Exposure Time for Vitamin D Synthesis / MED (Climatology):Aomori
Exposure Time around Noon (min.)
January
February
March
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
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
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
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
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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).