POAM III observations of the anomalous 2002 Antarctic ozone hole

Details POAM III observations of the anomalous 2002 Antarctic ozone hole POAM III observations of the anomalous 2002 Antarctic ozone hole

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja....11059a&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #11059

Physics

Scientific paper

The 2002 Antarctic winter stratosphere was characterized by a series of unusually large planetary wave events that severely disrupted the polar vortex. During August and early September three minor warmings occurred, which set the stage for a late-September major warming. These events caused the polar vortex to split into two pieces in the middle to upper stratosphere (above about 600 K), resulting in greatly enhanced large-scale isentropic transport and mixing. The frequency at which the Polar Ozone and Aerosol Measurement instrument (POAM III) observed PSCs during the 2002 winter was the lowest in the 8-year POAM II &III record. Despite the reduced frequency and coverage of PSCs, POAM III observed nominal dehydration and lower stratospheric (below 600 K) ozone decreasing in typical fashion within the vortex until the late September major warming, during which the ozone loss rate slowed rapidly (about one week earlier than usual), resulting in 20% (about 30 DU) less chemical ozone loss than in previous winters. The transport of high-altitude (20-60 km) subtropical air to the polar region enhanced the total column near the pole by 150 DU in late September.

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