Total Radiation at Several Meteorological Stations in Japan

[摘要] The radiation on the horizontal surface observed by the Robitzsch actinograph at several Meteorological Stations in Japan was shortly investigationed. The investigations were made reducing the position of the sun to the vernal equinox, and correcting the effect due to the water vapour by the Fowle's formulae.The incoming radiation linearly varies with the duration of sunshine or the cloud amount. Some seasonal variation in this linear relation can be conceived. The interference by the cloud is strongest in the case of lower clouds and weakest in that of upper ones. The degrees of this interference by each unit cloud amount are abort 43, 26 and 18 gram cal/cm2 day for lower, middle and upper clouds respectively. Beyond the cloud amount 8, this decay of radiation becomes suddenly remarkable.The radiation arriving on the horizontal surface is reduced about 58% of the incoming radiation, which seems to vary with latitude.

[学科分类] 大气科学