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.

飓风是最强大的重复天气事件之一，在重新分配大气能量中起着至关重要的作用。该项目将研究飓风诱导的上层大气变化，高于地球表面几公里。卫星观测以及数学模型将用于以前所未有的细节来量化风，温度和大气波的变化来表征飓风对大气的影响。对飓风造成的大气变化有更好的了解对科学界和公众都有重要好处。这项研究可以促进出生的飓风预测，并为减轻这些灾难性事件对人类活动和技术系统的潜在影响提供努力。这些活动将使乔治·梅森大学（George Mason University）内外的科学技术工程和数学（STEM）教育受益。该项目将支持一名研究生，并为几位本科生提供夏季国际活动。该项目中生产的研究材料将集成到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和研究生计划访问当地社区大学以促进科学。该项目是对飓风诱导的上层大气变化的观察和建模研究。宇宙2，图标，金和时机的一组卫星观测套件将用于表征飓风期间热层层中中性温度，水平风，O/N2和电子密度的变化，并量化相关的重力波（GW）活性。为了帮助解释飓风期间大规模大气GW活动的观察到的行为，该团队将进行一般循环模型模拟模拟，从对流层顶到热圈，这是由Merra-2下边界强迫驱动的，并结合了亚网格规模的重力波。总体而言，这项工作旨在提供有意义的洞察力，以了解飓风引起的下层大气和上层大气之间的垂直耦合。 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 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的法定使命，并使用基金会的知识分子优点和更广泛的审查标准来评估，被认为是宝贵的支持。