Thermospheric Responses to Gravity Waves Dissipated by Molecular Viscosity and Thermal Conductivity

分子粘度和热导率对重力波耗散的热层响应

• 批准号: 0537311
• 负责人: Sharon Vadas
• 金额: $ 26.04万
• 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: 2006
• 资助国家: 美国
• 起止时间: 2006-06-01 至 2009-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0537311&HistoricalAwards=false
• 关键词: Thermospheric; Responses; Gravity; Waves; Dissipated

This is a three-year project to conduct a theoretical investigation of gravity wave propagation in the thermosphere. An advanced ray-tracing model that takes into account the strong diffusion in the thermosphere was recently developed by the proposing team and will be utilized in this project. Like-wise, the wave source will be generated by a model that simulates the secondary waves generated by wave breaking in the mesopause and waves generated by mesoscale convective complexes, which was also recently developed by the proposers. A specific objective is to determine the variation of gravity wave forcing and spectra due to variations in the gravity wave source and in the background atmosphere.The problems that this project will address are significant to a wide range of research areas from global circulation modeling to space weather. Specifically, better understanding of wave propagation into the thermosphere is essential to resolve their role in generating, and hence forecasting, such phenomena as equatorial spread-F, which has significant space weather effects. In addition, the project would promote the participation of women in science by helping to advance the successful research career of a female scientist.

这是一个为期三年的项目，对热大气层中的重力波传播进行理论研究。提议小组最近开发了一个先进的射线追踪模型，该模型考虑到了热大气层中的强烈扩散，将在本项目中使用。同样，波源将由一个模型产生，该模型模拟中层顶波浪破碎产生的二次波和中尺度对流复合体产生的波，这也是提议者最近开发的。一个具体的目标是确定由于重力波源和背景大气的变化而引起的重力波强迫和谱的变化，这个项目将解决的问题对从全球环流模拟到空间天气的广泛研究领域都具有重要意义。具体而言，更好地了解波在热层中的传播对于解决波在产生并因此预测具有重大空间气象影响的赤道扩展F等现象方面的作用至关重要。此外，该项目将通过帮助推动女科学家的成功研究事业，促进妇女参与科学。