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Science 10 September 1999:
Vol. 285. no. 5434, pp. 1709 - 1711
DOI: 10.1126/science.285.5434.1709
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Reports

Increased Summertime UV Radiation in New Zealand in Response to Ozone Loss

Richard McKenzie, * Brian Connor, Greg Bodeker

Long-term decreases in summertime ozone over Lauder, New Zealand (45°S), are shown to have led to substantial increases in peak ultraviolet (UV) radiation intensities. In the summer of 1998-99, the peak sunburning UV radiation was about 12 percent more than in the first years of the decade. Larger increases were seen for DNA-damaging UV radiation and plant-damaging UV radiation, whereas UV-A (315 to 400 nanometers) radiation, which is insensitive to ozone, showed no increase, in agreement with model calculations. These results provide strong evidence of human-induced increases in UV radiation, in a region where baseline levels of UV radiation were already relatively high.

National Institute of Water and Atmospheric Research, NIWA Lauder, PB 50061 Omakau, Central Otago, New Zealand.
*   To whom correspondence should be addressed. E-mail: r.mckenzie{at}niwa.cri.nz

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