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  • The effect of man's activities on climatic changes in Evolution des atmosphères planétaires et climatologie de la terre=Evolution of planetary atmospheres and climatology of the earth.
  • Although considerable uncertainties remain, state-of-the-art climatic theories suggest that major global climatic changes due to human activities are possible as soon as the end of this century.
  • Exceptional meteorological fluctuations in Europe since 1393 selected by dates of the wine harvest and their relationship to solar activity in Evolution des atmosphères planétaires et climatologie de la terre=Evolution of planetary atmospheres
  • A new examination of the frequency curves of aurorae and of cometary discoveries since AD 0 led us to the conclusion that during 12 of the 16 centuries (75%) the trends of solar activity and zonal circulation on the Earth (30-55N) were of the same