HR: 0800h
AN: GP41D-08    [Abstracts]
TI: Atmospheric electric field effects of cosmic rays detected in Mexico City.
AU: * González, L X
EM: xavier@geofisica.unam.mx
AF: Intituto de Geofísica, UNAM., Cto. ext. s/n, Ciudad Universitaria, Coyoacan, Mexico, D.F., 04510, Mexico
AU: Valdes-Galicia, J F
EM: jfvaldes@geofisica.unam.mx
AF: Intituto de Geofísica, UNAM., Cto. ext. s/n, Ciudad Universitaria, Coyoacan, Mexico, D.F., 04510, Mexico
AB: We studied the posible effects of atmospheric electric fields, generated in thunderstorms, on the cosmic ray intensity detected at Earth's surface by investigating the variation of the counting rates of the cosmic-ray nucleonic component, obtained from the neutron monitor installed in Mexico City, for thunderstorms during 1996 and 1997. These were years of minimum solar activity. We compare our experimental results with the general theory of cosmic ray meteorological effects by Dorman (1995). The observed intensity variation is about 0.2%. According to Dorman (1995), the effect should be between 0.27% and 0.81% on the counting rate of the neutron monitor when the atmospheric electric field intensities are around 100 to 300 V/cm. Our results show that either the electric field in Mexico City had less intensity than assumed by Dorman (1995), or the electric field is not uniform in time and height during the development of the thunderstorm.
DE: 2104 Cosmic rays
DE: 2712 Electric fields (2411)
DE: 3205 Fourier analysis (3255)
DE: 3255 Spectral analysis (3205, 3280)
DE: 3280 Wavelet transform (3255, 4455)
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2007 Joint Assembly