HR: 1400h
AN: GC23A-05    [Abstracts]
TI: Analysis of the Extraterrestrial Influences on the Antarctic Ozone Hole Size.
AU: * Alvarez-Madriga, M
EM: mmadrigal@itesm.mx
AF: IE Department, Tecnológico de Monterrey, Campus Estado de México, Carretera al lago de Carretera al LagoGuadalupe, Km. 3.5, Estado de Mexico , México, Estado de Mexico, Mex 52926, Mexico
AU: Velasco-Herrera, V M
EM: vmv@geofisica.unam.mx
AF: Instituto de Geofisica, Universidad Nacional Autonoma De Mexico, Ciudad Universitaria, Coyoacan, Mexico, D.F 04510, Mexico
AU: Perez-Peraza, J A
EM: perperaz@yahoo.com.mx
AF: Instituto de Geofisica, Universidad Nacional Autonoma De Mexico, Ciudad Universitaria, Coyoacan, Mexico, D.F 04510, Mexico
AB: In this work we look for evidences of relationships between the Antarctic Ozone Hole Size (OHS) and the Solar Cycle (SC) periodicities, as well as with the Cosmic Rays (CR) fluxes. With this goal in mind we also analyze the Antarctic temperature anomalies, linked with the OHS, and their response to the SC and CR variations. By means of wavelet transformation based on the Morlet wavelet, it is found that (OHS) present a prominent periodicity frequency at ~ 3.5 yrs. Then, applying the Wavelet Coherence analysis to two time-series, it is found: (1) there is a common signal along time (September-november) of ~ 3.5 yrs. between (OHS) and Cosmic Ray (CR): from 1988 to 1990 with a coherence coefficient of 0.8 and from 1998 to 2002 with a coherence coefficient of 0.9. In both periods the relationship is of non-linear nature. (2) the coherence between the time series of (OHS) and Antarctic temperature (AT) is of linear nature (anticorrelation) with a coherence factor > 0.85 in the periods 1985-1990 and 1998-2002. (3) the coherence between the time series of (RC) and (AT) at polar altitude of 10-30 Km is of non-linear nature between 1986-1990 and of linear nature in the period 1991-1996 with coherence within in the interval [0.65-0.7] in both cases. Between 1997-2002 there is a non-linear relation with coherence in the interval [0.7-0.9]. (4) the coherence between (SC) and (AT) is of non-linear nature is in the range [0.7-0.85] in the period 1987-1992. Preliminary inferences seems to indicate that there is a relationship between the the Ozone Hole Size and Cosmic Rays.
DE: 1635 Oceans (1616, 3305, 4215, 4513)
DE: 1650 Solar variability (7537)
DE: 2104 Cosmic rays
DE: 2162 Solar cycle variations (7536)
DE: 2479 Solar radiation and cosmic ray effects
SC: Global Climate Change [GC]
MN: 2007 Joint Assembly