Information on Vitamin D Synthesis / Erythemal UV

Japanese

Exposure Time for Vitamin D Synthesis / MED (Climatology):Osaka

Exposure Time around Noon (min.)
January February March
early middle late early middle late early middle late
MED -- -- -- -- -- -- -- -- --
600 cm2 -- -- -- -- -- -- -- -- --
1200 cm2 -- -- -- -- -- -- -- -- --

April May June
early middle late early middle late early middle late
MED -- -- -- -- -- -- -- -- --
600 cm2 -- -- -- -- -- -- -- -- --
1200 cm2 -- -- -- -- -- -- -- -- --

July August September
early middle late early middle late early middle late
MED -- -- -- -- -- -- -- -- --
600 cm2 -- -- -- -- -- -- -- -- --
1200 cm2 -- -- -- -- -- -- -- -- --

October November December
early middle late early middle late early middle late
MED -- -- -- -- -- -- -- -- --
600 cm2 -- -- -- -- -- -- -- -- --
1200 cm2 -- -- -- -- -- -- -- -- --

The numerical values in the row of 'MED', '600 cm2' and '1200 cm2' show the mean time to reach MED (Minimal Erythema Dose), the time required for 10 µg Vitamin D to be produced for a skin area of 600 cm2, and 1200 cm2 exposed to solar radiation in minutes, respectively.
By clicking each 10 day period, you can also see a diurnal variation of exposure time for that period.
In case no data are available, '--' is put in the matrix.

Appropriate exposure time at every site shown below can be seen.
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).

Position of Osaka