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原理的综合数值代码，被称为综合日冕和日球层模型(CCHM)。CCHM将模拟缓慢变化的日冕和周围太阳风的3D随时间变化的结构和动力学，它将基于密歇根大学开发的灵活的高性能计算工具空间天气建模框架。利用CCHM，提议小组将与社区协调建模中心(CCMC)、NOAA空间环境中心(SEC)和太阳-日球层社区合作，扩展现有的物理模型，协助研究人员使用新的能力，验证个别模型，并计算预测技能分数。CCHM模型的主要特征是：(1)对任何给定时刻的日冕和日球层的大尺度结构和性质进行三维定量描述；(2)纳入目前和即将到来的视线光球层磁场数据以及矢量磁场观测，作为模型输入；(3)能够启动简单的瞬变以及复杂的磁力驱动的太阳喷发；(4)对空间中某一点或物体(地球、火星、航天器)的依赖时间的太阳风参数和高能粒子环境的预测；(5)充分的模块化，以纳入包含新的或更复杂的物理学的例程；(6)由一般研究界创建、提交、监测和分析模型运行(包括图形)的用户友好的门户网站；(7)对合理计算资源的比实时更快的能力，为快速周转运行提供了灵活性；(8)以“管道模式”连续运行和描述太阳磁场的连续拓扑变化的能力(只要来自太阳和日球层观测站/迈克尔逊多普勒成像仪(SOHO/MDI)、太阳天气光学长期调查(SOLIS)以及最终太阳动力学观测站/日震和磁成像仪(SDO/HMI)的连续数据流可用)。首席调查员打算在项目的整个生命周期内积极评价和验证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.