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.

这是北半球的作战和雷利激光雷达系统（犹他州洛根）。通过碰撞相互作用的中性大气将能够测量三维风，中性温度和钠的临时速度，范围为30至115 km，范围为80至105 km由于零星层的形成）随后，风和温度观测可以延伸至140 km，直至较低的热层。该设施还代表了培训的出色手段。例如，不稳定动力和动量沉积，胸骨，热量，热量，动量和征兵运输和混合，3。理解GWS与潮汐和行星波的相互作用E区域中的耦合耦合。

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.