Search results for "Universe"
showing 10 items of 2171 documents
Agrégation des données de températures en Bourgogne : Sensibilité aux échelles de temps.
2010
SOUMIS; L'étude de la variabilité spatiale du climat ou de potentialités agricoles nécessite des champs continus de variables climatiques. Les températures sont mesurées de façon ponctuelle par des stations météorologiques. Il est donc nécessaire d'agréger ces données dans l'espace c'est-à-dire d'estimer la valeur de la variable ‘température' en tous points de la région d'étude (la Bourgogne, France). Dans ce but, une méthode déterministe est utilisée : les splines partielles en plaque mince Elle est appliquée pour les années 1991 et 2003, aux pas de temps annuel, mensuel et quotidien. L'altitude est intégrée dans la procédure d'interpolation, comme covariable environnementale. La performan…
About the potential role of desert dust in the West African meningitis epidemics
2007
Cohérence spatiale et prévisibilité potentielle du démarrage de la saison des pluies en Afrique soudano-sahélienne
2010
In-Water Reflectance Spectra Measured On Board a Jet-Ski Across a Complex Nearshore Zone of Case-2 Waters during the ECORS Experiment
2008
International audience
Zonal circulations over the Indian and Pacific oceans and the level of lakes Victoria and Tanganyika.
2004
International audience
Climate-related activities within the Southern African Development Community (SADC) region.
2012
4 pages; International audience
Advances in the analyses of dust/climate and meningitis relationships based on a multidisciplinary approach
2009
International audience
Étude isotopique et spatialisation du dioxyde de carbone dans l'agglomération dijonnaise.
2005
International audience
Analyse de la répartition spatiale des concentrations d'ozone en Bourgogne
2005
National audience; ABSTRACT : A series of measurements by passive tubes with diffusion were carried out in August 2000 on all the Burgundy area in order to try to better understand the spatial patterns of ozone at regional scale. As expected, the results showed difference between night and day. In addition ozone variability is associated to spatial and temporal scales. We assumed that ozone concentrations is the additive combination of two main sources: a "low frequency" signal due to external forcing and a high frequency signal from local origin. Spatial correlations were characterised by the experimental and the modelled semivariogram. Spatial correlations are strongly anisotropic. The an…
Wet periods along the East Africa Coast and the extreme wet spell event of October 1997
2008
Extreme wet spells affect the East Africa Coast (EAC) during March to June (long rains) and October to December (short rains). While these spells are less frequent during the short rains, some of the most extreme wet spells occur at this time of the year. The present study examined the general characteristics of the wet spells during the short rains. A detailed study of the anomalous wet spell event of October 1997, with record rainfall around Mombasa (4.0°S, 39.6°E), was also carried out. Daily rainfall for 1962-1997 and NCEP2 reanalysis data for 1979-1997 were used to study the characteristics of the wet events. A high spatial coherence is found in the rainfall over the EAC. The circulati…