CIRES researchers explore the Sun-Earth system using space- and Earth-based platforms. In partnership with NOAA, CIRES scientists study the Sun to better understand and predict its influence on the Earth's magnetosphere and upper atmosphere, including the continually evolving aurorae and radiation belts. They then apply this fundamental scientific knowledge to develop practical applications to mitigate space weather effects on technologies such as satellite control and power grids as well as on humans. As an example, CIRES researchers explore the dynamics of the thermosphere and seek to understand the electromagnetic disturbances that compromise global communication and transportation systems. Scientists at CIRES also use space-based remote sensing to enhance land-based observations, which ultimately improve the understanding of all components of the Earth environment including the cryosphere, the oceans, the forests, and the urban environment.