中的应用
批准号：
9618004
负责人：
David Fritts
金额：
$27.0万
依托单位：
NorthWest Research Associates, Incorporated
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1997
资助国家：
美国
项目状态：
已结题
起止时间：
1997-08-01 至 2000-07-31
来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9618004&HistoricalAwards=false
关键词：
ModelingTurbulenceGenerationSmaleScale

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中文摘要
翻译
PIS将结合湍流产生的数值和理论研究，以及由湍流运动引起的离子、电子和气溶胶成分的标量光谱和共光谱。这将有助于从理论上理解小尺度结构及其与中间层和低热层(MLT)的雷达后向散射强度和特征的联系。PI计划解决VHF和UHF频率的高施密特数的证据，不同频率的不同后向散射强度和特征，以及在极地夏季中层顶和更一般的MLT条件下湍流对预先存在的电子、离子和气溶胶梯度的影响。
英文摘要
The PIs will combine numerical and theoretical studies of turbulence generation and scalar spectra and co-spectra of ion, electron and aerosol constituents caused by turbulence motions. This should provide a theoretical understanding of small-scale structure and its connection to radar backscatter intensities and characteristics in the mesosphere and lower thermosphere (MLT). The PI plans to address evidence for high Schmidt numbers at VHF and UHF frequencies, different backscatter intensities and characteristics at different frequencies, and influences of turbulence on pre-existing gradients of electrons, ions, and aerosols under polar summer mesopause and more general MLT conditions.
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会议论文
Mesosphere and Lower Thermosphere Dynamics Studies Employing the Southern Argentina Agile MEteor Radar (SAAMER), Correlative Measurements, and Modeling
Collaborative Research: Convective Gravity Waves in the Stratosphere (CGWaveS)
Collaborative Research: New Pathways to Enhanced Turbulence and Mixing via Kelvin-Helmholtz Instability Tube and Knot Dynamics
Multi-Scale Dynamics Studies Using the Drake Antarctic Agile Meteor Radar
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