Abstract
The present paper contains some results of observations of nocturnal radiation made at the cen'ral Meteorological Observatory (Tokyo) by means of a pyrgeometer of Angström's pattern during the last quarter of 1935. The amounts of outward radiation are observed to be in a close connection to the weather type, vertical distribution of temperature, vapour contents of the atmosphere and other meteorological factors. The discussions are made on the residuals O-C as reduced on the basis of Brunt's formula RN=σT4(A-B√ρ), which are plotted against those meteorological factors. Also the importance of considering those relations in connection with the difference of “air mass” is emphersized.
