WIT Press

Characteristics Of The Hourly And Seasonal High Concentration Frequency Pattern Of SO2, NOx, OX And SPM In Yamaguchi Prefecture, Chugoku Region, Western Japan

Price

Free (open access)

Volume

28

Pages

10

Published

1998

Size

866 kb

Paper DOI

10.2495/AIR980491

Copyright

WIT Press

Author(s)

Prabal Kanti Roy *& Seiji Hayakawa

Abstract

The distributions of SO,, NOx, OX and SPM concentrations for 1991 - 96 in four different cities in the Yamaguchi Prefecture were analyzed to depict the air pollution conditions in this region. The trends of annual pattern of the mean concentrations show an increasing trends in SO2 and OX concentrations in all the four cities. For NOx in Yamaguchi city and in Kokusetsu Ube, it shows a little increasing trends, but in Ube city office, Shimonoseki city and Tokuyama city it is decreasing. The seasonal pattern shows that in Spring and in Winter, the concentrations of pollutants are high. A

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