Modelling of targeted regional climate phenomena and diagnostics of atmospheric energetics

目标区域气候现象建模和大气能量学诊断

• 批准号: RGPIN-2018-04208
• 负责人: Laprise, René
• 金额: $ 5.68万
• 依托单位: Université du Québec à Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=692019
• 关键词: Modelling; targeted; regional; climate; phenomena

***The proposed research programme aims at furthering the understanding of the physical processes affecting regional climate, including the atmospheric dynamics and its natural variability, and the associated changes resulting from the anticipated global warming of anthropogenic origin. The research programme is articulated around two complementary lines of investigation: Detailed energetics analysis of storms in recent past and projected warmer world, and event-based very high resolution regional climate modelling.******Along a first axis of research, innovative atmospheric energetic calculations will be performed on analyses of observations and high-resolution climate model historical simulations and future projections. Diagnostic energetic studies constitute complementary tools to climate modelling for probing the Earth's climate system and understanding the physical processes responsible for its maintenance, fluctuations and evolution under changing forcing. It is proposed to carry detailed atmospheric energetic budget over selected storm tracks, based on the novel approach of available enthalpy (AE) that, unlike the better-known available potential energy (APE) approach proposed by Lorenz, is applicable locally, and hence is suited for the study of individual storms. Confident in the robustness of the AE approach based on our recent work, we propose to carry detailed energetics of the life cycle of storms that have occurred in recent past and compare these with those that are projected for the future under anthropogenic warming. ******The second axis of research aims at designing an efficient simulation protocol to achieve regional climate projections of unprecedented high resolution, at an affordable computational cost on today's supercomputers. By carrying a cascade of telescoping grids in which the very high resolution is only activated for the events of the selected process under study, computing savings of one to two orders of magnitude will be achieved. The saving could then be reinvested in performing unprecedented detailed climate simulations on the current generation of supercomputers. These findings will pave the way for the next generation of Regional Climate Models with improved approaches for achieving very high-resolution climate simulations at an affordable computational cost.******The results of this research programme will provide the scientific basis and technological framework for performing and interpreting high-resolution climate projections for the next decade. In turn these results will feed information-based decisions for the development of adaptation measures to reduce the vulnerability of Canadians to anticipated regional impacts of anthropogenic global climate changes.

***拟议的研究计划旨在进一步理解影响区域气候的物理过程，包括大气动态及其自然变异性，以及由预期的人为起源的全球变暖引起的相关变化。该研究计划围绕两个互补的调查列表：近期和预计温暖世界的暴风雨的详细能量分析，以及基于事件的非常高的分辨率区域气候建模。******沿着第一轴的第一轴研究，创新的大气能量计算将在观察和高分辨率的气候模型模型的分析上进行，并进行。诊断能量研究构成了用于探测地球气候系统的气候建模的互补工具，并了解了负责其维护，波动和进化的物理过程，并在变化的强迫下进行了进化。根据可用的焓（AE）的新方法，与洛伦兹（Lorenz）提出的新型焓（AE）的新方法相比，它提议在选定的风暴轨道上携带详细的大气能量预算，而这些方法与洛伦兹（Lorenz）提出的较知名的可用势能（APE）方法不同，因此适用于研究单个风暴的研究。根据我们最近的工作，我们对AE方法的鲁棒性充满信心，我们建议携带近期发生的风暴生命周期的详细能量，并将其与在人为变暖下预测未来预测的风暴。 *****第二个研究轴旨在设计有效的仿真协议，以实现前所未有的高分辨率的区域气候预测，以负担得起的计算成本对当今的超级计算机的负担得起。通过携带一系列伸缩网格，其中仅针对所研究过程的事件激活了非常高的分辨率，将实现计算一到两个数量级的计算节省。然后可以将节省重新投资于对当前一代超级计算机的前所未有的详细气候模拟。这些发现将为下一代的区域气候模型铺平道路，并采用改进的方法以负担得起的计算成本来实现非常高分辨率的气候模拟。****** ******该研究计划的结果将为下一个十年的高分辨率气候预测提供科学基础和技术框架。反过来，这些结果将为基于信息的决策提供基于信息的决策，以制定适应措施，以减少加拿大人对人为全球气候变化的区域影响的脆弱性。