Abstract
A slight reduction of the ozone level over the northern hemisphere in the period 1969-1986 has been reported [D. Lindley, Nature (Loud.) 323: 293 1988]. Ozone measurements performed in Oslo are in agreement with this. However, the ozone level for 1987 and 1988 was above normal, and no negative or positive trend is apparent for the last 10 years. The consequences of an ozone reduction for the fluence rate of carcinogenically effective sunlight was evaluated on the basis of recent action spectra for mutagenesis in cells, carcinogenesis in mice, and erythema induction in humans. Depending on the choice of action spectrum we find amplification factors (defined as percentage increase in yearly fiuence of carcinogenically efficient sunlight per percentage reduction of the ozone level) between 1.1 and 1.3 at latitudes between 0 and 20° and between 0.9 and 1.1 for Northern Europe. These estimates are significantly lower than 2.0, which is the value found when the calculations are based on the DNA absorption spectrum (R. B. Setlow, Proc. Natl. Acad. Sci. USA, 71:3363-3366,1974).
Original language | English |
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Pages (from-to) | 4247-4250 |
Number of pages | 4 |
Journal | Cancer Research |
Volume | 49 |
Issue number | 15 |
State | Published - 1 Aug 1989 |