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PORTAIL D'INFORMATION GÉOGRAPHIQUE

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  • Aeolian features ; Aeolian transport ; Arid area ; California ; Climatic variability ; Climatic variation ; Desert ; Plant cover ; Precipitation ; Semi-arid area ; Soil moisture ; United States of America
  • and geomorphic record of Holocene eolian activity. At both time scales, eolian activity in southern Californian deserts is strongly controlled by variations in precipitation. Remobilization of existing dormant dunes is a product of reduced vegetation cover
  • and soil moisture in periods of drier climates. The major control on these processes is decadal to annual changes in rainfal that determine vegetation cover and soil moisture content.
  • Aeolian features ; Atmospheric circulation ; Climate ; Climatic variability ; Climatic variation ; Flood ; Geomorphology ; Impact ; Plant cover ; Quaternary ; Slope dynamics ; Soil erosion
  • Alluvial cone ; Base level ; Channel geometry ; Climatic variation ; Fluvial dynamics ; Fluvial erosion ; Land use ; Lithology ; Plant cover ; Semi-arid area ; Southern United States ; Stream ; United States of America
  • Arid area ; Arizona ; Base level ; Climatic variability ; Climatic variation ; Ecosystem ; Fluvial processes ; Human impact ; Impact ; Over-grazing ; Plant cover ; River bed ; Semi-arid area ; Soil erosion ; United States of America