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

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

Exposure Time around Noon (min.)

	January			February			March
	early	middle	late	early	middle	late	early	middle	late
MED	350	220	250	220	200	120	100	100	85
600 cm²	220	120	140	120	90	60	50	40	35
1200 cm²	120	60	70	60	45	30	25	20	17

	April			May			June
	early	middle	late	early	middle	late	early	middle	late
MED	80	65	55	50	50	45	40	45	45
600 cm²	30	25	20	20	20	15	15	15	15
1200 cm²	15	12	10	10	10	8	8	8	8

	July			August			September
	early	middle	late	early	middle	late	early	middle	late
MED	40	40	40	40	40	45	45	50	60
600 cm²	15	15	12	12	15	15	15	20	22
1200 cm²	7	7	6	6	7	8	8	9	12

	October			November			December
	early	middle	late	early	middle	late	early	middle	late
MED	90	90	120	140	200	250	300	500	350
600 cm²	35	35	50	60	100	150	200	350	220
1200 cm²	17	17	25	30	50	80	100	180	120

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), 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):Aomori

Position of Aomori