Dramatic increase in observational data flow from ground and space telescopes (e.g., SDO, IRIS, Hinode, Parker Probe, BBSO, etc.), as well as from upcoming observational facilities, such as the 4-meter solar telescope DKIST, provides unique opportunity to probe the solar dynamics from the interior to corona with high spatial and temporal resolution. At the same time it makes a great challenge to analyze the large multi-dimensional data sets, and to interpret the observed highly nonlinear processes. The modern data analysis involves detailed NLTE spectro-polarimetric diagnostics. Recent advances in 3D radiative modeling make it possible to reproduce the dynamics of subsurface magnetoconvection layers and the solar atmosphere with a high degree of realism, providing tools for physics-based interpretation of observational data. In current state of the field, cross-validation and verification of numerical models, data analysis techniques, and physical interpretation of detected features become extremely important. The goal of the working group is to create a platform for interaction of observers, data analysts and modelers to identify key points and challenges that need to be addressed for advancing the knowledge of physical processes on the Sun, which control the solar energy output and magnetic activity. The working group activities will include discussions of the current challenges, new ways to efficiently resolve them, promoting cross-disciplinary activity, establishing collaborations, writing white papers and research proposals.

Founding working group members: Irina Kitiashvili (NASA Ames/BAERI), Serena Criscuoli (NSO), Alexander Kosovichev (NJIT)