Measurements of Atmospheric Peroxides Concentrations Near the Summit of Mt. Norikura in Japan

[摘要] Concentrations of gaseous peroxides and other trace gases (O3, SO2) have been measured near the summit of Mt. Norikura (altitude, 2770m) in central Japan, during summer and early autumn. Hydrogen peroxide (H2O2) and O3 reached the maximum concentrations at midnight and the minimum at midday. The maximum concentrations of H2O2 and O3 appearing at midnight are likely to be caused by subsidence from a higher atmospheric level. This tendency is quite opposite to that appearing in the low-altitude flat areas. The ratio of [H2O2]/[SO2], which is a useful indicator of the oxidizing capacity from SO2(S(IV)) to H2SO4(S(VI)), was almost larger than 1 during summer. This means that oxidant of SO2 is plentiful in the summer season and is likely to accelerate the heterogeneous oxidation in atmospheric water droplets.

[学科分类] 大气科学