HR: 1400h
AN: A23A-15    [Abstracts]
TI: Ozone variations for Brisbane Australia and Mexico City over the period 1958-2004
AU: * Lemus-Deschamps, L
EM: L.Deschamps@bom.gov.au
AF: BMRC, Bureau of Meteorology, GPO Box 1289, Melbourne, Vic 3001, Australia
AU: Galindo, I
EM: igalindo@ucol.mx
AF: CUICA, Universidad de Colima, Apartado Postal No. 44, Colima, Col 28000, Mexico
AU: Zenteno, G
EM: mgrzs@servidor.unam.mx
AF: Instituto de Geologia, Universidad Nacional Autonoma de Mexico, Cd. Universitaria, Mexico,City, DF 04510, Mexico
AB: Ozone variations over the period 1958 to 2004 for Brisbane, Australia and Mexico City, Mexico are presented in this paper. Ground-based total ozone data sets are compared with ERA40 and TOMS and used to estimate the total ozone variations. A significant spectral peak at wavelength between 10-11 years which corresponds to the solar cycle was found in the series. The data sets were deseasonalized and the anomalies relative to the period pre-ozone-hole (1970-1980) were calculated. The data sets show changes in the rate of the total ozone decline during the 80's while the ozone decline during the 90's is fairly constant. Ozone decline related to volcanic eruptions is seen during the 80's and 90's. Tropopause temperature and 50hPa temperature data sets for the same period were also deseasonalized and the anomalies relative to the period pre-ozone-hole (1970-1980) were calculated. For both cities, a decline of the 50hPa temperature is seen during the 80's. For the tropopause temperature, Brisbane shows a decline during the 80's, while Mexico City shows an increase, which could be related to the impact of volcanic eruptions
DE: 3305 Climate change and variability (1616, 1635, 3309, 4215, 4513)
DE: 3319 General circulation (1223)
DE: 3362 Stratosphere/troposphere interactions
DE: 3374 Tropical meteorology
SC: Atmospheric Sciences [A]
MN: 2007 Joint Assembly