The Chemistry of Rain Water

[摘要] From the analytical data of rain water in Tõkyõ, Kõbe and Hamamatu, the writer obtained the following results.§Chloride. 1. The yearly averages. Cl mg/L, Tõkyõ 1.79, Kõbe 2.33, Hamamatu 2.39.2. There is a marked correlation between chloride content and wind velocity.3. There are group distributions in the chloride concentration as in the case of Köhler and Israël, however, the principal values are not the same as those obtained by the above authors; Tokyo: Cl=2.10×2nmg/L Kobe: Cl=1.89×2nmg/L Hamamatu: Cl=4.0×2nmg/L4. The ratio, Cl/S, in rain water is larger than value of Cl/S in sea water, when sulphuric acid from coal can be eliminated. The possibility of the variation Cl/S and Cl/Mg (Lipp) is discussed.§Sulphuric acid. 1. Sulphuric acid content in rain water is larger in winter than in summer. The yearly average: Tõkyõ. 1.86 S. mg/L.2. There is a parallelism between the yearly variation of sulphuric acid in rain and that in air.§Ammonia. 1. In the yearly variation of ammonia, the maximum exists in June; this is good agreement with that in air.2. The yearly average; Tõkyõ 0.58, Kõbe 0.28, Hamamatu 0.19 N. mg/L.§pH. The yearly average: Tokyo; 4.1, Kobe 5.2, Hamamatu 5.6.2. It can be theoretically calculated from the difference between the equivalent of sulphuric acid and ammonia.§Nitrite. 1. The nitrite content in rain is very small when compared with that in air.2. The yearly average. Tõkyõ 6.7, Kõbe 4.0, Hamamatu 2.7 γ/L.3. The seasonal variation (γ/L)

[学科分类] 大气科学