Atmospheric Impurities in the Central Part of Tokyo

[摘要] From April 1938 to March 1939, the quantities of the atmospheric impurities in the central part of Tokyo were chemically estimated. From the analytical data, the writer obtained the following results.§ Chloride. 1. Max. 21.8 γ/m3, min. trace. The yearly average; 4.40 γ/m32. There is a correlation between chloride content and wind velocity.§ SO2 (and H2SO4)-Sulphur. 1. Max. 38.8γ/m3, min. trace. The yearly average; 7.38γ/m32. Sulphuric acid content is larger in winter season (Dec-Apr.) than in summer (May-Nov.)§ Ammoniacal Nitrogen. 1. Max. 78.1 γ/m3, min. 30γ/m3. The yearly average; 23.22 γ/m3.2. In the yearly variation of ammonia, the maximum comes in June. This suggests that the origin of ammonia is not the fuel but the putrefied substance.§ pH of Water through which the Air-bubbles were passed.It can be theoretically calculated from the difference between the equivalent of sulphuric acid and ammonia.§ Nitrite nitrogen. 1. Max. 15.6 γ/m8, min, trace. The yearly average; 5.65 γ/m3.

[学科分类] 大气科学