HR: 0800h
AN: A51D-0806    [Abstracts]
TI: Change In Ozone Trends At Southern High Latitudes
AU: * Yang, E
EM: yes@eas.gatech.edu
AF: Georgia Institute of Technology, School of Earth and Atmospheric Sciences, Atlanta, GA 30332 United States
AU: Cunnold, D M
EM: cunnold@eas.gatech.edu
AF: Georgia Institute of Technology, School of Earth and Atmospheric Sciences, Atlanta, GA 30332 United States
AU: Newchurch, M J
EM: mike@nsstc.uah.edu
AF: University of Alabama in Huntsville, Atmospheric Science Department, Huntsville, AL 35805 United States
AU: Salawitch, R J
EM: rjs@caesar.jpl.nasa.gov
AF: Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AB: Long-term variations of total ozone columns at 60-70oS in spring have been investigated using both ground-based and satellite measurements. Strong positive correlation is shown between year-to-year variations of ozone and temperature in September and October. Based on this relationship, the effect of year-to-year vortex dynamical variations have been filtered out. This results in ozone time series which show increasing springtime ozone losses over the Antarctic until the mid-1990s. After that time, the ozone losses have leveled off. The analysis confirms that this change is consistent for all the measurement techniques and it is statistically significant at the 95% confidence level.
DE: 0340 Middle atmosphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting