Papers in Meteorology and Geophysics
Online ISSN : 1880-6643
Print ISSN : 0031-126X
ISSN-L : 0031-126X
Atmospheric Ozone and Nitrogen Dioxide Observed at Mt. Norikura
Y. MiyakeK. KawamuraS. Sakurai
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1961 Volume 12 Issue 3-4 Pages 310-317

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Abstract

The concentrations of the tropospheric ozone and nitrogen dioxide were observed at the side (elevation 1,450 m) and the top (elevation 2,770 m) of Mt. Norikura, Nagano Pref., in the early fall,1959 and 1960.
The results of the ozone measurement showed that the day-to- d a y variation in the concentration during the daytime was parallel to those of the ambient atmospheric pressure. The average daytime values of the ozone obtained in 1959 were 58 and 35 μgO3/m3, respectively, at the top and the side of the mountain, showing that the ozone increased approximately in proportion to the altitude of the observing stations. The values in 1960 were essentially lower than those in 1959.
The results of NO2 determination revealed that at the mountain side the concentration showed a marked diurnal variation with two maxima, i. e. at 07: 00 h-09: 00 h and 18: 00 h-20: 00 h, while no such a variation was observed at the mountain top. The average day and night values at the mountain side were nearly the same, namely,2.8and 3.1μgNO2/m3 in 1959 and 3.7 and 3.1μgNO2/m3 in 1960. The same is also observed at the mountain top, though the concentration is lower, the respective values in 1960 were 2.3 and 2.5 ugNO2/m3.

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