Research group Middle and Upper Atmosphere

The Earth's mesosphere and lower thermosphere (altitudes 50-130 km) can be regarded as a transition region between our familiar atmospheric environment and outer space. It is strongly affected both by atmospheric motion below and by energetic solar influences from above. The lowest part of the Middle atmosphere, the Stratosphere, is perhaps mostly known for its ozone layer. However, Statospheric circulation patterns can also impact our weather and for instance give us long-lasting cold-spells in connection to so-called Stratospheric warming.

Our research focuses on these interactions, and scientific questions range from cloud microphysics to global circulation patterns. A starting point is the observation of phenomena like noctilucent clouds (the highest clouds on Earth) or airglow (light emitted by the atmosphere). Central for our research programme are optical techniques in remote sensing and local measurements.

Since its launch in 2001, the Swedish Odin satellite has provided us with a wealth of data on middle atmosphere composition and dynamics. In November 2022, we launched MATS as the next Swedish satellite mission, with the goal of better understanding the role of atmospheric waves in connecting different parts of the climate system. As for local measurements, Esrange Space Center is a focal point for our research using sounding rockets, lidar and spectroscopic techniques.