Collaborative Research: Comprehensive Corona and Heliosphere Model (CCHM)

这里的合作者打算开发和维护一个基于第一性原理的综合数值代码，被称为综合日冕和日光层模型（CCHM）。CCHM将模拟缓慢变化的日冕和周围太阳风的三维随时间变化的结构和动力学，它将基于空间天气建模框架，这是密歇根大学开发的一种灵活的高性能计算工具。利用CCHM，提议团队将与社区协调建模中心（CCMC）、NOAA空间环境中心（SEC）和太阳-日光层社区合作，扩展可用的物理模型，协助研究人员使用新功能，验证单个模型，并计算预测技能分数。CCHM模式的主要特点是：(i)在任何给定时刻对日冕和日球层的大尺度结构和性质进行三维定量描述；（ii）将目前可用的和即将提供的视距光球磁场数据以及矢量磁场观测作为模式输入；（iii）能够引发简单的瞬变，以及复杂的磁场驱动的太阳喷发；（iv）对空间中某一点或某一物体（地球、火星、宇宙飞船）随时间变化的太阳风参数和高能粒子环境的预测；(v)足够的模块化，以纳入包含新的或更复杂物理的例程；（vi）一个用户友好的门户网站，用于创建、提交、监控和分析一般研究界的模型运行（包括图形）；（vii）在合理的计算资源上的超实时能力，为快速周转运行提供灵活性；（viii）以“管道模式”连续运行并描述太阳磁场连续拓扑变化的能力（只要有来自太阳和日光层天文台/迈克尔逊多普勒成像仪（SoHO/MDI）、太阳天气光学长期调查（SOLIS）和太阳动力学天文台/日震和磁成像仪（SDO/HMI）的连续数据流可用）。在项目的整个生命周期内，主要研究人员将积极评估和验证CCHM。

The collaborators here intend to develop and maintain a first-principles-based comprehensive numerical code, to be called the Comprehensive Corona and Heliosphere Model (CCHM). The CCHM will simulate the 3D time-dependent structure and dynamics of the slowly varying corona and the ambient solar wind, and it will be based on the Space Weather Modeling Framework, a flexible high-performance computational tool developed at the University of Michigan. Using the CCHM, the proposing team will expand available physics models, assist researchers in using new capabilities, validate individual models, and calculate prediction skill scores, in partnership with the Community Coordinated Modeling Center (CCMC), NOAA Space Environment Center (SEC), and the Solar-Heliospheric Community.The main features of the CCHM model will be: (i) a 3D quantitative description of the large scale structure and properties of the corona and the heliosphere at any given instant in time; (ii) the incorporation of presently available and forthcoming line-of-sight photospheric magnetic field data, as well as vector magnetic field observations, as model input; (iii) the ability to initiate simple transients, as well as sophisticated magnetically-driven solar eruptions; (iv) predictions of time-dependent solar wind parameters and the energetic particle environment at a point or an object (Earth, Mars, spacecraft) in space; (v) sufficient modularity to incorporate routines containing new or more sophisticated physics; (vi) a user-friendly web portal to create, submit, monitor, and analyze model runs (including graphics) by the general research community; (vii) faster-than-real-time capability on reasonable computational resources, yielding the flexibility for quick-turn-around runs; (viii) the ability to run continuously in a 'pipeline mode' and to describe continuous topological changes of the solar magnetic field (as long as continuous data streams from Solar and Heliospheric Observatory/Michelson Doppler Imager (SoHO/MDI), Synoptic Optical Long-term Investigations of the Sun (SOLIS), and eventually Solar Dynamics Observatory/Helioseismic and Magnetic Imager (SDO/HMI) are available). The Principal Investigators intend to be active in evaluating and validating the CCHM throughout the lifetime of the project.