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
• 起止时间: 1997-08-01 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9618004&HistoricalAwards=false
• 关键词: Modeling; Turbulence; Generation; Smale; Scale

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.

PI将结合联合收割机的湍流生成和标量谱和湍流运动引起的离子，电子和气溶胶成分的共同光谱的数值和理论研究。 这将使人们从理论上了解小尺度结构及其与中层和低热层雷达后向散射强度和特征的联系。 PI计划解决在VHF和UHF频率的高施密特数的证据，不同的后向散射强度和特性在不同的频率，和湍流对预先存在的梯度的电子，离子和气溶胶在极地夏季中层顶和更一般的MLT条件的影响。