Information on Vitamin D Synthesis / Erythemal UV

Japanese

Radiation for Vitamin D Synthesis / Erythemal UV (Tsukuba)

The above panel shows quasi-real time solar radiation for Vitamin D Synthesis calculated from observed UV radiation at Tsukuba by the 'monitoring network for ultraviolet radiation'. Values change largely in case when clouds pass by the solar disk. The lower panel shows its 30-minute average.

Color scale of the right-hand bar shows the amount of Vitamin D produced in 10 min for a skin area of 600 cm2 or 1200 cm2 exposed to solar radiation for that period. Area 600 cm2 corresponds to exposure of face and hands, and area 1200 cm2 corresponds to exposure of arms and legs additionally. Here the standard Japanese skin photo type (SPT: Ⅲ) is assumed.

The above panel shows quasi-real time Erythemal UV radiation calculated from observed UV radiation at Tsukuba by the 'monitoring network for ultraviolet radiation'. The lower panel shows its 30-minute average.

Radiation at other sites can be seen from the links below.
Cape Ochi-ishi (Hokkaido), Rikubetsu (Hokkaido), Sapporo (Hokkaido), Aomori (Aomori), Tsukuba (Ibaraki), Yokohama (Kanagawa), Nagoya (Aichi), Otsu (Shiga), Osaka (Osaka), Miyazaki (Miyazaki), Cape Hedo (Okinawa), Hateruma (Okinawa).

Monitoring Stations