Surface Semi-Geostrophic Dynamics: mixing from local to nonlocal dynamics

表面半地转动力学：从局部动力学到非局部动力学的混合

• 批准号: 399869321
• 负责人: Professor Dr. Gualtiero Badin
• 金额: --
• 依托单位: Institut für Meereskunde (IMee)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/399869321?language=en
• 关键词: Surface; Semi; Geostrophic; Dynamics; mixing

Observational and numerical works show that the ocean displays a significant presence of dynamics at scales smaller than the mesoscale. Understanding the properties of these dynamics and their role in the turbulent transfer and mixing of properties such as heat, nutrients and pollutants is important for the correct parameterization of mixing in climate models. In this project we aim to study the lateral mixing in the ocean by submesoscale dynamics, in particular by ageostrophic eddies produced at boundaries, using the semi-geostrophic approximation. Numerical experiments of surface semi-geostrophic turbulence will be performed in order to study the stirring and mixing of passive tracers. Different experiments at different Rossby numbers will be performed to study the effects of the frontal dynamics on the dispersion of the tracer. Results will be compared with other classic turbulence models, such as the surface quasi-geostrophic approximation.

观测和数值工作表明，海洋在比中尺度更小的尺度上表现出显著的动力学存在。了解这些动力学的性质及其在热量、营养物质和污染物等性质的湍流传输和混合中的作用，对于气候模式中混合的正确参数化是很重要的。在这个项目中，我们旨在利用半地转近似，通过次中尺度动力学，特别是通过在边界产生的非地转涡来研究海洋中的横向混合。为了研究被动示踪剂的搅拌和混合，将进行地面半地转湍流的数值试验。在不同的Rossby数下进行不同的实验，以研究锋面动力学对示踪剂扩散的影响。结果将与其他经典湍流模型，如地表准地转近似进行比较。

项目成果

Collapse of generalized Euler and surface quasigeostrophic point vortices.

• DOI: 10.1103/physreve.98.023110
• 发表时间: 2018-05
• 期刊: Physical review. E
• 作者: G. Badin;A. Barry

Statistical Measures and Selective Decay Principle for Generalized Euler Dynamics: Formulation and Application to the Formation of Strong Fronts

广义欧拉动力学的统计测量和选择性衰变原理：强锋面形成的公式和应用

• DOI: 10.1007/s10955-019-02472-4
• 发表时间: 2020
• 期刊: Journal of Statistical Physics
• 影响因子: 1.6
• 作者: G. Conti;G. Badin
• 通讯作者: G. Badin

Asymptotic scale-dependent stability of surface quasi-geostrophic vortices: semi-analytic results

表面准地转涡旋的渐近尺度相关稳定性：半解析结果

• DOI: 10.1080/03091929.2018.1453930
• 发表时间: 2019
• 期刊: Geophysical & Astrophysical Fluid Dynamics
• 影响因子: 1.3
• 作者: G. Badin;F.J. Poulin
• 通讯作者: F.J. Poulin

Velocity statistics for point vortices in the local α-models of turbulence

湍流局部 α 模型中点涡的速度统计

• DOI: 10.1080/03091929.2019.1572750
• 发表时间: 2019
• 期刊: Geophysical & Astrophysical Fluid Dynamics
• 影响因子: 1.3
• 作者: G. Conti;G. Badin
• 通讯作者: G. Badin