Search results for "Séquences sèches"
showing 3 items of 3 documents
Multiscale study of rainfall and vegetation cover in Cameroon : spatial analysis, temporal trends, climatic and anthropogenic factors of NDVI variabi…
2011
Due to its shape and location (2°N-13°N – 8°E-16°E; proximity of the Atlantic Ocean), Cameroon is characterized by a panel of cross-regional climate encountered widely in tropical Africa. Over the region, the decrease rainfall during the second half of the last century has been shown to be associated with stronger recurrence of drier periods, specifically in the core of the rainy season. These conditions have favored the degradation of vegetation cover, driven by socioeconomic and demographic constraints. The substantial impacts on human activities and local society highlight the need to better understand how climate and environmental dynamics do interact locally. The aim of this study is t…
Variabilité intrasaisonnière des précipitations et de leur distribution : impacts sur le développement du couvert végétal dans le Nord du Cameroun (1…
2010
variabilité, séquences sèches, précipitations, intrasaisonnier, végétation, Nord-Cameroun; International audience; La variabilité intrasaisonnière des précipitations est étudiée dans le Nord-Cameroun (6°N-13°N et 11°E-16°E), à partir des données journalières d'une vingtaine de stations, ainsi que leur relation avec la variabilité du couvert végétal, à travers les données bimensuelles de NDVI (Normalized Difference Vegetation Index) à 8Km de résolution, le tout sur la période 1982-2002. En domaine soudanien (situé au sud du 9°N), la saison des pluies (Pmensuel>50mm) s'étend entre les mois d'avril à octobre, et entre Mai à septembre en domaine sahélien (nord du 9°N). Dans l'ensemble, les anom…
Étude multi-échelles des précipitations et du couvert végétal au Cameroun : Analyses spatiales, tendances temporelles, facteurs climatiques et anthro…
2011
Due to its shape and location (2°N-13°N - 8°E-16°E; proximity of the Atlantic Ocean), Cameroon is characterized by a panel of cross-regional climate encountered widely in tropical Africa. Over the region, the decrease rainfall during the second half of the last century has been shown to be associated with stronger recurrence of drier periods, specifically in the core of the rainy season. These conditions have favored the degradation of vegetation cover, driven by socioeconomic and demographic constraints. The substantial impacts on human activities and local society highlight the need to better understand how climate and environmental dynamics do interact locally. The aim of this study is t…