Collaborative Research: Quantification of Gravity Wave Momentum Fluxes and Instability Events in the Mesosphere and Lower Thermosphere (MLT) Region at High- and Mid- Latitudes

合作研究：高、中纬度中层和低热层（MLT）区域重力波动量通量和不稳定事件的量化

• 批准号: 1449633
• 负责人: David Fritts
• 金额: $ 4万
• 依托单位: GLOBAL ATMOSPHERIC TECHNOLOGIES AND SCIENCES, INC.
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1449633&HistoricalAwards=false
• 关键词: Collaborative; Research; Quantification; Gravity; Wave

This project involves comprehensive observational studies, guided by state-of-the-art modeling, to quantify gravity wave (GW) momentum transport and the instability dynamics that drive energy and momentum deposition and GW spectral evolution in the mesosphere and lower thermosphere (MLT) region. The observations will build on recent successes by this team employing an Advanced Mesosphere Temperature Mapper (AMTM), the Weber Wind and Temperature sodium lidar, and other correlative instrumentation operated at the Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR) in northern Norway (69.3oN). These earlier correlative measurement capabilities have demonstrated an excellent potential to quantify GW momentum fluxes, and the GW characteristics that account for these fluxes, to a degree not possible with traditional airglow imagers or wind profiling radars or lidars. As such, this program represents a new frontier in the community's ability to measure, explore and understand small-scale GW and instability dynamics in the MLT that directly impact the Space-Atmospheric Interaction Region (SAIR) of prime importance to the NSF Aeronomy and CEDAR programs. These studies will continue to employ the high-quality correlative wintertime measurement capabilities at ALOMAR and will include extensive summertime Na lidar and AMTM measurement capability recently available at Bear Lake Observatory (BLO) and the nearby Utah State University (USU) campus (41.9oN). Together these two data sets will provide an excellent measure of the different geophysical forcing effects on the high- and mid-latitude MLT region. These facilities provide the best potential for multiple correlative data sets, given the on-site access to lidar operators. These proven measurement capabilities will also facilitate estimates of the spatial and temporal scales of the GW packets, accounting for mean forcing and the generation of secondary GWs, which are largely unknown at present, but are needed for understanding and parameterizing GW effects in weather, climate, and general circulation models addressing both research and societal needs. The measurements from these two stations, if successful, will provide the necessary inputs for a realistic model development.

该项目涉及以最先进的建模为指导的全面观察性研究，以量化重力波（GW）动量转运以及驱动中层和下热圈（MLT）区域中能量和动量沉积和GW光谱演化的不稳定动力学。这些观察结果将基于该团队的最新成功，该团队采用了高级层层温度映射器（AMTM），韦伯风和温度钠激光钠和其他相关仪器在北极激光雷达天文台进行的中间大气研究（ALOMAR）在北部北部北部Enthern Norway（69.3On）进行。这些早期的相关测量能力表现出了量化GW动量通量的巨大潜力，以及用于这些通量的GW特性，而传统的气流成像仪或风谱雷达或激光雷达或激光雷达则不可能。因此，该计划代表了社区在MLT中测量，探索和理解小规模的GW和不稳定动态的能力的新领域，直接影响了对NSF航空公司和CEDAR计划的主要重要性的空间 - 大气相互作用区域（SAIR）。 这些研究将继续采用Alomar的高质量相关冬季测量能力，并将包括最近在Bear Lake Observatory（BLO）以及附近犹他州大学（USU）校园（41.9on）提供的广泛的夏季Na Lidar和AMTM测量能力。这两个数据集将共同提供对高纬度和中纬度MLT区域的不同地球物理强迫效应的极好度量。考虑到对激光雷达运营商的现场访问，这些设施为多个相关数据集提供了最佳潜力。这些经过验证的测量能力还将促进GW数据包的空间和时间尺度的估计，考虑到平均强迫和二次GWS的产生，这些二次GWS目前在很大程度上尚不清楚，但要理解和参数化GW在天气，气候以及一般循环模型中的GW效应以及解决研究和社会需求的一般循环模型。如果成功的话，这两个站点的测量将为现实的模型开发提供必要的输入。