THE DIURNAL AND ANNUAL VARIATIONS OF THE SPECTRAL INTENSITY OF ULTRAVIOLET SKY AND GLOBAL RADIATION (BETWEEN 297.5 MU AND 380 MU) ON CLOUDLESS DAYS AT DAVOS, 1590 M A.S.L
Abstract
The climatological features of the spectral intensity of ultraviolet sky and global radiation are presented in this paper in the form of hourly values for every month of the year. These figures relate to monthly means of atmospheric ozone and to average conditions of ground reflexion and turbidity during the ''winter period'' (ground covered with snow) and the ''summer period'' (ground free from snow). Diagrams showing the diurnal variation of the intensity for various wavelengths and its spectral distribution for different hours of the day are presented for December, March, June and September, which months have high, medium and low monthly means of atmospheric ozone amount. Further diagrams show the annual variation of the intensity for various hours and wavelengths. The latter curves illustrate the combined effect of the annual variation of solar declination, atmospheric ozone and ground reflexion on the intensity of ultraviolet sky and global radiation. The ratio between the vertical component of direct ultraviolet solar radiation and total diffuse radiation is examined in its diurnal and annual variation and in dependence on wavelength. An increase of this ratio with in creasing values of solar altitude and wavelength can be stated for all wavelengths between 330 mu and 370 mu. The influence of atmospheric ozone on this ratio is shortly discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1963
- Accession Number
- AD0409030
Entities
People
- Paul Bener