千葉県北部地域における酸性雨の地域的特性について(2) 1995年度観測結果

概要

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In order to make clear the regional characteristics of acid rain in Chiba Prefecture, the data of rainfall which were obtained during the period from April 1995 to March 1996 by the environmental monitoring volunteers of the Institute of Environmental Studies of Keiai University have been analyzed. The results of the analyses are summarized as follows : 1) The mean pH values of rain samples collected at every rain in the northern part of Chiba Prefecture are lower than the values of the area surrounding this part in both the warm and the cool seasons. 2) The mean values of NO_3^-/nss-SO_4^<2-> concentration ratio (N/S ratio) in the cool season are higher than the values in the warm season. 3) In the areas where the N/S ratio higher than 1.0 appeared with high frequency, the high concentrations of the ions are observed. 4) The pH value shows high negative correlation with fractional acidity ([H^+]/([nss-SO_4^<2->]+[NO_3^-]) in both the warm and the cool seasons.
敬愛大学・千葉敬愛短期大学の論文