Characterization of cloud water chemistry at Mount Tai, China: Seasonal variation, anthropogenic impact, and cloud processing

► A comprehensive study of cloud water was conducted at Mt Tai in China in 2007-2008. ► Cloud water composition at Mt. Tai is strongly influenced by anthropogenic emissions. ► Cloud water has low pH values and is more acidic for air masses from southern China. ► Drop-size dependence of cloud ionic composition varies with cloud evolution. ► In-cloud S(IV) oxidation on average accounts for 27% of the total cloud sulfate.