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Résultats de la recherche (189 résultats)

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Dynamics of suspended sediment transport and yield in a large agricultural catchment, southwest France
  • Agricultural land use ; Flood ; France ; Gers ; Interannual variability ; Midi-Pyrénées ; Seasonal variability ; Sediment transport ; Suspended load ; Watershed
  • Aprovechamiento agrícola del suelo ; Carga en suspensión ; Crecida ; Cuenca hidrográfica ; Francia ; Transporte sedimentario ; Variabilidad estacional ; Variabilidad interanual
  • The dynamics of suspended sediment transport were monitored continuously in a large agricultural catchment in southwest France from January 2007 to March 2009. The aim of this paper is to analyse the temporal variability in suspended sediment
  • patterns. During the study period, the AA. analysed 17 flood events, with high resolution suspended sediment data derived from continuous turbidity and automatic sampling. The results revealed strong seasonal, annual and inter-annual variability
  • 2010
Variability of snow density measurements in the Río Esera Valley, Pyrenees Mountains, Spain
  • Variability of snow density measurements in the Río Esera Valley, Pyrenees Mountains, Spain
  • Aragón ; High mountain ; Interannual variability ; Mountain ; Pyrénées ; Sampling ; Snow ; Snow cover ; Snow studies ; Spain ; Spatial variation ; Temperature
  • Alta montaña ; Capa nival ; España ; Montaña ; Nieve ; Nivología ; Pirineos ; Selección dela muestra ; Temperatura ; Variabilidad interanual ; Variación espacial
  • 2010
Patterns of climate change across Wisconsin from 1950 to 2006
  • Climate ; Climatic anomaly ; Climatic change ; Climatic data ; Climatic trend ; Ecology ; Interannual variability ; Least squares method ; Precipitation ; Seasonal variability ; Temperature ; United States of America ; Wisconsin
  • Anomalía climática ; Cambio climático ; Clima ; Dato climático ; Ecología ; Método de los minimos cuadrados ; Precipitación ; Temperatura ; Tendencia del clima ; Variabilidad estacional ; Variabilidad interanual
  • Trends in meteorological and ecological variables were calculated across the state of Wisconsin from 1950 to 2006 to quantify recent patterns of climate change. This paper specifically reports changes in annual and seasonal temperatures
  • 2010
Climatic controls on historical wildfires in West Virginia, 1939-2008
  • Climate ; Forest ; Forest fire ; Human impact ; Interannual variability ; Land use ; United States of America ; West Virginia
  • Acción antrópica ; Aprovechamiento del suelo ; Bosque ; Clima ; Incendio forestal ; Variabilidad interanual
  • Here the AA. : (1) summarize historical fire atlases collected by the West Virginia Division of Forestry (1939-2008) in the context of climate and spatial variability; (2) identify the seasonal climatic drivers of fire activity in West Virginia
  • 2010
La nieve en los Picos de Europa : implicaciones geomorfológicas y ambientales
  • Cantabria ; Earth surface processes ; Firn ; Interannual variability ; Karstification ; Rainfall regime ; Snow ; Snow cover ; Soil erosion ; Spain ; Water regime
  • Capa nival ; Erosión de los suelos ; España ; Geomorfodinámica ; Karstificación ; Nevero ; Nieve ; Régimen hídrico ; Régimen pluviométrico ; Variabilidad interanual
  • 2010
Cobertura nival y distribución de las temperaturas en el suelo en las cumbres de la Sierra de Guadarrama
  • Castilla-León ; Interannual variability ; Nivation ; Nivation hollow ; Snow ; Snow cover ; Soil ; Spain ; Spatial distribution ; Temperature
  • Capa nival ; Distribución espacial ; España ; Nicho de nivación ; Nieve ; Nivación ; Suelo ; Temperatura ; Variabilidad interanual
  • 2010
Variation and abrupt change of climate in Ili River Basin, Xinjiang
  • China ; Climate ; Climatic change ; Climatic trend ; Interannual variability ; Precipitation ; Regression analysis ; Statistics ; Temperature ; Watershed ; Xinjiang
  • Análisis de regresión ; Cambio climático ; China ; Clima ; Cuenca hidrográfica ; Estadística ; Precipitación ; Sinkiang ; Temperatura ; Tendencia del clima ; Variabilidad interanual
  • 2010
Évolution de la nappe des sables quaternaires dans la région des Niayes du Sénégal (1958-1994) : relation avec le climat et les impacts anthropiques
  • Aquifer ; Drought ; Evapotranspiration ; Human impact ; Hydrogeology ; Interannual variability ; Piezometric level ; Senegal ; Underground water ; Water balance
  • Acción antrópica ; Agua subterránea ; Balance hidrológico ; Capa acuífera ; Evapotranspiración ; Hidrogeología ; Nivel piezométrico ; Sequía ; Variabilidad interanual
  • 2010
Approche multi-scalaire du démarrage de la saison des pluies au Sahel central et occidental : cohérence spatiale et prévisibilité
  • Africa ; Forecast ; Interannual variability ; Monsoon ; Precipitation ; Rainfall ; Sahel ; Scale ; Season
  • Escala ; Estación ; Lluvia ; Monzón ; Precipitación ; Previsión ; Variabilidad interanual
  • 2010
Solifluction and mudflow on a limestone periglacial slope in the Swiss Alps : 14 years of monitoring
  • ), to discuss the roles of these processes in developing lobate morphology and finally to understand long-term trends and interannual variability in soil movements.
