CEDAR: Understanding Day-to-Day Tidal Variability

CEDAR：了解日常潮汐变化

• 批准号: 1552286
• 负责人: Scott Palo
• 金额: $ 38.17万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-04-01 至 2021-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1552286&HistoricalAwards=false
• 关键词: CEDAR; Understanding; Day; Tidal; Variability

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.

多变性是中间层低热层系统（80至120公里之间的区域）的一个主要特征，这种多变性的来源还不是很清楚。 在这一地区可以看到两种类型的大气波活动：称为重力波（GW）的短波和称为潮汐波的长波。 该奖项工作计划的科学重点是提高对MLT地区产生短期潮汐波变化的可能物理机制的理解。 特别强调在这个奖项的研究将放在了解重力波的变化产生的潮汐传播和潮汐波耗散特性的变化的作用。预期对空间气象界的广泛影响沿着对空间气象研究和教育宣传（包括K12和代表性不足的群体）的影响是极好的，特别是因为描述和了解短期潮汐变化的研究目标提供了预测性空间气象建模者急需的信息，这是技术社会的一项重要任务，正如十年调查所强调的那样。 受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完善的计划，通过科罗拉多大学（博尔德）BOLD计划，为高中生提供暑期课程，让代表性不足的群体参与，加强K-12 STEM教育。 首席研究员有通过类似项目指导学生的成功历史。该奖项将使用来自TIMED组合的观测结果分析和量化MLT区域昼夜迁移潮汐的短期变化（热层，电离层，中间层能量学和动力学）和Aura/NASA卫星数据库，并结合COSMIC确定的观测电离层响应测量结果气象、电离层和气候星座观测系统（Constellation Observing System for Meteorology，Ionosphere，and Climate）。在这项研究中，将解决两个问题：第一个是识别的物理机制，驱动短期的一天到一天的变化的迁移昼夜潮。 第二个问题是关于迁移的昼夜潮汐的逐日变化对中间层-热层-电离层系统的总体影响。这些观测诊断将得到CEDAR数据库中的流星雷达风的支持。

项目成果

Day‐to‐Day Variability of Diurnal Tide in the Mesosphere and Lower Thermosphere Driven From Below

• DOI: 10.1029/2019ja027759
• 发表时间: 2021-02
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: Jack C. Wang;S. Palo;Han L. Liu;D. Siskind