EAGER: Impacts of Fundamental Understanding of Atmospheric Energetics and Non-local Eddies on Frontier Atmospheric Research

EAGER：大气能量学和非局域涡流的基本理解对前沿大气研究的影响

• 批准号: 2203248
• 负责人: Jielun Sun
• 金额: $ 27.47万
• 依托单位: NorthWest Research Associates, Incorporated
• 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: 2021-11-15 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2203248&HistoricalAwards=false
• 关键词: EAGER; Impacts; Fundamental; Understanding; Atmospheric

This project is supported under the auspices of the EArly Concept Grant For Exploratory Research (EAGER) program. The project generally seeks to investigate two outstanding fundamental issues at the frontier of atmospheric science: 1) understanding atmospheric energetics; and 2) understanding the dominant role of non-local eddies in energy and momentum transfers across scales of atmospheric motions. The research strategy combines theoretical investigation, observational analyses, and modeling in an effort to better inform theoretical aspects of atmospheric processes that are validated by observations and confirmed by numerical models.The researcher will pursue two specific objectives for the project. The first objective aims to constrain atmospheric energetics under the influence of diabatic heating and cooling by analyzing existing field observations with a focus on non-hydrostatic energy transfer. The second objective seeks to develop a one-dimensional model based on energy conservation laws and physically-based surface conditions for capturing non-local eddies in energy and momentum transfers. It is suggested to achieve this objective without parameterizing turbulent mixing and investigating impacts of non-hydrostatic energy transfer on atmospheric dynamics and thermodynamics with validation using boundary-layer field observations over a range of atmospheric instabilities through the diurnal cycle.The potential Broader Impacts include challenging scientific orthodoxy and seeking to better understand fundamental atmospheric physics that governs atmospheric dynamics and thermodynamics. This is critical to addressing a range of atmospheric phenomena strongly influenced by diabatic heating and cooling such as convective systems (hurricanes, tropical cycles, tornado genesis) and stable boundary layers when non-hydrostatic energy transfer is potentially strong.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.

该项目得到了探索性研究早期概念基金(EARGER)的支持。该项目一般致力于研究大气科学前沿的两个悬而未决的基本问题：1)了解大气能量学；2)了解非局地涡旋在大气运动尺度上的能量和动量传递中的主导作用。该研究策略结合了理论研究、观测分析和建模，以努力更好地提供大气过程的理论方面的信息，这些方面得到了观测的验证和数值模型的确认。研究人员将为该项目追求两个具体目标。第一个目标是通过分析现有的现场观测，重点放在非静力能量转移上，限制非绝热加热和冷却影响下的大气能量学。第二个目标是建立一个基于能量守恒定律和物理表面条件的一维模型，用于捕捉能量和动量转移中的非局部涡流。为了实现这一目标，建议不对湍流混合进行参数化，也不对非静力能量转移对大气动力学和热力学的影响进行研究，并利用通过日循环对一系列大气不稳定进行的边界层场观测进行验证。潜在的更广泛的影响包括挑战科学正统观念和寻求更好地理解支配大气动力学和热力学的基本大气物理学。这对于解决一系列受到非绝热加热和冷却强烈影响的大气现象至关重要，例如对流系统(飓风、热带气旋、龙卷风的形成)和当非静力能量转移潜在地强烈时的稳定边界层。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。