Collaborative Research: SHINE: Driving Solar Magnetohydrodynamic (MHD) Simulations with Vector Magnetogram Sequences

合作研究：SHINE：用矢量磁图序列驱动太阳能磁流体动力学 (MHD) 模拟

• 批准号: 0551084
• 负责人: George Fisher
• 金额: --
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-05-01 至 2011-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0551084&HistoricalAwards=false
• 关键词: Collaborative; Research; SHINE; Driving; Solar

The PIs propose to collaborate in developing new techniques for measuring the state of the solar atmosphere and for solving the physical equations governing its evolution. The proposers plan to combine these capabilities so that numerical simulations might be directly driven by observed solar data. To accomplish this, they intend to develop new methods of reducing solar vector magnetogram sequences, optimized for input into simulations as a self-consistent set of boundary conditions for a numerical solution. A semi-implicit code will be used to solve the compressible, time-dependent magnetohydrodynamic (MHD) equations subject to those initial conditions and boundary conditions. The end-to-end capability provided by these new methods will be demonstrated by performing data-driven simulations of at least three solar active regions. Decades of high-quality observations from ground-based and space-based instruments have led researchers to propose several different models for the origin and evolution of coronal mass ejections. Three-dimensional, time-dependent simulations can demonstrate the viability of these models, provided they are appropriately driven. However, only driving these simulations directly with data can identify the model that best describes reality. This proposal will develop the necessary techniques to perform such a test, and will contribute to the development of a national space weather forecasting capability, which will assimilate ongoing observations into large-scale computer simulations that solve the governing equations. All tools developed under this effort will be made available to the solar physics community and to the public.

PIS提议合作开发新的技术来测量太阳大气的状态，并解决控制其演变的物理方程。提出者计划将这些能力结合起来，这样数值模拟就可以直接由观测到的太阳数据驱动。为了实现这一点，他们打算开发新的方法来减少太阳矢量磁图序列，优化后的序列作为一组自洽的边界条件输入到模拟中，用于数值解。在这些初始条件和边界条件下，将使用半隐式程序来求解可压缩的时变磁流体力学(MHD)方程。这些新方法提供的端到端能力将通过对至少三个太阳活动区进行数据驱动的模拟来展示。几十年来，来自地面和天基仪器的高质量观测使研究人员提出了几种不同的日冕物质抛射起源和演化模型。三维的、与时间相关的模拟可以证明这些模型的可行性，只要它们被适当地驱动。然而，只有直接用数据驱动这些模拟，才能确定最能描述现实的模型。这项提议将开发进行这种试验所需的技术，并将有助于发展国家空间天气预报能力，这将把正在进行的观测同化为求解控制方程的大规模计算机模拟。在这项努力下开发的所有工具都将向太阳物理界和公众提供。