Search results for "Universe"
showing 10 items of 2171 documents
Variabilité de la pluviométrie et des écoulements dans le bassin béninois du fleuve Niger
2007
National audience
Interactions tropicales – tempérées et pluviométrie au Mozambique.
2004
International audience
Detecting the West African monsoon onset
2007
International audience
Les phases d'installation de la saison des pluies en régime unimodal: l'exemple du Cameroun et du Bénin
2005
International audience
Relations entre El Niño et précipitations en Afrique australe
2004
National audience
Detection of intra-seasonnal leading signals for the rainfall onset over the Sudanian and Sahelian belts : experimental hindcast
2006
International audience
An OLR based West African monsoon onset index
2007
International audience
Modelling solar radiation patterns for stand-scale studies in complex terrain
2009
International audience; A spatial model has been developed to simulate stand-scale patterns of irradiance over an hilly terrain bounded by a forest. Conceptually, the model is based on semi-empiric radiation equations and efficient viewshed algorithm further improved to account for sloping terrain and the presence of the forest. Model performance was assess on both radiometry and geometry. Comparison shows good agreement with observations. Model experiments were conducted for cloudy-less condition (i.e. at potential) along whole vegetative period of grapevine stand. Anal- ysis of deficit of irradiance for year 2003 shows that patterns are mainly due to the presence of the forest implying stron…
Detection of intraseasonal leading signals for the rainfall onset over the Sudanian and Sahelian belts
2005
International audience
Organic carbon released from carbonates and shales by chemical weathering: implications for the global organic carbon cycle understanding;
2003
We propose in this study an initial estimation of the annual organic matter yield induced by chemical weathering of carbonates and shales considering their global surface at outcrop and their organic matter content. The calculation also uses data on river fluxes resulting from carbonate rocks and shales weathering in major world watersheds, published by numerous authors [1]. The results obtained from the studied watersheds have been extrapolated to a global scale. Despite rather large incertainty inherent to such an approach, the calculated value [2] of ca. 0.1 Gt implies that the annual organic carbon yield related to carbonates and shales chemical weathering might be a non-negligible comp…