The World Data Center for Aerosols is the data repository and archive for atmospheric aerosol microphysical, optical, and chemical property data, operated as part of the World Meteorological Organisation’s Global Atmosphere Watch programme. The centre supports long-term aerosol measurements to detect trends in global air chemical constituent distributions, with a focus on characterising the spatio-temporal distribution of aerosol properties related to climate forcing and air quality across regional, hemispheric, and global scales over multi-decadal time periods. It curates core long-term aerosol observation parameters including particle number concentration, size distribution, mass concentration, and cloud condensation nuclei concentration.
