Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993stin...9625550t&link_type=abstract
Proceedings of the Faculty of Engineering of Tokai University, Volume 33, no. 2, p. 91-100
Astronomy and Astrophysics
Astronomy
Annual Variations, Diurnal Variations, Solar Radiation, Irradiance, Solar Flux Density, Ultraviolet Radiation, Ultraviolet Astronomy, Electromagnetic Scattering
Scientific paper
Solar ultraviolet-B (290-320 nm: UV-B), ultraviolet A (320-400 nm: UV-A) and Total (300-3000 nm) irradiances on the ground had been measured at Shonan Campus of Tokai University, Hiratsuka (35 deg N) for two years from October 1990 to September 1992, using the UV-B radiometers, conventional UV-A radiometers, and pyranometers. Daily, monthly and annual variations in UV-B, UV-A and Total irradiances were analyzed. The UV-B irradiance clearly demonstrates behaviors different from those of the UV-A and Total irradiances. For instance, the UV-B irradiance shows larger scattering (approximately 80% on the basis of a 24 month average), larger daily and seasonal variations, and higher dependency on air mass as compared with the UV-A and Total irradiances. The two year average ratios of daily integrated UV-B/UV-A/Total irradiances were to be 0.14/4.1/100.
Sakata Toshibumi
Sasaki Masako
Sudo Noriko
Takeshita Shu
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