inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (38 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Controls on sorted patterned-ground geometry in the Swiss Alps
  • Alps (The) ; Freeze-thaw cycle ; Lithology ; Mountain ; Patterned ground ; Periglacial features ; Spatial distribution ; Switzerland
  • This paper represents results of field investigations on the distribution, morphology and structure of patterned ground formed on alpine slopes in the Swiss Alps, focusing on factors affecting the spacing of patterned ground. The study area lies
  • 2000
  • Active layer ; Arctic Region ; Cold area ; Ice wedges ; Palaeogeography ; Patterned ground ; Periglacial features ; Permafrost ; Soil temperature ; Stratigraphy
  • 2000
  • Antarctica ; Arctic Region ; Bibliography ; Biogeography ; Canada ; Climatic variation ; Cold area ; Exploration ; Glacial features ; Greenland ; Nunavut ; Patterned ground ; Polar region ; Theory
  • 2000
  • Within-slope variability of ground heat flux, subarctic Yukon
  • This study examined local variability of heat flux within a north-facing hillslope in Wolf Creek basin, Yukon, during the thawed season of 1997. Ground heat flux was calculated by : 1) assessing vertical conduction and convection inputs using
  • nearsurface temperature gradients and rainfall and 2) combining the sensible heat from ground temperature change with the latent heat associated with melting ground ice. Discussion of the effectiveness of these 2 approaches in determining ground heat flux
  • 2000
  • The geologic basis for a reconstruction of a grounded ice sheet in McMurdo Sound, Antarctica, at the Last Glacial Maximum
  • The overall results in this paper afford a background for interpreting the glacial chronology of eastern Taylor Valley and for reconstructing a grounded ice sheet in the overall Ross Embayment at the Last Glacial Maximum (LGM)
  • 2000
  • Frozen ground phenomena in the vicinity of Terra Nova Bay, Northern Victoria land, Antarctica : a preliminary report
  • Antarctica ; Frost action ; Frozen ground ; Ice wedge ; Microrelief ; Periglacial features ; Permafrost
  • Frozen ground phenomena in the Northern Foothills, Northern Victoria Land, include large-scale polygons, 15-20 m in diameter, and small frost mounds, 1-5 m high. The polygons are most widespread on terrain formed upon Younger Drift and are usually
  • 2000
  • During the Last Glacial Maximum, a coalescent ice mass consisting of the grounded Ross Sea ice sheet and an expanded Wilson Piedmont Glacier covered the southern Scott Coast. Based on marine deposits, features of marine erosion, radiocarbon dates
  • of raised beaches, marine shells, lacustrine algae, most recession of grounded ice in Ross Sea Embayment occurred in mid to late Holocene time, after deglacial sea-level rise due to melting of Northern Hemisphere ice sheets essentially was accomplished
  • . Rising sea level alone could not have driven grounding-line retreat back to the present-day Siple Coast.
  • 2000
  • Further statistics on the distribution of permafrost and ground ice in the Northern hemisphere
  • Arctic Region ; Canada ; Cold area ; Ground ice ; Northern hemisphere ; Periglacial features ; Permafrost ; Spatial distribution ; Statistics
  • 2000
  • Arctic Region ; Canada ; Geophysics ; Glacier fluctuation ; Ground ice ; Ice ; Periglacial features ; Remote sensing ; Thermokarst
  • and permanent snow bank ice are discussed, and specific examples are given from 3 different environments (ice-cored moraines, ice-cored deltas and icings). The impacts of thermokarst and retrogressive thaw flow erosion on the preservation of ground ice are also
  • 2000
  • investigates the influences on ground water level and composition, changes in soils and micro-relief. Sinking ground water level, acidification of soils and drying out of vegetation are the most important results of anthropological impacts. - (HPB)
  • 2000
  • Grounding hierarchies of acceptance : the social construction of disability in NIMBY conflicts
  • 2000
  • Excessive mining and mining industry in GDR times resulted in a considerable lowering of the ground water table and contamination of the ground and flowing waters with the effect of undersupply of potable water for the inhabitants in the area. So
  • 2000
  • Evidence from Taylor Valley for a grounded ice sheet in the Ross Sea, Antarctica
  • 2000
  • Biosphere ; Carbon cycle ; Carbon dioxide ; Ecosystem ; Forest ; Global change ; Ground survey ; Modelling ; Remote sensing ; Tropical rain forest
  • 2000
  • Radiocarbon chronology of Ross Sea drift, eastern Taylor Valley, Antarctica : evidence for a grounded ice sheet in the Ross Sea at the Last Glacial Maximum
  • Valley and from shells from McMurdo Sound suggests grounding-line retreat from the vicinity of Ross island between 6500 and 8340 C 14 yr BP. Rising sea level may have triggered internal mechanisms within the ice sheet that led to retreat, but did
  • 2000
  • Boundary ; Ground ice ; Hungary ; Ice wedge ; Palaeoclimatology ; Periglacial features ; Permafrost ; Pleistocene
  • 2000
  • Barchan ; Bibliography ; Fluvial processes ; Fractal geometry ; Geographical information system ; Geomorphometry ; Ground survey ; Hydrogeology ; Japan ; Landslide ; Numerical model ; Quantitative analysis ; Sea floor ; Sea ice ; Topography ; Wind
  • 2000
  • regeneration, and restoration on evapotranspiration, ground heat flux, net ecosystem CO2 exchange, and the atmosphere-peatland exchange of CH4.
  • 2000
  • Californians became believers in a culture of prevention grounded in societal confidence that people can control the natural world with science and technology.
  • 2000
  • This paper describes glacial drift at Cape Bird, located near the northern tip of Ross Island, that points to ice-surface elevations in excess of 590 m in north-eastern McMurdo Sound, consistent with the model of extensive grounded ice at the Last
  • 2000