G Bodeker

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Long-term decreases in summertime ozone over Lauder, New Zealand (45 degrees 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(More)
Trends in NO 2 derived from a 45 year integration of a chemistry-climate model (CCM) run have been compared with ground-based NO 2 measurements at Lauder (45 • S) and Arrival Heights (78 • S). Observed trends in NO 2 at both sites exceed the modelled trends in N 2 O, the primary source gas for stratospheric NO 2. This suggests that the processes driving the(More)
We investigate the extent to which quantities that are based on total column ozone are applicable as measures of ozone loss in the polar vortices. Such quantities have been used frequently in ozone assessments by the World Meteorological Organization (WMO) and also to assess the performance of chemistry-climate models. The most commonly considered(More)
This is a preliminary PDF of the author-produced manuscript that has been peer-reviewed and accepted for publication. Since it is being posted so soon after acceptance, it has not yet been copyedited, formatted, or processed by AMS Publications. This preliminary version of the manuscript may be downloaded, distributed, and cited, but please be aware that(More)
Trends in NO 2 derived from a 45 year integration of a chemistry-climate model (CCM) run have been compared with ground-based NO 2 measurements at Lauder (45 • S) and Arrival Heights (78 • S). Observed trends in NO 2 at both sites exceed the trends in N 2 O, the primary source gas for stratospheric NO 2 , suggesting that processes driving the 5 NO 2 trend(More)
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