Determination of the deposition of cosmogenic radionuclide 35 S and sulfate in a heavy-snowfall area facing the Sea of Japan

Summary In connection with the investigation of acid depositions, a reliable method for the determination of the cosmogenic radionuclide 35 S in precipitation was developed, and atmospheric depositions of 35 S and SO 4 2- have been measured every ten days at Tatsunokuchi,in a heavy-snowfall area facing to the Sea of Japan for two years during 1998-1999. Consistent seasonal cycles were found for the atmospheric depositions of 35 S and non-sea salt sulfate (nss-SO 4 2- ), in which both depositions were high in winter and low in other seasons. A similar wet scavenging mechanism was suggested to be involved in the association of 35 S and SO 4 2- .