Mathematics – Logic
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..189c&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 2, p. 189-192
Mathematics
Logic
4
Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Global Change: Atmosphere
Scientific paper
A record low annual mean value of total ozone was observed at Lauder, New Zealand in 1997, namely 294.5 DU, compared to a 1985-96 mean of 307.9+/-3.7. Ozone values were low through most of the year, especially in winter and spring. These observations are similar to TOMS results for Southern mid-latitudes, although the long-term comparison is clouded by the change in TOMS instruments. A regression analysis of the Lauder record through 1996 allows a generally accurate prediction of the 1997 values, shows that the QBO dominates the 1996-97 difference, and that the 1997 values are consistent with a linear long-term trend in ozone. The analysis does not completely explain low monthly values in austral spring. Enhancements in biologically active UV radiation were also observed, with monthly mean values increased by as much as 20-40% from recent years. The unusual ozone values were the dominant cause of the UV enhancement.
Bodeker Greg E.
Boyd Ian S.
Connor Brian J.
McKenzie Richard L.
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