Utilising low frequency dynamics to improve time-stepping capabilities in weather and climate models

利用低频动态提高天气和气候模型的时间步进能力

• 批准号: 2405974
• 金额: --
• 依托单位: UNIVERSITY OF EXETER
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2405974
• 关键词: Utilising; low; frequency; dynamics; improve

When a bell is struck, its shape creates resonances that produce its primary strike-tone and harmonic spectra. A central question explored in this project is how nonlinear resonance in fluids, rather than in solids, create low frequency, long-lasting dynamical patterns or 'mean' flows, as well as characterizing their evolution and life cycles.The student will explore the mathematical nature of resonance in fluids, primarily with applications to the atmosphere, ocean, and magnetic field in idealized configurations. In particular the project will seek to understand how nonlinear oscillations give rise to low-frequency mean flows in time-scale separated phenomenon. What creates nonlinear resonance in fluids? How does it depend on the parameters of the physics such as background ocean stratification or magnetic field?This project will involve a combination of theoretical fluid dynamics, numerical analysis and simulation to seek answers to these questions. The student will choose the direction of the project in consultation with the supervisor Professor Beth Wingate.

当一个钟被敲击时，它的形状产生共振，产生它的主要打击音调和谐波频谱。本项目的核心问题是流体中的非线性共振如何产生低频、持久的动力学模式或“平均”流动，以及它们的演化和生命周期。学生将探索流体中共振的数学本质，主要应用于理想化配置中的大气、海洋和磁场。特别是，该项目将寻求了解非线性振荡如何引起时间尺度分离现象中的低频平均流。是什么在流体中产生非线性共振？它如何依赖于物理参数，如背景海洋分层或磁场？该项目将涉及理论流体动力学，数值分析和模拟相结合，以寻求这些问题的答案。学生将选择与主管贝丝·温盖特教授协商项目的方向。