The major emphasis at PEARL is on atmospheric research. The original purpose of the installation was to monitor stratospheric ozone, and although that work is still ongoing, the research has now broadened in scope to encompass the entire atmosphere and beyond. Current measurements include ozone and associated chemicals in the stratosphere as well as the troposphere, aerosols and particulates, radiation and fluxes and upper atmo­sphere temperatures, winds, and waves. Other research groups including biologists, astronomers, and geologists regularly make use of the nearby Eureka Weather Station as a base. Measurements are regularly submitted to the NDACC, TCCON, and AeroNet databases.