CAREER: Quantifying the Dynamics and Spatiotemporal Variability of Blocking Events Using Linear Response Functions and the Buckingham-Pi Theorem

职业：使用线性响应函数和 Buckingham-Pi 定理量化阻塞事件的动力学和时空变化

基本信息

批准号：
2046309
负责人：
Pedram Hassanzadeh
金额：
$ 73.5万
依托单位：
William Marsh Rice University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-04-15 至 2026-03-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2046309&HistoricalAwards=false
关键词：
CAREER Quantifying Dynamics Spatiotemporal Variability

项目摘要

An atmospheric blocking event describes the occurrence of a large-scale, quasi-stationary, high-pressure system that persists between 5 days to a few weeks in the extratropics. Its appearance diverts the jet stream flow (altering nearby weather) and can contribute to extreme events like heat waves and droughts. Predicting blocking events is difficult. Our understanding of blocking events is poor, and complete theory for blocking still does not exist. The outcome of this project will advance our knowledge of blocking, which will enhance our capabilities to better forecast midlatitude weather extremes and project the response of blocking to climate change. In addition to training doctoral students, the project will develop (1) a Research Experiences for Teachers (RET) program with workshops focused on developing innovative teaching materials on climate science, and (2) a course to educate college students from non-geoscience quantitative majors about climate science.Specifically, this proposal seeks to understand blocking dynamics and their spatiotemporal variability as well as their response to climate change. The research objectives are to: (1) assess the role of positive eddy-blocking feedback mechanism in blocking persistence, (2) evaluate the impact of large-scale circulation on blocking characteristics, (3) examine the impact of climate change to blocking, and (4) investigate the roles of latent heating in the previous objectives. The research approach includes an innovative use of the linear response function theory, Buckingham-pi scale analysis, and wavelet analysis in a hierarchy of models, from dry/moist two-layer quasi-geostrophic to dry/moist idealized general circulation models (GCMs) to large-ensemble simulations from fully coupled GCMs. The RET program will provide 7 research positions for high-school science teachers, who will develop introductory lessons on climate change. These lessons will be shared with 100s of science teachers through workshops and other venues and will be taught to 10000s of Houston public school students, many from the underrepresented groups. The developed class will result in novel materials for introducing climate science/research to a broad group of STEM students, strengthening efforts aimed at training a skilled future workforce in climate science.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.

大气阻塞事件描述了在温带地区出现了持续 5 天到几周的大规模准静止高压系统。它的出现会改变喷射流的方向（改变附近的天气），并可能导致热浪和干旱等极端事件。预测阻塞事件很困难。我们对阻塞事件的理解很差，并且完整的阻塞理论仍然不存在。该项目的成果将增进我们对阻塞的了解，从而增强我们更好地预测中纬度极端天气并预测阻塞对气候变化的响应的能力。除了培养博士生外，该项目还将开发（1）一个教师研究经验（RET）计划，其中包括专注于开发气候科学创新教材的研讨会，以及（2）一门对大学生进行非地球科学定量教育的课程具体来说，该提案旨在了解阻塞动态及其时空变化以及它们对气候变化的响应。研究目标是：（1）评估正涡流阻塞反馈机制在阻塞持续性中的作用，（2）评估大范围环流对阻塞特征的影响，（3）检查气候变化对阻塞的影响， (4) 研究潜热加热在先前目标中的作用。研究方法包括在模型层次中创新地使用线性响应函数理论、Buckingham-pi 尺度分析和小波分析，从干/湿两层准地转模型到干/湿理想化大气环流模型 (GCM)到完全耦合 GCM 的大型系综模拟。 RET 项目将为高中科学教师提供 7 个研究职位，他们将开发有关气候变化的入门课程。这些课程将通过研讨会和其他场所与数百名科学教师分享，并将教授给数万名休斯顿公立学校的学生，其中许多来自代表性不足的群体。开发的课程将产生新颖的材料，用于向广大 STEM 学生介绍气候科学/研究，加强旨在培养气候科学领域熟练的未来劳动力的努力。该奖项反映了 NSF 的法定使命，并通过评估被认为值得支持利用基金会的智力优势和更广泛的影响审查标准。