Acid precipitates in the rainfall and snowfall in the district along the shore of the Japan sea in Yamagata prefecture [in Japan]
1990
Ueki, K. (Yamagata univ., Tsuruoka (Japan). Faculty of Agriculture) | Iida, T. | Ueki, A. | Ishida, T. | Tsukahara, H. | Kuwahara, H.
In the present study, acid precipitates in the rainfall and snowfall in the district along the shore of the Japan Sea in Yamagata Prefecture were analyzed. In 36 precipitations sampled from January in 1988 to July in 1989, only one rainfall showed the pH value over 5.6. This indicates that both acid rain and acid snow fall in this district with considerable frequency. In the rainfalls, the ratio of the SO4(2-) concentration to the Cl(-) concentration and the ratio of the NO3(-) concentration to the total anion concentration were higher than in the snowfalls. The electrical conductivity of precipitations highly interrelated to the concentrations of Cl(-) and SO4(2-). Anion concentrations in the snowfall closely interrelated to each other. But in the rainfall, the Cl(-) concentration did not show the close interrelation to the SO4(2-) concentration and the Cl(-) concentration did not interrelate to the NO3(-) concentration. These results indicate that anion contents in the snowfalls differ from those in the rainfalls
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