GEOPHYSICAL RESEARCH LETTERS, VOL., NO., PAGES 1–3, Total ozone during the unusual Antarctic winter of 2002
Abstract. A major stratospheric warming was observed in the southern hemisphere during September 2002 for the rst time. Total ozone observations from the Global Ozone Monitoring Experiment (GOME) show the ozone hole dividing into two parts in late September,followedbyareestablishmentofthepolecentere...
| Main Authors: | , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.183.5064 http://www.iup.physik.uni-bremen.de/gome/paper/sinnhuber2002_submit.pdf |
| Summary: | Abstract. A major stratospheric warming was observed in the southern hemisphere during September 2002 for the rst time. Total ozone observations from the Global Ozone Monitoring Experiment (GOME) show the ozone hole dividing into two parts in late September,followedbyareestablishmentofthepolecenteredozone hole (de ned as the area of total ozone below 220 DU) in October. The ozone observations are well reproduced by a chemical transportmodel(CTM)drivenbyanalyzedwind eldsandtemperatures. Antarctic total ozone was signi cantly higher during winter and spring 2002 than during previous years. GOME showed October averages for the area south of 63 ◦ S of 291 DU for 2002, compared to between 204 and 248 DU for the years 1995–2001. Comparison with the CTM indicates that the unusually high ozone columns are largely a result of increased transport during the winter 2002. The estimated chemical loss of total ozone of about 80 DU south of 60 ◦ S is comparable to that of previous winters. We conclude that the increased total ozone during this winter must not be considered as a sign of ozone recovery but is just a consequence of an unusual meteorological situation during the winter of 2002. 1. |
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