  • 2010
Instalación y uso de un colchón de nieve para la monitorización del manto de nieve. Cuenca Experimental de Izas (Pirineo Central)
  • Aragón ; High mountain ; Interannual variability ; Measurement ; Mountain ; Pyrénées ; Snow ; Snow cover ; Snow studies ; Spain ; Watershed
  • Alta montaña ; Capa nival ; Cuenca hidrográfica ; España ; Medida ; Montaña ; Nieve ; Nivología ; Pirineos ; Variabilidad interanual
  • La densité du manteau nival est l’une des variables hydroclimatiques de montagne les plus difficiles à mesurer. Les coussins à neige sont des instruments de mesure les plus couramment utilisés. Les AA. analysent l’évolution de la densité de neige et
  • 2010
Sea level variability in the eastern part of the Polish Baltic sea coast 1975-2004
  • Sea level variability in the eastern part of the Polish Baltic sea coast 1975-2004
  • Baltic Sea ; Coastal environment ; Poland ; Sea level ; Seasonal variability ; Storm wave
  • This work, based upon the results of 4 tide-gauges : Władysławowo, Hel, Gdynia and Gdansk-Harbour, presents the relative changes of sea level and a determination of its quantitative and qualitative variability in the eastern part of the coast along
  • 2010
Assessing heavy metal contamination in soils of the Zagreb region (Northwest Croatia) using multivariate geostatistics
  • Topsoil samples were collected in the Zagreb area (Northwest Croatia) and the total contents of trace and major elements were determined. A multivariate geostatistical analysis was used to estimate soil chemical composition variability. Factorial
  • Kriging Analysis (FKA) was used to investigate the scale-dependent correlation structure of some variables by modelling co-regionalization of 10 chemical variables, co-kriging specific factors and mapping them. Results and discussion. The methodology used
  • 2010
Comparison of different geostatistical approaches to map climate variables : application to precipitation
  • Comparison of different geostatistical approaches to map climate variables : application to precipitation
  • Pour cartographier une variable climatique, il est toujours nécessaire mais souvent négligé de choisir la technique d'interpolation spatiale la plus appropriée, ce qui suppose une minutieuse comparaison préalable des différentes techniques
  • 2010
A spatial Cliff-Ord-type model with heteroskedastic innovations : small and large sample results
  • Un modèle spatial linéaire de ce type est spécifié. Des décalages spatiaux sont autorisés pour les variables dépendantes, les variables exogènes et les perturbations. Les innovations au cours du processus sont supposées présenter une
  • 2010
Coupling mechanisms in double sandbar systems. Part 2 : impact on alongshore variability of inner-bar rip channels
  • Coupling mechanisms in double sandbar systems. Part 2 : impact on alongshore variability of inner-bar rip channels
  • in favour of the latter with an increase in waterdepth variability along the outer-bar crest. Furthermore, they find that the typical alongshore variability in inner-bar rip-channel scale is indicative of a mixture of self-organization and morphological
  • 2010
Ecogeomorphic state variables and phase-space construction for quantifying the evolution of vegetated aeolian landscapes
  • Ecogeomorphic state variables and phase-space construction for quantifying the evolution of vegetated aeolian landscapes
  • -outs the resulting dune field realizations are investigated as a function of variable growth vigour of 2 simulated vegetation types (pioneer grass and successional woody shrub) by establishing a typological phase-diagram of different landscape classes
  • . The use of landscape state variables and the construction of a 3D phase-space presented here may provide a general template for quantifying many other eco-geomorphic systems on the Earth's surface.
  • 2010
Influence of initial aperture variability on conduit development in hypogene settings
  • Influence of initial aperture variability on conduit development in hypogene settings
  • This work aims to examine the influence of the variability of the initial apertures on dissolutional growth of fissures and the evolving cave systems. To this end, the initial apertures were spatially uncorrelated and lognormally distributed
  • initial apertures. However, with increasing heterogeneity the karstification process decelerates and a significant amount of variability between the different realisations follows.
  • 2010
A new reconstruction of temperature variability in the extra-tropical Northern Hemisphere during the last two millennia
  • A new reconstruction of temperature variability in the extra-tropical Northern Hemisphere during the last two millennia
  • Climate reconstruction ; Climatic variability ; Climatic variation ; Climatic warming ; First Century ; Historical climate ; Little ice age ; Middle Ages ; Northern hemisphere ; Temperature ; Twentieth Century ; World
  • temperature reconstruction. The amplitude of the reconstructed temperature variability on centennial time-scales exceeds 0.6°C. This reconstruction is the first to show a distinct Roman Warm Period c. ad 1–300, reaching up to the 1961–1990 mean temperature
  • 2010
The seasonal variability of population in Estonian municipalities
  • The seasonal variability of population in Estonian municipalities
  • 2010