Zhang, JieHess, Phillip2016-04-192016-04-192015https://hdl.handle.net/1920/10180A Coronal Mass Ejection (CME) is an eruption of magnetized plasma from the Coronaof the Sun. Understanding the physical process of CMEs is a fundamental challenge in solarphysics, and is also of increasing importance for our technological society. CMEs are knownthe main driver of space weather that has adverse effects on satellites, power grids, com-munication and navigation systems and astronauts. Understanding and predicting CMEs is still in the early stage of research. In this dissertation, improved observational methods and advanced theoretical analysis are used to study CMEs.116 pagesenCopyright 2015 Phillip HessAstronomyPhysicsAstrophysicsCoronal Mass EjectionSolar PhysicsSolar WindSpace WeatherSunDissertation