Collaborative Research: Gravity Wave-Airglow Interactions in Multiple Emission Layers

合作研究：多个发射层中的重力波-气辉相互作用

基本信息

批准号：
1903336
负责人：
Gary Swenson
金额：
$ 10.39万
依托单位：
University of Illinois at Urbana-Champaign
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：
2019-08-01 至 2022-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1903336&HistoricalAwards=false
关键词：
Collaborative Research Gravity Wave Airglow

项目摘要

Perturbations in the neutral density in the Earth's middle and upper atmosphere known as gravity waves (GWs) are thought to be an important driver of physical and chemical processes in the mesosphere and lower thermosphere (MLT) atmospheric region. GWs influence tidal and planetary wave dynamics as well as general circulation and transport processes across many atmospheric layers. The goal of this project is to investigate the interaction of GWs and airglow, faint optical emission emitted by atoms and molecules in MLT during the night. Through this, a better understanding of the impact of GWs on chemical species in the MLT region will be achieved. This project will conduct observations in multiple airglow layers with a chain of airglow imagers near the Andes Lidar Observatory (ALO) in Chile, a well-known GW "hotspot". This will be complemented by observations with the collocated lidar and meteor radar, satellites, and results from time-dependent, nonlinear atmospheric models. This project will promote education by supporting a graduate student and an undergraduate student and contribute to broadening participation by supporting the team that includes members from underrepresented groups.The work will involve characterization of GW activity near ALO based on the imaging airglow data and comparison of simulation results of GW-airglow interactions with imaging observations. Recent modeling results using a 2D, nonlinear, time-dependent OH Chemistry-Dynamics (OHCD) model and a Multiple-Airglow Chemistry-Dynamics (MACD) models have shown that a transient dissipating GW packet can induce significant variations in the concentrations of the minor species, in the airglow intensity, and in exothermal heating. The variations appear to be aperiodic but are often mistaken for long-period waves. These are secular variations which are a result of a net cycle-averaged transport of chemically-active minor species. The project will simulate secular variations in airglow causes by GWs by using a model of GW propagation together with airglow chemistry models, OHCD and MACD, in conjunction with optical, lidar, and meteor radar observations at ALO complemented by spacecraft data from SABER and SCIAMACHY.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.

地球中部和上层大气中中性密度的扰动被称为重力波（GWS），被认为是中层和下热层（MLT）大气区域物理和化学过程的重要驱动力。 GWS影响潮汐和行星波动力学以及许多大气层的一般循环和运输过程。该项目的目的是研究GWS和气球的相互作用，在夜间由原子和分子发出的微弱光学发射。通过此，将更好地理解GWS对MLT地区化学物种的影响。该项目将在多个气球层进行观察，并在智利的安第斯山脉雷达观察站（ALO）附近，智利是著名的GW“热点”。这将通过与时间依赖性的非线性大气模型相互关联的激光雷达和流星雷达和流星雷达，卫星的观察结果进行补充。该项目将通过支持一名研究生和本科生来促进教育，并通过支持包括代表性不足小组的成员的团队来为扩大参与而做出贡献。这项工作将涉及基于Imaging Airglow数据附近的GW活动的表征以及基于Imaging Airglow数据的比较，并比较GW-Airglow与图像观察的GW-Airglow相互作用的模拟结果。使用2D，非线性，时间依赖性OH化学动力学（OHCD）模型和多动力学化学动力学（MACD）模型的最新建模结果表明，瞬态耗散的GW包可以在空气强度和空心热量中引起次要物种的浓度显着变化。这些变化似乎是一个充满活力的，但通常被误认为是长周期波。这些是世俗变化，是化学活性小物种的净周期平均运输的结果。该项目将通过使用GW传播模型与空气流化学模型OHCD和MACD以及光学，激光雷达和流星雷达观察到ALO对ALO的ALO互补的Scaber和Scabraft数据补充。使用基金会的智力优点和更广泛的影响评估标准进行评估。