Weather Data Measured & Calculated
Table A1: EPA Skin Phototypes
Skin Phototype | Skin color | Tanning & Sunburn history |
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4 - Always tans; | Brown, dark brown, or | Rarely burns; shows very rapid tanning |
rarely burns | black | response |
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T. B. Fitzpatrick of the Harvard Medical School developed a categorization of skin types 1 through 6 which were adopted by Environment Canada. These skin types are detailed in Table 3b below.
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| Table A2: Environment Canada Skin Types and Reaction to the Sun | |||
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| Skin | Skin Color | History of Tanning & Sunburning | |
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| I | White | Always burns easily, never tans | |
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| II | White | Always burns easily, tans minimally | |
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| III | Light Brown | Burns moderately, tans gradually | |
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| IV | Moderate | Burns minimally, tans well | |
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| Brown | |||
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| V | Dark Brown | Burns rarely, tans profusely | |
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| VI | Black | Never burns, deep pigmentation | |
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Note: | More about the Fitzpatrick Skin Types is available in: Fitzpatrick TB. Editorial: the | ||||
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UV Dose and Sunburn - Use this plot to estimate the MED dose leading to sunburn. A person with Type II (Environment Canada) skin type might choose
0.75MED as the maximum for the day; in contrast, a person with Type V (Environment Canada) Skin Type might consider 2.5 MEDs a reasonable dose for the day. NOTE: the Weather Envoy assumes a Fitzpatrick (Environment Canada) Skin Type of II.
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