Lead and Lithium Isotope Ratios and their Variation in Atmospheric Deposits in Fukuoka, Japan in the 1960s

Lead and lithium isotope ratios in the monthly atmospheric deposits in Fukuoka, located on the southwestern part of the Japanese Islands, in 1964 and 1965 were determined.The Pb isotope ratios in the depositssuggest the atmospheric environment in the 1960s in Japan had been strongly affected by automobile pollution in those days. The Li isotope ratio in the deposits shows the seasonal variation. This variation couldbe attributed to mixing of sea salt aerosols with mineral dust.