Analyses of Observed Magnetic Field Characteristics for the Understanding of Solar Eruptions Physics Using a Data-Driven Three-Dimensional Magnetohydrodynamic (3D MHD) Model

首席研究员将根据他最近开发的3D MHD太阳活动区（AR）演化模型模拟太阳爆发，该模型由实际观测驱动。新模型在模拟AR8100活跃区的非位磁场演化方面已经显示出前景。他将利用现有的光球测量来研究太阳爆发事件的潜在触发因素，以确定导致太阳爆发的因素。具体来说，PI计划研究与活跃区域的磁结构和自由磁能有关的问题；磁通量的出现和淹没/消除对太阳喷发的影响通过光球的能量和螺旋通量对ar生长的贡献；以及太阳爆发的能量阈值。他还将对能量/螺旋通量和非势磁场参数的演变进行相关研究。首席研究员的新模型中最重要的创新是结合了实际的光球测量。此外，在模型中充分实现自洽和随时间变化的特征边界条件，以正确输入这些变化的光球观测值。PI指出，由亚光球和对流区动力学引起的影响将通过表面边界条件直接反映出来，因此他的模型将能够耦合亚光球和太阳日冕。该项目将支持一名研究生。PI将继续他在欧洲的多项合作，包括“美国-斯洛伐克空间天气”计划，该计划吸引了许多外国科学家和研究生，其中一些人最终来美国工作。“美国-斯洛伐克空间天气”项目已经在欧洲举行了几次年度研讨会，并得到了美国国家科学基金会国际科学与工程办公室（OISE）的支持。

The Principal Investigator will simulate solar eruptions based on his recently developed 3D MHD solar active region (AR) evolution model, which is driven by actual observations. The new model has already shown promise in reproducing the non-potential magnetic field evolution of an active region AR8100. He will investigate potential triggers for solar eruptive events using available photospheric measurements, in order to determine the factors contributing to the initiation of a solar eruption. Specifically, the PI plans to study issues related to the magnetic configuration and free magnetic energy of active regions; the effects of magnetic flux emergence and submergence/cancellation on solar eruptions; contributions of energy and helicity flux through the photosphere to the growth of ARs; and the energy threshold for solar eruption. He also will perform a correlative study of the evolution of energy/helicity flux and non-potential magnetic field parameters. The most important innovation in the Principal Investigator's new model is the incorporation of actual photospheric measurements. In addition, self-consistent and time-dependent characteristic boundary conditions are fully implemented in the model to correctly input these changing photospheric observations. The PI states that effects caused by sub-photospheric and convective zone dynamics will be directly reflected through the surface boundary conditions, and thus his model will be able to couple the sub-photosphere and the solar corona. A graduate student will be supported in this project. The PI will continue his multiple European collaborations, including a 'US-Slovak Space Weather' initiative, which attracts many foreign scientists and graduate students, some of whom eventually come to work in the US. The 'US-Slovak Space Weather' project has held several annual workshops in Europe and has received the support of the NSF Office of International Science & Engineering (OISE).