Studies on Air Pollution and Meterological Phenomena. I. Analysis of SO2 High Concentration in Keiyo Coastal Industrial Area from the Viewpoint of Weather Maps

Abstract

The area of Keiyo coastal industrial development program stretches over 76 km along Tokyo Bay from the coast of Urayasu on the north to the cape of Futtsu on the south. The area to be reclaimed by 1985 is expected to cover 14123 ha. In order to maintain the environment in good condition by preventing air pollution by the activities of the plants in this Keiyo industrial area, sulfur oxide concentration was measured at 24 monitoring stations and relationship between weather map type and high-level SO2 concentration in this area was examined. From the results of this investigation, the following points were clarified. 1) High SO2 concentration occurred during high rather than low atmospheric pressure. 2) Frequency of high concentration of SO2 at more than 10 monitoring stations according to atmospheric pressure pattern was found 52 times, the majority being in H2 and H5 types. 3) With respect to the high SO2 concentration areas of H2 and H5 types, H2 type was the highest in Ichihara area during 11 : 00 to 14 : 00 o'clock and low at hight, but comparatively high all day in was Funabashi and Chiba area, probably due to the land and sea breeze. High concentration of the H5 type (summer) was found to occur along the coast from Hamano to the Institute of Pollution Research at Iwasaki. 4) State of contamination by hourly variation in high SO2 concentration can be seen in two areas of Ichihara (excluding Anesaki) and Chiba (Chiba-Ohmori).