Search results for "Global changes"
showing 10 items of 533 documents
Influence of grass cover on the leaching of herbicides in Burgundy vineyards.
2008
International audience
Species-specific song convergence in a moving hybrid zone between two passerines
2003
International audience; Moving hybrid zones are receiving increasing attention. However, so far little is known about the proximate mechanisms underlying these movements. Signalling behaviour, by individuals engaged in interspecific sexual and aggressive interactions, may play a crucial role. In this study, we investigated song variation within a moving hybrid zone between two warblers, Hippolais polyglotta and H. icterina . In these species, song is involved in interspecific territoriality and, probably, in mixed pairings. We showed that allopatric populations of the two species are clearly acoustically differentiated. However, interspecific differences faded out in sympatry as a result of…
Seasonal reproducibility and predictability of the West African Monsoon in coupled GCMs
2009
In the framework of the ENSEMBLES FP6 project, an ensemble prediction system based on five different state-of-the-art European coupled models has been developed. This study evaluates the performance of these models for forecasting the West African monsoon (WAM) at the monthly time scale. From simulations started the 1 May of each year and covering the period 1991–2001, the reproducibility and potential predictability (PP) of key parameters of the WAM—rainfall, zonal and meridional wind at four levels from the surface to 200 hPa, and specific humidity, from July to September—are assessed. The Sahelian rainfall mode of variability is not accurately reproduced contrary to the Guinean rainfall …
Using Global Radiation Model to Simulate Surface Temperature Impact on Snow Melt - Loven Glacier – Spitsberg
2009
International audience
La sensibilité des communautés microbiennes à une augmentation de la température augmente quand la biodégradabilité de la ressource organique baisse
2014
La sensibilité des communautés microbiennes à une augmentation de la température augmente quand la biodégradabilité de la ressource organique baisse. 12. Journées d'Etude des Sols
Multi-scale study of the rainy season onset over the Sudano-Sahelian belt: Spatial coherence and potential predictability
2011
The spatial coherence of boreal monsoon onset (July-September) over the western and central Sahel is studied through the analysis of daily rainfall records for 136 rain-gauges from 1950-2000. Onset of the rainy season has been defined using 3 definitions which rely on 3 overlapped spatial scales: (i) the regional scale, i.e. the northward ITCZ jump from Guinean to Soudano-Sahelian latitudes, (ii) the meso-scale related with the first occurrence of the main rainfall-generating phenomenon, that is squall line and (iii) the local-scale of the first rainfall recorded at the rain-gauge. Local and meso-scale onsets show a weak degree of instantaneous and inter-annual spatial coherence, meaning th…
Étude du paléoclimat ordovicien (440 millions d'années) à travers l'enregistrement de la dynamique des glaciers au Niger.
2008
6 pages; National audience
Shallow groundwater exposure to antibiotic resistant Escherichia coli: hydrogeochemical approach to identify sources and transfer pathways
2015
International audience; Antimicrobial resistance is a growing public health concern in European hospitals and communities. Escherichia coli is one of the most common agents of bacterial infection which causes urinary tract infections as well as more serious infections. E. coli resistance to major antibiotics classes is increasing worldwide.The aim of the project is to investigate the prevalence of extended-spectrum beta-lactamase (ESBL) producing E. coli in waste water treatment plants in the Burgundy region and to monitor the impact of treated effluents and sludge on water quality in the Ouche watershed near Dijon (East-central part of France). CTX-M is a recently occurring ESBL, encoded b…
Il sito neolitico e protostorico del Châtelard de Bourg-Saint-Maurice (Savoia): insediamento a carattere defensivo e zona sepolcrale al piede del col…
2007
A detailed record of recent climatic changes in a laminated lake record in the Sahel
2009
International audience