Information on Vitamin D Synthesis / Erythemal UV | Center for Global Environmental Studies

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

Exposure Time around Noon (min.)

	January			February			March
	early	middle	late	early	middle	late	early	middle	late
MED	80	80	75	70	60	55	50	40	45
600 cm²	30	30	30	25	22	20	20	15	15
1200 cm²	15	15	15	13	11	10	9	8	8

	April			May			June
	early	middle	late	early	middle	late	early	middle	late
MED	40	32	32	35	32	30	35	40	35
600 cm²	13	12	11	12	11	10	12	13	12
1200 cm²	7	6	6	6	6	6	6	7	6

	July			August			September
	early	middle	late	early	middle	late	early	middle	late
MED	30	25	22	25	30	30	30	40	40
600 cm²	10	9	8	9	10	9	10	15	15
1200 cm²	5	5	4	4	5	5	5	8	8

	October			November			December
	early	middle	late	early	middle	late	early	middle	late
MED	40	50	60	55	70	85	80	80	100
600 cm²	15	20	22	20	25	35	30	32	40
1200 cm²	7	10	11	10	12	17	15	16	20

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.

Appropriate exposure time at every site shown below can be seen.
Cape Ochi-ishi (Hokkaido), Rikubetsu (Hokkaido), Sapporo (Hokkaido), Aomori (Aomori), Sendai (Miyagi), Tsukuba (Ibaraki), Yokohama (Kanagawa), Nagoya (Aichi), Otsu (Shiga), Osaka (Osaka), Miyazaki (Miyazaki), Cape Hedo (Okinawa), Hateruma (Okinawa).

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

Position of Miyazaki