The Atmosphere Cluster (AC) in the Division of Atmospheric and Geospace Sciences (AGS) supports fundamental studies of atmospheric processes from the Earth’s surface to the stratosphere, and from timescales of nanoseconds to millennia. Core areas of research include the chemical, physical, and dynamical processes in the atmosphere that impact clouds, weather, climate, air quality, and the water cycle. Research methods include modeling, collecting observations, conducting experiments in the laboratory and field, and ad...