Reduced ozone loss at the upper edge of the Antarctic Ozone Hole during 2001-2004

Details Reduced ozone loss at the upper edge of the Antarctic Ozone Hole during 2001-2004 Reduced ozone loss at the upper edge of the Antarctic Ozone Hole during 2001-2004

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3220816h&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 20, CiteID L20816

Mathematics

Logic

10

Atmospheric Composition And Structure: Middle Atmosphere: Composition And Chemistry, Atmospheric Composition And Structure: Middle Atmosphere: Constituent Transport And Chemistry (3334), Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513)

Scientific paper

The top edge (20-22 km) of the Antarctic ozone hole has been identified as a good place to detect ozone recovery (D. J. Hofmann et al., 1997). During the first six POAM observation years (1994-1996, 1998-2000), the early October ozone mixing ratio at the top edge of the ozone hole was nearly constant, while during the last four years (2001-2004) it was noticeably greater. The estimated ozone photochemical loss for air sampled at 20-22 km in 2001-2004 was likewise smaller. During 2001-2004, there were fewer PSCs and generally higher temperatures during August and September at 20-22 km than prior years. The increased ozone was due to both reduced photochemical ozone loss (2001, 2003, and 2004) and enhanced adiabatic descent of the ozone profile (2002). Because of the changing meteorological conditions, the ozone changes at the top edge of the hole cannot be easily attributed to changes in chlorine abundance.

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