Map 1
Mean ultraviolet radiation for June through August, Canada, 1980 through 1990

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Map description

The title of the map is "Mean ultraviolet radiation for June through August, Canada, 1980 through 1990"

Mean ultraviolet radiation (UVR) across Canada diminishes at progressively higher latitudes. During the 1980-to-1990 period, mean UVR in the summer months (June through August) was in the 7,000 to 7,500 J/m2 range in Canada's most southerly latitudes. By contrast, in the most northerly regions, mean summer-time UVR was in the 1,500 to 2,000 J/m2 range. Significant differences in melanoma hazard ratios were evident between Calgary (6,500 to 7,000 J/m2 range) and Edmonton (5,500 to 6,000 J/m2 range) and between Toronto (6,500 to 7,000 J/m2 range) and Montréal (6,000 to 6,500 J/m2 range).

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