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  • We have studied the meteorological drought and the agricultural drought. We note more than 50 % of a deficit years. From the pluviometric limits of these four ranges (moderated year, drought year, very drought and hyper-drought), four maps were
  • During 5 winters, the evolution of spatial patterns in the snow and ice cover of a lake are observed and simulated. The ice-on and ice-off dates are sensitive to climatic variations but not the mean depth of ice : model and observations reveal more
  • is more important over land than over sea. - (BJ)
  • More than half of the forests of Tunisia are in the North-West of the country where forest fires happen mainly during summer. The variations of fires (numbers and burnt surfaces) have been compared from 1990 to 2001 with the variability
  • The rainfall event happened on September 2000 the 19th over Marseille (France) belongs to the extreme ones. A meso-scale map of the spatial distribution of the precipitation totals with a core where more than 200 mm has fallen has been drawn
  • A method of smoothing solar data by beta probality distributions is applied to process daily sunshine duration data recorded at thirty-three meteorological stations in Algeria for eleven year periods or more. Knowing the sunshine duration data
  • that unfavourable biothermic conditions for the human body are more frequent in the warm half of the year. - (BJ)
  • salinisation, especially when rainfall decreases and/or temperatures increase. On the other hand, the risk of eutrophisation is the more preoccupying in Sidi Salem, especially when contributions of water regress. - (BJ)