and for nss-SO 4 2- : 4.5 ng m -3 . Reference: Weller, R. and D. Wagenbach, Year round chemical aerosol records in continental Antarctica obtained by automatic samplings, Tellus B(4), 59, pp. 755 765. doi: [...] sulfate (nss-SO 4 2- , triangles) concentrations measured during four years at Kohnen station. Yellow shaded areas mark sampling broke down due to power failure; detection limit for MSA: 2.7 ng m -3 and [...] by an automated weather station (daily mean values, AWS 9, IMAU, Utrecht University) installed about 2 km east of Kohnen Station. The yellow area marks the period of unattended operation. We deployed about