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

Exposure Time around Noon (min.)

January February March early middle late early middle late early middle late MED 120 100 100 85 75 55 55 45 45 600 cm2 50 50 45 35 30 20 20 15 15 1200 cm2 25 25 22 17 15 10 10 8 8

April May June early middle late early middle late early middle late MED 35 35 30 30 30 30 30 30 30 600 cm2 12 12 10 10 10 9 9 10 10 1200 cm2 6 6 5 5 5 5 5 5 5

July August September early middle late early middle late early middle late MED 32 30 25 22 25 30 30 35 40 600 cm2 11 9 9 8 9 9 10 12 14 1200 cm2 6 5 4 4 4 5 5 6 7

October November December early middle late early middle late early middle late MED 40 50 55 60 75 90 100 110 120 600 cm2 15 17 20 23 30 40 40 50 55 1200 cm2 8 8 10 12 15 20 20 25 30

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).

Position of Nagoya