Karel Schrijver's work focuses on understanding of the Sun's magnetic activity. His research includes the dispersal of magnetic field across the solar surface and how that shapes the quiescent solar wind throughout the heliosphere, as well as solar eruptions and explosions that are the drivers of severe space storms around Earth. He continues to be interested in how we can learn about the Sun by observing other Sun-like stars, and vice versa. He is currently the Principal Investigator of the Atmospheric Imaging Assembly (AIA) onboard the NASA Solar Dynamics Observatory, and is co-investigator on the Interface-Region Imaging Spectrograph (IRIS), a NASA Small Explorer. He is motivated by his curiosity into the workings of the local cosmos as well as by the societal relevance of Sun-Earth connections.