Search results for "changes"
showing 10 items of 901 documents
A history of mining activity in Celtic Aeduan territory, and its environmental impact (Morvan-France)
2003
International audience
Looking inside rodent teeth: δ18O analysis used to reconstruct the environment of MIS 3 in Northeastern Iberia
2018
International audience; Small mammals (insectivores, bats and rodents) are one of the most useful tools to reconstruct Quaternary environment. Recent studies have demonstrated the relation between the stable oxygen isotopes (mainly δ18O) from biogenetic phosphates from rodent teeth with the δ18O from meteoric water; that at the same time can be potentially related with palaeotemperatures. This work explores the palaeoenvironment reconstructions based on the δ18O composition of phosphates from enamel of rodent teeth (mainly Murinae and Arvicolinae) to approach to the Marine Isotope Stage 3 (ca. 60-30 ka) in Northeastern Iberia. Fourteen new δ18O analyses from current samples are presented, c…
Mise en évidence de crues antiques sur le site gallo-romain d’Oedenburg.
2003
International audience
Application des méthodes de datation physique à l'archéologie du bâti
2011
L'intégration des méthodes de datation des matériaux de construction à l'archéologie du bâti permet d'envisager des gains informatifs qualitatif et quantitatif pour l'histoire de la construction des bâtiments. Afin d'examiner la chronologie de monuments historiques et de considérer la question de l'origine de leurs matériaux de construction, un groupe de recherche CNRS européen (GdRE) intitulé "Terres cuites architecturales et nouvelles méthodes de datation" s'est impliqué dans l'étude archéologique d'édifices médiévaux situés autour de l'an mil, en France, en Italie et en Angleterre, et présentant des éléments de terre cuite dans leurs maçonneries. L'objectif de ce GdRE est de rassembler d…
Environmental impact of early palaeometallurgy: pollen and geochemical analysis
2004
International audience
Dealing with river hazards in urban environments. Strategies and impacts of the LIA in Burgundian towns revealed through archives and underwater arch…
2023
Handling river risks is crucial within urban environment, whether it has concerned one-off events or long-term evolution. Riverine inhabitants and authorities had to struggle with different temporal rhythms, dealing either with isolated events, as floods or ice jams, or long-term river migration.An ongoing postdoctoral project, dealing with the impact of the LIA on Burgundian rivers in France, following multidisciplinary research programs on the Middle Loire River, bring opportunities to discuss the way riverside towns have dealt with river instability. It also enlightens the differences in rivers changes. On the Loire River, geomorphological analyses of the floodplain mostly underline the …
Effets des émissions anthropiques de gaz à effet de serre sur le climat du bassin de l'océan Indien
2005
La simulation numérique du climat par le modèle couplé de circulation générale ARPEGE-OPA est utilisée ici pour prédire les effets d'un doublement du CO2 atmosphérique en l'an 2100 sur le climat du bassin de l'Océan Indien. Les températures de surface de la mer, les précipitations et les champs moyens de vents à 850 et 200 hPa sont étudiés au pas de temps trimestriel, sur les deux normales climatiques 1968-1997 et 2070-2099. Pour la fin du XX° siècle, le modèle a tendance à surestimer légèrement les TSM et plus fortement les précipitations, résultat d'un cycle hydrologique simulé trop développé. L'extraction d'indices pluviométriques calculés sur des régions homogènes montre que les télécon…
Dynamics of copper and zinc sedimentation in a lagooning system receiving landfill leachate.
2013
9 pages; International audience; This study characterises the sediment dredged from a lagooning system composed of a settling pond and three lagoons that receive leachates from a municipal solid waste (MSW) landfill in France. Organic carbon, carbonate, iron oxyhydroxides, copper (Cu) and zinc (Zn) concentrations were measured in the sediment collected from upstream to downstream in the lagooning system. In order to complete our investigation of sedimentation mechanisms, leachates were sampled in both dry (spring) and wet (winter) seasonal conditions. Precipitation of calcite and amorphous Fe-oxyhydroxides and sedimentation of organic matter occurred in the settling pond. Since different di…
The playa environments of the Lodève Permian basin (Languedoc-France).
2008
28 pages; International audience; The Lodève Permian synrift sequence is represented by thick stacked climate-controled playa cycles which have been constrained by structural, sedimentological, geochemical and paleontological processes. The present paper merges the different results in order to better constrain the dynamics and palaeoecologycal evolution of the playa system from Late Cisuralian to Early Lopingian time. In this depositional environment, thining upwards sheet-flood sequences represent flooding events; they are relayed by ephemeral ponding, suspension settling and limited carbonate precipitation accompanied by large amounts of shallow to subaerial sedimentary structures (curre…
Les impacts du campagnol terrestre sur les systèmes fourragers : le cas de l’élevage bovin allaitant en Bourgogne
2014
EAAgroSupECOLDUR; Do vole outbreaks have the same effects on suckler beef farms in Burgundy as they do on daily farms in Auvergne and Franche-Comte? Semi-structured interviews were carried out with 19 farmers from Burgundy who had been affected by a water vole outbreak in 2011. The results indicate that, just like farmers in Auvergne and Franche-Comte, farmers in Burgundy witnessed a decrease in forage quantity and quality. Farmers used diverse measures to deal with the outbreak (e.g., avoidance strategies or the use of bromadiolone). Farmers that described water voles as pests were more likely to have used bromadiolone, while those who described water voles in morphological terms or in ter…