HR: 11:35h
AN: A22A-05 [Abstracts]
TI: Changes in Ozone Loss at the Upper Edge of the Antarctic Ozone Hole During 1994-2005
AU: * Hoppel, K
EM: karl.hoppel@nrl.navy.mil
AF: Naval Research Lab, 4555 Overlook Ave. SW, Washington, DC 20375
United States
AU: Nedoluha, G
EM: gerald.nedoluha@nrl.navy.mil
AF: Naval Research Lab, 4555 Overlook Ave. SW, Washington, DC 20375
United States
AU: Fromm, M
EM: mike.fromm@nrl.navy.mil
AF: Naval Research Lab, 4555 Overlook Ave. SW, Washington, DC 20375
United States
AU: Allen, D
EM: doug.allen@nrl.navy.mil
AF: Naval Research Lab, 4555 Overlook Ave. SW, Washington, DC 20375
United States
AU: Bevilacqua, R
EM: richard.bevilacqua@nrl.navy.mil
AF: Naval Research Lab, 4555 Overlook Ave. SW, Washington, DC 20375
United States
AU: Alfred, J
EM: alfred@cpi.com
AF: Computational Physics Inc, 8001 Braddock Road, Suite 210, Springfield, VA 22151
United States
AU: Johnson, B
EM: Bryan.Johnson@noaa.gov
AF: NOAA Climate Monitoring and Diagnostics Laboratory, 325 Broadway, Boulder, CO 80305
United States
AU: König-Langlo, G
EM: gkoenig@awi-bremerhaven.de
AF: Alfred Wegener Institute for Polar and Marine Research, Postfach 120161, Bremerhaven, D-27515
Germany
AB:
The top edge (20-22 km) of the Antarctic ozone hole has been identified as a good place to detect ozone recovery [Hofmann et
al., 1997; WMO 2003]. 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 next 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 vertical advection
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. This analysis will be updated to include the 2005 ozone
hole.
DE: 0340 Middle atmosphere: composition and chemistry
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005