O₃ concentration by the solar term and stream water chemistry around Mt. Gokurakuji, Hiroshima Prefecture, Japan

Abstract

We investigated the O₃ concentration by the solar term and stream chemistry around the Mt. Gokurakuji, Hiroshima prefecture, where the forest decline was reported. The concentration of O₃ for the three years was 24.6 ppb on average, and it was at the same level as that of Tokyo Tower, the metropolitan area. Cl- concentration of water streams around the Mt. Gokurakuji were 90.4μM on average, quarter as high as that coast of the metropolitan area, and the NO₃^- concentration were 13.8μM on average, which was lower than the metropolitan areas, where nitrogen saturation was reported. However, O₃ and NO₃^- as a secondary product from NOx were proceeded in conjunction. Thus, it is essential to figure out the situation of environment such as O₃ and NO₃^-.