Collaborative Research: Enabling Cloud-Permitting and Coupled Climate Modeling via Nonhydrostatic Extensions of the CESM Spectral Element Dynamical Core

合作研究：通过 CESM 谱元动力核心的非静水力扩展实现云允许和耦合气候建模

• 批准号: 2332468
• 负责人: Christiane Jablonowski
• 金额: $ 179.46万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-02-15 至 2027-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2332468&HistoricalAwards=false
• 关键词: Collaborative; Research; Enabling; Cloud; Permitting

Earth System Models (ESMs) are very computationally intensive to run, with components spanning the atmosphere, ocean, land, biosphere, and ice. These models are typically run at resolutions which are too coarse to explicitly represent weather systems like thunderstorm complexes, tropical cyclones, and terrain-forced precipitation. However, computing power is now sufficient to allow explicit simulation of these systems on a global domain using grid spacings of a few kilometers, albeit for simulations of weeks to months rather than the decades to centuries possible at lower resolutions. In this project, the research team will enhance the Community Earth System Model (CESM), led by the NSF National Center for Atmospheric Research (NCAR), with the capability to run as a Global Storm Resolving Model (GSRM). The GSRM version of CESM has tremendous potential as a tool for research on the weather-climate interface, particularly as CESM has a worldwide community of developers and users and is the primary model used by the US academic research community. As part of the project, multiple students and early career scientists would be trained at the intersection of atmospheric science and high-performance computing, enhancing a workforce that is crucially needed for scientific advancement.The main objective of the project is to lay the groundwork for simulations with CESM, which is comprised of individual models including the Community Atmosphere Model, for which version 7 (CAM7) is currently under development for release in 2024. CAM7's dynamical core uses the Spectral Element (SE) method to solve the equations of fluid motion under the hydrostatic approximation, in which the acceleration term is neglected in the vertical momentum equation. This project will port the nonhydrostatic SE dynamical core developed for the Department of Energy’s (DOE’s) Energy Exascale Earth System Model (E3SM) into CESM/CAM7. A second, more experimental version of the SE dynamical core meant to run on advanced computing architectures will also be ported. The researchers will then run CAM7 to test the ability to reproduce smaller-scale phenomena. Specifically, the project will: • Port DOE’s nonhydrostatic, Fortran-based, SE dynamical core into the CESM framework.• Integrate an experimental C++ version of the SE core into CESM with a GPU-enabled physics package from the NSF-funded EarthWorks project.• Test and demonstrate the capabilities of the new CESM configuration using mesoscale convective systems and tropical cyclones as exemplars.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.

地球系统模型（ESM）在计算中非常密集，其组件跨越了大气，海洋，土地，生物圈和冰。这些模型通常以太粗糙而无法明确表示诸如雷暴络合物，热带气旋和地形降水等天气系统的分辨率运行。但是，现在，计算能力足以使用几公里的网格间距在全球域上进行明确模拟，尽管在较低分辨率下进行了数周至数月的模拟，而不是数十年到几个世纪的模拟。在该项目中，研究团队将增强由NSF国家大气研究中心（NCAR）领导的社区地球系统模型（CESM），并能够作为全球风暴解决模型（GSRM）运行。 GSRM版本的CESM具有巨大的潜力作为研究天气气候界面的工具，尤其是因为CESM拥有一个全球范围内开发人员和用户社区，并且是美国学术研究社区使用的主要模型。作为项目的一部分，将在大气科学和高性能计算的交汇处进行培训，增强了科学进步完全需要的劳动力。该项目的主要目的是为与CESM进行模拟奠定基础，该项目由CAM7（CAM7）进行了204的“ cam7”（CAM7）的开发，该元素包括各个模型的单个模型。 （SE）在静水近似下求解流体运动方程的方法，其中加速度项在垂直动量方程中被忽略。该项目将向能源部（DOE）的Energy Exascale地球系统模型（E3SM）开发的非遗水SE动态核心将其移植到CESM/CAM7中。 SE动态核心的第二个实验版本也将移植到高级计算体系结构上。然后，研究人员将运行CAM7以测试复制较小规模现象的能力。具体而言，该项目将：•端口DOE的非液化性，基于Fortran的SE Dynamic Core进入CES​​M框架。 •通过NSF资助的Earterworks项目的启用GPU的物理包将SE Core的实验性C ++版本整合到CESM中。•测试并证明了使用中尺度对流系统和使用Tropical Cyclone的新CESM配置的功能，并具有典型的in Infortial the Infortial te Infortial of N.影响审查标准。