Studies of Acoustic Gravity Waves in the Atmosphere

大气中声重力波的研究

• 批准号: 8704947
• 负责人: K. Yeh
• 金额: $ 33.69万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-06-15 至 1991-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8704947&HistoricalAwards=false
• 关键词: Studies; Acoustic; Gravity; Waves; Atmosphere

The ubiquitous presence of acoustic-gravity waves at all levels of the atmosphere is well known. These waves, after being excited by various sources, can propagate throughout all levels of the atmosphere from the troposphere to the thermosphere and can propagate large horizontally distances on the global scale. As these waves carry momentum and energy, they may play and important role in determining the large-scale circulation in the middle atmosphere and in coupling between the thermosphere and the lower atmosphere. The World Acoustic Gravity Wave Study (WAGS) study involves periodic campaigns, in which the PI and his associates participate. They were involved in a workshop on WAGS in January 1987. They will analyze data from the campaigns and perform theoretical investigations on the interaction of radar beams and propagating waves. Other theoretical research topics include the interaction of gravity waves with atmospheric vortices, such as are found in cyclonic disturbances. The subject of gravity waves is receiving increased attention as a source of energy and momentum coupling between the lower and upper atmospheres, and of mixing and turbulence throughout the atmosphere. The PI and Co I are internationally recognised experts in the field.

声重力波在大气的各个层面无处不在，这是众所周知的。这些波在受到各种来源的激发后，可以从对流层传播到热层，在大气的各个层次上传播，并可以在全球范围内传播很远的水平距离。由于这些波携带动量和能量，它们在决定中层大气的大尺度环流和热层与低层大气的耦合中可能起重要作用。世界声重力波研究（WAGS）研究包括周期性运动，PI和他的同事参与其中。1987年1月，他们参加了一个关于WAGS的研讨会。他们将分析来自运动的数据，并对雷达波束和传播波的相互作用进行理论研究。其他理论研究课题包括重力波与大气涡旋的相互作用，例如在气旋扰动中发现的涡旋。重力波作为低层和高层大气之间能量和动量耦合的来源，以及整个大气的混合和湍流的来源，正受到越来越多的关注。PI和Co I是该领域国际公认的专家。