Fundamental Coupling Processes in the Mesosphere, Lower Thermosphere (MLT) Using Enhanced Na Wind-temperature Lidar Measurements at the Atmospheric Lidar Observatory

使用大气激光雷达观测站增强型 Na 风温激光雷达测量来研究中间层、低热层 (MLT) 的基本耦合过程

• 批准号: 1734333
• 负责人: Tao Yuan
• 金额: $ 17.61万
• 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: 2017
• 资助国家: 美国
• 起止时间: 2017-08-15 至 2019-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1734333&HistoricalAwards=false
• 关键词: Fundamental; Coupling; Processes; Mesosphere; Lower

TThis award is to operate a sodium and Rayleigh lidar systems in the middle latitudes of the Northern Hemisphere (at Logan, Utah). This combined lidar system would be used to undertake correlative studies, addressing new challenges in mesosphere and lower thermosphere (MLT) dynamics as well as extending ongoing work on the study of the interactions of the ionospheric plasma with the neutral atmosphere through collisional interactions. The systems would be capable of measuring three-dimensional wind, neutral temperature and sodium density profiles at high vertical resolution and temporal cadence with a temperature profile for the range from 30 to 115 km and a wind profile for the range from 80 to 105 km. When neutral Na is present at higher altitudes (possibly as a result of sporadic layer formations) the wind and temperature observations can then be extended up to ­140 km into the lower thermosphere. This unprecedented vertical measurement range will, for the first time, allow waves to be studied all the way from the region where they are initiated up to the region where they die out. The facility will also represent an excellent means of training young optical engineering physicists that would then be well suited for many possible career paths in academia and industrial research. The major scientific goals of the research include the following objectives: 1. characterization of gravity wave (GW) propagation, refraction, ducting, and energy and momentum transports in variable environments, e.g., MLT responses to stratospheric warmings, 2. quantification of GW instability dynamics driving energy and momentum deposition, turbulence, heat, momentum, and constituent transports, and mixing, 3. understanding the interactions of GWs with tides and planetary waves, their influences on these fields, and the evolution of the wave spectrum with altitude, and 4. contributing to an improved understanding of ion-neutral coupling in the E region. Studies employing the USU resonance and Rayleigh lidar systems will benefit from current and pending measurement capabilities at the Bear Lake Observatory located nearby the Logan lidar site.

这项奖项旨在在北半球（犹他州洛根）的中纬度地区运营钠和瑞利激光雷达系统。这种合并后的LIDAR系统将用于进行相关研究，以解决中层和较低热球（MLT）动力学的新挑战，并通过碰撞相互作用扩展了对离子层血浆与中性大气的相互作用的持续研究。该系统将能够在高垂直分辨率和临时节奏下测量三维风，中性温度和钠密度剖面，温度曲线的范围为30至115 km，范围为80至105 km的风轮廓。当中性NA处于较高的高度（可能是由于零星层的形成）时，风和温度观测值随后可将最高140 km延伸到较低的热层。这个前所未有的垂直测量范围将首次允许从启动的区域一直到他们死亡的区域。该设施还将代表培训年轻的光学工程物理学家的出色手段，这些手段将非常适合学术界和工业研究中的许多可能的职业道路。该研究的主要科学目标包括以下目标：1。重力波（GW）传播，折射，管道，能量和能量和动量运输在可变环境中，例如MLT对平流层变暖的响应，2。GW不稳定能量和动态驱动，动力，动量，构成和组成，以及组成的动力和组成，并混合了GW不稳定性的动态，并结合了3.潮汐和行星波，它们对这些磁场的影响以及海拔高度的波谱的演变，以及4。有助于对E区域中离子中性耦合的理解有助于提高。采用USU共振和瑞利激光雷达系统的研究将受益于位于洛根激光雷达部位附近的熊湖天文台的当前和待处理的测量能力。

项目成果

Solar Response and Long‐Term Trend of Midlatitude Mesopause Region Temperature Based on 28 Years (1990–2017) of Na Lidar Observations

• DOI: 10.1029/2019ja026759
• 发表时间: 2019-08
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: C. She;U. Berger;Zhaoai Yan;T. Yuan;F. Lübken;D. Krueger;Xiong Hu

Photochemistry on the bottom side of the mesospheric Na layer

中间层Na层底部的光化学

• DOI: 10.5194/acp-19-3769-2019
• 发表时间: 2019
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: Yuan, Tao;Feng, Wuhu;Plane, John M.;Marsh, Daniel R.
• 通讯作者: Marsh, Daniel R.