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Résultats de la recherche (25 résultats)

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Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Structure and porosity of smectitic mudrocks as affected by experimental wetting-drying cycles and freezing-thawing cycles
  • Badland ; Clay mineral ; Drought ; Erosion rate ; Experimentation ; Freeze-thaw cycle ; Micromorphology ; Moisture ; Porosity ; Pyrénées ; Sedimentary rock ; Soil erosion ; Spain ; Weathering
  • , laboratory experiments were carried out to investigate how freezing-thawing or wetting-drying cycles, under controlled conditions, affect structure and porosity. Data from wetting-drying cycles showed that changes in water content alone did not produce deep
  • structural modifications. A mechanism of alteration of soil sructure during freezing-thawing cycles is proposed.
  • 1996
  • Arctic Region ; Climatic warming ; Cold area ; Ecosystem ; Freeze-thaw cycle ; Global change ; Holocene ; Impact ; Pedogenesis ; Periglacial features ; Permafrost ; Soil ; Soil properties
  • The paper deals with the following subjects : 1. Thawing of permafrost landscapes and changes in soil development 2. Ecological aspects of permafrost change 3. Reconstruction of holocene events - learning from the past. - (MT)
  • 1996
  • Chemical alteration ; Freeze-thaw cycle ; Moisture ; Porosity ; Salt ; Sandstone ; Simulation ; Weathering
  • In this study, a series of experiments on sandstone and dolerite was undertaken in an attempt to elucidate the effects due to wetting and drying resulting from the apportionment of water to rock samples in the manner used in many freeze-thaw
  • 1996
  • Argentina ; Calcrete ; Cryoturbation ; Freeze-thaw cycle ; Ice wedge ; Ice wedges ; Patagonia ; Patterned ground ; Periglacial features ; Quaternary ; Sedimentary structure
  • 1996
  • This paper describes an experimental design for large-scale physical modelling to measure and record the timing and rate of: frost penetration; surface frost heaving; thaw penetration; porewater pressure changes; and downslope surface soil
  • 1996
  • Aerial photography ; Cold area ; Freeze-thaw cycle ; Glacial features ; Greenland ; Meander ; Meltwater ; Moraine ; Sedimentary structure
  • 1996
  • Creep ; Freeze-thaw cycle ; Freezing ; High mountain ; Honshu ; Japan ; Mountain ; Precipitation ; Slope ; Soil ; Soil moisture ; Soil temperature
  • 1996
  • China ; Freeze-thaw cycle ; Gelifluction ; High mountain ; Mass movement ; Mountain ; Periglacial features ; Rock glacier ; Slope dynamics ; Tien Shan
  • 1996
  • Cold area ; Cryoturbation ; Experimentation ; Freeze-thaw cycle ; Microstructure ; Palaeogeography ; Palsa ; Periglacial features ; Permafrost ; Pingo ; Pleistocene ; Soil wedge polygon
  • 1996
  • Air temperature ; Climatic warming ; Cold area ; Global change ; Heat flow ; Model ; Permafrost ; Soil temperature ; Thawing
  • 1996
  • Climate ; Climatic data ; Freeze-thaw cycle ; Ground freezing ; Meltwater ; Michigan ; Model ; Pedogenesis ; Podsolisation ; Snow ; Soil water ; United States of America ; Wisconsin
  • 1996
  • Active layer ; Alps (The) ; Creep ; Freeze-thaw cycle ; Geophysics ; Model ; Mountain ; Nivation ; Periglacial features ; Permafrost ; Rock glacier ; Soil temperature ; Switzerland
  • 1996
  • Arctic Region ; Asian part of Russia ; Cold area ; Eastern Siberia ; Freeze-thaw cycle ; Geomorphology ; Mountain ; Permafrost ; Snow ; Tundra
  • 1996
  • Applied geomorphology ; Catastrophe ; China ; Classification ; Debris flow ; Desertification ; Dust storm ; Earthquake ; Forest fire ; Freeze-thaw cycle ; Human impact ; Natural hazards ; Soil erosion ; Tropical cyclone ; Tsunami
  • 1996
  • Biogenic process ; Creep ; Forest ; France ; Freeze-thaw cycle ; Granite ; Periglacial features ; Slope ; Slope dynamics ; Soil ; Soil moisture ; Soil properties ; Temperature ; Vosges
  • 1996
  • Aggregate ; Agricultural practice ; Arid area ; Clay mineral ; Freeze-thaw cycle ; Israel ; Organic materials ; Seasonal variation ; Soil ; Soil moisture ; Soil properties ; Soil temperature
  • 1996
  • aligned to flow traces, and basal condition (frozen bed/thawed bed) inferred from morphology.
  • 1996
  • Chemical erosion ; Clay mineral ; Cold area ; Deglaciation ; Experimentation ; Freeze-thaw cycle ; Geomorphogenesis ; Grain size distribution ; Model ; Norway ; Weathering
  • 1996
  • California ; Debris flow ; Earthquake ; Freeze-thaw cycle ; Glaciation ; Human impact ; Landslide ; Mass movement ; Postglacial ; Precipitation ; Quaternary ; Rainstorm ; Rockfall ; Sierra Nevada ; Slope ; Slope dynamics ; United States of America
  • 1996
  • Active layer ; Arctic Region ; Canada ; Carbonate rock ; Chalk ; Cold area ; England ; Ground ice ; Kent ; Permafrost ; Pleistocene ; Quaternary ; Spitsbergen ; Svalbard ; Thawing ; United Kingdom
  • 1996