CEDAR: Understanding Day-to-Day Tidal Variability

变率是中间层低层热层（MLT）系统（80 ~ 120 km区域）的一个主要特征，而这种变率的来源还不是很清楚。在这个地区可以看到两种类型的大气波活动：称为重力波（GW）的短波波和称为潮汐波的长波。这项奖励工作计划的科学重点是提高对在MLT区域产生短期潮汐波变率的可能物理机制的理解。该奖项的研究将特别强调理解重力波变率在潮汐传播和潮汐耗散特性中产生的变化所起的作用。预期对空间天气界的更广泛影响，以及对空间天气研究和教育推广的影响，包括K12和代表性不足的群体，都是极好的，特别是因为描绘和理解短期潮汐变化的研究目标代表了预测空间天气建模者非常需要的信息，这是技术社会的重要任务，正如十年调查所强调的那样。这项资助的研究将支持科罗拉多大学博尔德分校的一名研究生，其次，首席科学家描述了一项合理的计划，通过科罗拉多大学博尔德分校BOLD项目，在代表性不足的群体参与下，加强K-12 STEM教育，该项目为高中生提供暑期课程。首席研究员在通过类似项目指导学生方面有着成功的历史。该合同将利用TIMED（热层、电离层、中间层能量学和动力学）和Aura/NASA卫星数据库的观测数据，结合由COSMIC（气象、电离层和气候星座观测系统）数据确定的观测电离层响应测量数据，分析和量化MLT区域日迁移潮的短期变化。本研究将解决两个问题：第一个问题是确定驱动日潮迁移的短期日变化的物理机制。第二个问题是关于迁移日潮的日变率对中间层-热层-电离层系统的总体影响。这些观测诊断将得到CEDAR数据库中流星雷达风的支持。

Variability is a major characteristic of the mesosphere lower thermosphere (MLT) system (the region between 80 to 120 km), and the sources of this variability are not very well understood. There are two types of atmospheric wave activity seen in this region: short wavelength waves called gravity waves (GW) and long wavelength waves called tidal waves. The science focus of this award work plan is to achieve improved understanding of the possible physical mechanisms that generate short-term tidal wave variability in the MLT region. Particular emphasis in this award research would be placed upon understanding the role of gravity wave variability producing the resulting variations in tidal propagation and tidal wave dissipation characteristics. The expected broader impacts on the space weather community along with the implications for space weather research and educational outreach including K12 and under-represented groups are excellent, especially because the research objective of delineating and understanding short-term tidal variability represents information that is much needed for predictive space weather modelers, an important task for a technological society, as emphasized in the Decadal Survey. The funded research would support a graduate student at Colorado University, Boulder, and second, the lead scientist has described a sound plan to enhance K-12 STEM education with the participation of under-represented groups through the University of Colorado (Boulder) BOLD program, which provides summer courses for high school students. The Principal Investigator has a successful history of mentoring students through similar programs.This award would analyze and quantify the short-term variability of the diurnal migrating tide in the MLT region using observations derived from the combined TIMED (Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics) and Aura/NASA satellite databases combined with measurements of the observed ionospheric response determined from COSMIC (Constellation Observing System for Meteorology, Ionosphere, and Climate) data. Two questions would be addressed in this study: the first being the identification of the physical mechanisms that drive the short-term day-to-day variability of the migrating diurnal tide. The second question is concerned with the overall impact that the day-to-day variability of the migrating diurnal tide has upon the mesosphere-thermosphere-ionosphere system. These observational diagnostics would be supported by meteor radar winds that are in the CEDAR database.