CEDAR: Understanding Day-to-Day Tidal Variability

可变性是中间层低热层(MLT)系统(80至120公里区域)的一个主要特征，而这种可变性的来源还不是很清楚。在该区域可以看到两种类型的大气波活动：称为重力波(GW)的短波和称为潮汐波的长波。该奖项工作计划的科学重点是更好地理解在MLT区域产生短期潮汐波动变率的可能物理机制。本奖项研究的重点将是了解重力波的可变性在潮汐传播和潮汐波耗散特性中产生的变化所起的作用。预期将对空间气象界产生更广泛的影响，并对空间气象研究和教育推广活动，包括K12和代表性不足群体产生影响，这是非常好的，特别是因为划定和了解短期潮汐变率的研究目标是预测空间气象模型人员所急需的信息，正如《十年调查》中强调的那样，这是技术社会的一项重要任务。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，这位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)BOLD计划加强K-12 STEM教育，让代表不足的群体参与，该计划为高中生提供暑期课程。首席研究人员有通过类似计划指导学生的成功历史。该奖项将使用来自TIMED(热层、电离层、中间层能量和动力学)和AURA/NASA卫星数据库的观测结果，并结合从COSMIC(气象学、电离层和气候星座观测系统)数据确定的观测电离层响应的测量，来分析和量化MLT区域的日迁移潮汐的短期变化。这项研究将涉及两个问题：第一个问题是确定驱动迁徙的日潮汐短期逐日变化的物理机制。第二个问题涉及迁徙的日潮逐日变化对中间层-热层-电离层系统的总体影响。这些观测诊断将得到雪松数据库中的流星雷达风的支持。

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.