Fundamental Tropical Dynamics

基本热带动力学

基本信息

批准号：
1841326
负责人：
Wayne Schubert
金额：
$ 62.47万
依托单位：
Colorado State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-05-01 至 2023-04-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1841326&HistoricalAwards=false
关键词：
Fundamental Tropical Dynamics

项目摘要

This award is for the investigation and analysis of several topics related to the dynamics of tropical cyclones. The research team will use a combination of theory, numerical models, and observations to address longstanding questions, with a particular focus on tropical cyclone eyewall structures. The development of secondary eyewalls in tropical cyclones has a significant impact on the intensity of the storms and is a limiting factor on how well the intensity can currently be forecast. A successful project would lead to better understanding of the physics of the storms and how they can best be modeled, leading to an improvement in forecasts and public safety and economic benefits. In addition, the project will help to educate and train the next generation of research scientists.In this project, simplified dynamical theories will be developed using balanced model principles and potential vorticity arguments. The objectives of the proposal address the following fundamental research questions in tropical dynamics: 1) What is the distribution of subsidence in the hurricane eye? Is subsidence concentrated at the edge of the eye, thereby producing a warm-ring rather than a warm-core thermal structure? 2) Why is the ITCZ so thin, why does it form where it does, and what are its natural forms of oscillation? 3) Why do major hurricanes often form double eyewalls, what determines the locations of these eyewalls, and what dynamics are involved in the disintegration of the inner eyewall? 4) How do surface frictional effects in a moving hurricane break the circular symmetry of the eyewall and lead to crescent-shaped regions of intense eyewall convection?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.

该奖项用于研究和分析与热带气旋动态有关的几个主题。研究团队将使用理论，数值模型和观察结果的结合来解决长期存在的问题，并特别关注热带气旋的眼架结构。热带气旋中次生眼墙的发展对风暴的强度有重大影响，并且是预测强度的限制因素。一个成功的项目将使人们更好地了解风暴物理学以及如何最好地建模，从而改善预测，公共安全和经济利益。此外，该项目将有助于教育和培训下一代研究科学家。在该项目中，将使用平衡的模型原理和潜在的涡度论证来开发简化的动力学理论。该提案的目标涉及热带动力学中以下基本研究问题：1）飓风眼中沉降的分布是什么？沉降是否集中在眼睛的边缘，从而产生温暖的环而不是温核热结构？ 2）为什么ITCZ如此薄，为什么它会形成它的位置，以及它的自然振荡形式是什么？ 3）为什么主要的飓风通常会形成双眼墙，是什么决定这些眼墙的位置，以及内部眼墙瓦解涉及哪些动态？ 4）在移动飓风中，表面摩擦效应如何打破眼墙的圆形对称性，并导致新月形对流的新月形区域？该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的审查标准来通过评估来支持的。