The Welgegund atmospheric measurement station is located on a grazed grassland-savannah approximately 100 km west of Johannesburg (Gauteng) metropolitan area in South Africa. The site is frequently hit by pollution plumes from Johannesburg metropolitan area and the western Mpumalanga industrial Highveld, with frequent clean air injections from the west. The observations at the site include aerosol and ion size distribution measurements, aerosol optical properties, trace gases, CO2-fluxes, radiation and water balance, and comprehensive meteorological observations. The site is operated jointly by the North-West University (NWU), the University of Helsinki (UH) and the Finnish Meteorological Institute (FMI).
(Pages updated: 29 July 2015)