Collaborative Research: CEDAR--Airglow Imaging of Gravity Wave and Instability Dynamics

合作研究：CEDAR——重力波和不稳定动力学的气辉成像

• 批准号: 1911970
• 负责人: Michael Taylor
• 金额: $ 23.14万
• 依托单位: Utah State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-15 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1911970&HistoricalAwards=false
• 关键词: Collaborative; Research; CEDAR; Airglow; Imaging

Turbulent structuring processes occur throughout the atmosphere, oceans, and other geophysical plasmas and fluids. Their effects range from transport and dissipation of energy to formation of visually striking structures similar to those formed when ocean waves break. This work will address a long-standing problem of atmospheric turbulence by exploring high-resolution imaging observations of atmospheric structures. Atmospheric instability processes are thought to be responsible for formation and breaking of atmospheric structures observed as faint optical emissions emitted by atoms and molecules in the mesosphere-lower-thermosphere (MLT) region during the night called airglow. This project will utilize the new state-of-the-art Aerospace Infrared Camera 2 (AIC2) imager at the Andes Lidar Observatory (ALO) in Chile complemented by the Mesosphere Temperature Mapper (MTM), the Na lidar, and meteor radar at ALO. This project will develop better understanding of the atmospheric instability processes that are thought to be responsible for formation of turbulent structures. These structures play a major role in vertical transports of energy and momentum. This research will provide new datasets to the community and improve the ability to observe small-scale processes in the critical MLT region. This project will also promote education by supporting a graduate student and contribute to broadening participation by supporting female scientists. The goals of the research are (1) to obtain AIC2 imaging of atmospheric structures down to pixel size of 30 m to characterize instability evolution, (2) to obtain correlative measurements by the MTM airglow temperature imager at two altitudes to determine wave and instability features, (3) to utilize the Na lidar and meteor radar measurements to characterize background atmospheric conditions. The work will involve (1) combining data from AIC2, MTM, Na lidar, and meteor radar, (2) identification of events that exhibit small-scale transient responses, and (3) analysis of the identified events to estimate instability scales.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

湍流结构过程发生在整个大气、海洋和其他地球物理等离子体和流体中。它们的影响范围从能量的传输和耗散到形成视觉上引人注目的结构，类似于海浪破碎时形成的结构。这项工作将通过探索大气结构的高分辨率成像观测来解决一个长期存在的大气湍流问题。大气不稳定过程被认为是大气结构形成和破裂的原因，在夜间，中间层-低层热层（MLT）区域的原子和分子发出微弱的光学辐射，称为气辉。该项目将利用智利安第斯激光雷达天文台（ALO）最新的最先进的航空航天红外相机2 （AIC2）成像仪，并辅以ALO的中间层温度绘图仪（MTM）、Na激光雷达和流星雷达。这个项目将更好地理解大气不稳定过程，而大气不稳定过程被认为是湍流结构形成的原因。这些结构在能量和动量的垂直输送中起主要作用。该研究将为社会提供新的数据集，并提高对关键MLT区域小尺度过程的观测能力。该项目还将通过支持研究生来促进教育，并通过支持女性科学家来促进扩大参与。研究的目标是：(1)获得低至30 m像素的大气结构的AIC2成像，以表征不稳定演变；(2)利用MTM气辉温度成像仪在两个高度获得相关测量，以确定波动和不稳定特征；(3)利用Na激光雷达和流星雷达测量来表征背景大气条件。这项工作将包括(1)结合来自AIC2、MTM、Na激光雷达和流星雷达的数据，(2)识别表现出小尺度瞬态响应的事件，(3)分析识别出的事件以估计不稳定尺度。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。