Wet-deposition fluxes of soluble chemical species and the elements in insoluble materials

From March to June 1996, eight rain events were collected by sequential sam pling on time and volume basis in Kyoto University, Uji, Japan. Soluble che mical species Cl-, NO3-, SO42-, Na+, NH4+, K+, Ca2+ and Mg2+ were measured by Ion Chromatography (IC); and the elements Si, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Br and Pb in insoluble materials were measured by proton-in duced X-ray emission (PIXE) technique. The wet-deposition flux of a soluble chemical species (or an element in insoluble materials) was calculated by the product of the chemical species (or the element) concentration and the corresponding rain intensity. The characteristics of sequential cumulative wet-deposition flux of the soluble chemical species and the elements in ins oluble materials were examined. The factor controlling wet-deposition flux was discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.