This study analyzes GNSS data from Greenland stations to investigate the relationship between large-scale changes in total electron content (TEC) in the Arctic region and scintillations over Greenland. TEC, amplitude scintillation indices (S4), and phase scintillation indices (σφ) are calculated from GNSS data from 62 Greenland stations along with electron density and scintillation maps. Ground-based geomagnetic data is also analyzed. Extreme ionosphere events are presented and the underlying geophysical drivers, such as the auroral oval and electrojet, are identified and discussed. The goal is to understand how these factors influence TEC, S4 and σφ distributions to develop tools for monitoring and predicting Arctic