On the Solar-and-sky Radiation at Tokyo and Kumagaya

[摘要] Discussions of the comparison of the solar-and-sky radiation received on the horizontal surface at the Central Meteorological Observatory of Tokyo (ψ35°41′N, λ=139°46'E) and Kumagaya Meteorological Station (ψ=36°9'N, λ=139°29'E) are given. The instruments are of Robitzsch's self-recording actinograph, the material used being one year, viz., from January to December 1931.From the present investigation the following conclusions were derived.(1) The ration of the intensity of radiation for Kumagaya to that of Tokyo shows relatively large values in the morning and becomes smaller in the afternoon.(2) The ration of the daily total amount of radiation in boty places becomes relatively large in winter and small in summer. This is mainly due to the difference of cloud amount in both places.(3) The ratio of the intensity of radiation becomes larger and larger as the cloud amount increases.(4) Genberally, when the wind direction is south the ratio of the intensity of radiation is small compared to the case of northward wind direction. In winter, however, the relation is reversed, which may be attributable partly to the abundance and dust in the city of Tokyo.

[学科分类] 大气科学