千葉県北部における酸性雨の地域的特性について(8) : 2001年度観測結果

概要

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In order to clarify the regional characteristics of acid rain in Chiba Prefecture, the data of precipitation which were obtained during the period from April 2001 to March 2002 with the aid of 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) NO_3^-/nss-SO_4^<2-> ratio (N/S ratio) of the Northern Region in Chiba Prefecture shows the tendency which decreases for the east from the west in warm period. 2) The value of pH and N/S ratio recived the effect of the large SO_2 emission from the Miyakejima volcano. 3) The pH distribution and fractional acidity [H^+]/([nss-SO_4^<2->]+[NO_3^-]) distribution in the warm period show the very good correlation. The relationship between pH and fractional acidity (A) in warm period in Sakura is shown in the following equation. pH=-0.957A+4.901 r=-0.503 And, the relationship between pH and fractional acidity (A) in cooling season is shown in the following equation. pH=-0.545A+4.869 r=-0.382
敬愛大学・千葉敬愛短期大学の論文