HR: 17:30h
AN: U42B-07 INVITED     [PDF]
TI: Solar Activity and Climate - in Light of the Decay of the Dipole
AU: * Friis-Christensen, E
EM: efc@dsri.dk
AF: Danish Space Research Institute, Juliane Maries Vej 30, Copenhagen, DK-2100 Denmark
AB: The geological history shows that climate has always been changing. The climate is the result of very complex interactions between various atmospheric processes, which are not well understood. Variations in solar activity seem to have a significant - but not simple - effect on climate. Recently it has been suggested that solar activity modulation of cosmic rays influences the formation and properties of clouds and thereby the radiation balance of the Earth. This topic was selected as one of six 'Areas to Watch in 2003' in the 20th December 2002 edition of Science. Since the Earth's magnetic field also has a modulating effect on the cosmic ray flux into the atmosphere, one might expect an effect on climate as well. A review of solar activity variations and climate changes will be given with emphasis on those aspects that may be affected by the varying geomagnetic field.
DE: 0320 Cloud physics and chemistry
DE: 1560 Time variations--secular and long term
DE: 1600 GLOBAL CHANGE (New category)
DE: 1650 Solar variability
DE: 2104 Cosmic rays
SC: U
MN: 2003 Fall Meeting