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  • Africa ; Climate ; Climatic variability ; Drought ; Man-environment relations ; Morocco ; Twentieth Century ; West Africa
  • The paper presents the results of research dealing with climate variability in north west Africa (Maroc). The droughts in the last 30 years of XX century are studied. - (BJ)
  • From the analysis of rainfall variability, it is possible to identify ruptures of stationnarity (for example the end of 1970's) in the forest area of Haut-Sassandra (mid-west of the Côte d'Ivoire) which correspond certainly to significant variations
  • of the West African climate but also to significant modifications of regional land cover studied by SPOT imagery. - (BJ)
  • Africa ; Agriculture ; Agronomy ; Climate fluctuation ; Crop yield ; Impact ; Monsoon ; Rainfall ; Sahel ; West Africa
  • West African Sahel depends mainly on rain fed agriculture. Rainfall available for this agriculture is concentrated in a very short-time range leading to an extreme sensitivity of yield to monsoon fluctuations at different time-scales. The aim
  • Africa ; Intertropical convergence ; Monsoon ; Spring ; Summer ; Tropical zone ; West Africa ; Years 1970-79 ; Years 1980-89
  • The onset of the monsoon system over West Africa is linked to the northward excursion of the Intertropical Convergence Zone (ITCZ) during the northern spring and summer. By using a daily gridded rainfall dataset over the 1968-1990 period, we have
  • In the paper bioclimatic differentiation of the Polish coast of the Baltic Sea is discussed. Bioclimatic conditions were assessed with the use of new biothermal-and-meteorological weather classification. Significant differences between west, central
  • 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
  • Decreasing significant trends (1950-2000) do not affect French mediterranean rainfall, except during few months : March (West of the Rhône river), November or October (East of the river), and November (Rhône valley). They correspond to significant
  • Benin ; Climatic variability ; Interannual variability ; Precipitation ; Rainfall regime ; West Africa ; Years 1940-49 ; Years 1970-79 ; Years 1990-99
  • with chosen meteorological characteristics. The comparison suggests strong correlation between seasonal (wintertime) increase of measured compounds concentrations and the West direction of air mass movement. - (BJ)