CEDAR: Characterization of Upper Atmospheric Effects of Hurricanes

CEDAR：飓风高层大气影响的特征

• 批准号: 2330046
• 负责人: Erdal Yigit
• 金额: $ 42.54万
• 依托单位: George Mason University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-02-01 至 2027-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2330046&HistoricalAwards=false
• 关键词: CEDAR; Characterization; Upper; Atmospheric; Effects

Hurricanes are among the most powerful recurring weather events and play a crucial role in redistributing atmospheric energy. This project will study hurricane-induced changes in the upper atmosphere, tens of kilometers above the Earth’s surface. Satellite observations as well as mathematical models will be used to characterize the impact of hurricanes on the atmosphere by quantifying changes in winds, temperature, and atmospheric waves in unprecedented detail. Gaining a better understanding of atmospheric changes caused by hurricanes has important benefits for both the scientific community and the general public. This research can contribute to space-born hurricane prediction and inform efforts to mitigate the potential impacts of these disastrous events on human activities and technological systems. The activities will benefit Science Technology Engineering and Math (STEM) education within and beyond George Mason University. This project will support a graduate student and provide summer internships to several undergraduate students. The research material produced in this project will be integrated into various courses taught by the PI and will be shared on a website with the broader community. The PI and the graduate student plan on visiting a local community college to promote science. This project is an observational and modeling study of hurricane-induced changes in the upper atmosphere. A suite of satellite observations from COSMIC-2, ICON, GOLD, and TIMED will be used to characterize variations in neutral temperature, horizontal winds, O/N2, and electron density in the thermosphere-ionosphere during hurricanes, and to quantify the associated Gravity Wave (GW) activity. To aid the interpretation of the observed behavior of the large-scale atmosphere GW activity during hurricanes, the team will perform general circulation model simulations from the tropopause to the thermosphere, driven by MERRA-2 lower boundary forcing and incorporating subgrid-scale gravity waves. Overall, this work aims to offer meaningful insight into hurricane-induced vertical coupling between the lower and upper atmosphere. Topics under study include (1) the influence of hurricanes on the mean structure and variability of the thermosphere, (2) the characterization of gravity wave activity during hurricanes, and (3) propagation, dissipation of gravity waves and the resulting dynamical and thermal effects in the thermosphere during hurricanes. The observational work could be useful in helping refine the procedure of retrieving GW signatures as a proxy for hurricane intensity evolution in the upper atmosphere.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

飓风是最强大的周期性天气事件之一，在重新分配大气能量方面发挥着至关重要的作用。该项目将利用卫星观测和数学模型来研究飓风引起的距地球表面数十公里的高层大气的变化。通过以前所未有的细节量化风、温度和大气波的变化来表征飓风对大气的影响，更好地了解飓风引起的大气变化对科学界和公众都有重要的好处。有助于这些活动将有利于乔治梅森大学内外的科学技术工程和数学（STEM）教育。该项目中产生的研究材料将整合到 PI 教授的各种课程中，并将在网站上与更广泛的社区共享 PI 和研究生访问当地的计划。社区学院旨在促进科学发展，该项目是一个观察性项目。飓风引起的高层大气变化的建模研究将使用 COSMIC-2、ICON、GOLD 和 TIMED 的一系列卫星观测来表征中性温度、水平风、O/N2 和电子密度的变化。飓风期间的热层-电离层，并量化相关的重力波（GW）活动为了帮助解释飓风期间观测到的大规模大气重力波活动，该团队将从对流层顶进行大气环流模型模拟。总体而言，这项工作旨在对飓风引起的低层和高层大气之间的垂直耦合提供有意义的见解。飓风对热层平均结构和变化的影响，(2) 飓风期间重力波活动的特征，以及 (3) 重力波的传播、耗散以及由此产生的热层动力和热效应观测工作有助于完善检索 GW 特征的程序，作为高层大气中飓风强度演变的代理。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和技术进行评估，被认为值得支持。更广泛的影响审查标准。