inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (50 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Relict sorted patterned ground in Rostu, northernmost Sweden
  • C 14 dating ; Cold area ; Deglaciation ; Patterned ground ; Periglacial features ; Quaternary ; Spatial variation ; Stratigraphy ; Sweden
  • The objective of this study is to determine the age of active periods in relict sorted patterned ground on Rostu by studies of internal structures, spatial analysis and radiometric datings.
  • 1996
  • Arctic Region ; Cold area ; Gley ; Grain size distribution ; Microrelief ; Patterned ground ; Plant canopy ; Soil ; Soil properties ; Solifluction ; Spitsbergen ; Svalbard
  • The following patterning of the ground surface was observed in the Bellsund region: sorted circles, mud boils, cell forms, solifluction (striped) forms and large polygons (tundra polygons). The soils associated with these forms often have different
  • 1996
  • Formation of miniature sorted patterns by shallow ground freezing: a field experiment
  • Experimentation ; Freeze-thaw cycle ; Freezing ; Ground freezing ; Ice ; Patterned ground ; Scotland ; Soil ; Soil properties ; United Kingdom
  • 1996
  • The study area displays well developed periglacial forms with solifluction tongues, patterned ground and numerous active, inactive and relict rockglaciers. In order to investigate frost frequency and to map permafrost distribution
  • and characteristics (active layer thickness, ice-content, permafrost temperatures), geophysical soundings and continuous ground temperature measurements have been made at altitudes between 2660 and 3250 m a.s.l. in the discontinuous permafrost belt. Based
  • 1996
  • The vertical distribution of the wind-blown sand flux in a 40 cm low layer above the ground surface was investigated through laboratory wind-tunnel tests and field measurements on the mobile dune surface during sand storms in the Taklamakan Desert
  • . The objectives were: to determine the effect of wind velocity on the distribution pattern of wind-blown sand flow; to examine the properties of the discontinuous function of the transport rate with height; and to develop an equation for expressing the vertical
  • distribution and predicting the total sediment transport quantity of wind-blown sand flux near the ground surface.
  • 1996
  • Africa ; Archaeology ; Cameroon ; Congo ; Erosion surface ; Gabon ; Geomorphogenesis ; Palaeolithic ; Patterned ground
  • 1996
  • Argentina ; Calcrete ; Cryoturbation ; Freeze-thaw cycle ; Ice wedge ; Ice wedges ; Patagonia ; Patterned ground ; Periglacial features ; Quaternary ; Sedimentary structure
  • 1996
  • Cold area ; Deglaciation ; Drumlin ; Esker ; Frozen ground ; Geochronology ; Glacial features ; Inland ice ; Meltwater ; Model ; Palaeo-environment ; Sweden
  • The article discusses the nature of the glacial inversion problem, which is defined as the extraction of time-slice ice-sheet flow patterns from the patchy and partly overprinted landform record present in former ice-sheet areas. A coherent
  • inversion model for derivation of flow patterns and interior ice-sheet configuration from geomorphological data is presented. Glacial landscapes are classified according to the three criteria of internal age gradients, presence or absence of meltwater traces
  • 1996
  • The viscous flow patterns characteristic of rock glaciers are caused by the long-term (i.e. Holocene) existence of a thick and continuous perennially frozen layer supersatured with ice. The variability over several orders of magnitude
  • of the electrical DC resistivity indicates that the corresponding ground ice may have multiple origins. The change in DC resistivity probably reflects a) the warming of permafrost through creep movements from colder to warmer areas, and b) the replacement of high
  • 1996
  • Aerial photography ; Canada ; Differential erosion ; Erratic boulder ; Glacial erosion ; Glacial features ; Kettle ; Nivation hollow ; Patterned ground ; Periglacial features ; Permafrost ; Photointerpretation ; Quebec ; Snow ; Tundra ; Vegetation
  • 1996
  • Cold area ; Cryoturbation ; Eastern Siberia ; Geochemistry ; Palaeo-environment ; Palaeosol ; Patterned ground ; Pedogenesis ; Permafrost ; Polar region ; Russia ; Sakha ; Tundra
  • 1996
  • Refiguring geography: parish maps of common ground
  • The Parish Maps Project, initiated by the environment and arts group Common Ground, raises questions around the social role of mapping and the production of local knowledge. The work and philosophy of Common Ground are introduced and the key themes
  • 1996
  • Evaluation of natural surfaces in a dry tropical environment by remote sensing and ground survey
  • Ground survey ; Inventory ; Land use ; Mauritania ; Pastoral ; Remote sensing ; Sahel ; Sampling ; Satellite imagery ; Vegetation
  • 1996
  • Oil derricks and Corinthian columns : the industrial transformation of the Oklahoma State Capitol grounds
  • the Capitol grounds as Governor Marland, a former oil tycoon, insisted in 1936 that the State exploit the oil in there. After drilling began there, an election was held to include the Capitol grounds in the oil zoning of the Oklahoma City Oil Field. In 1980s
  • 1996
  • C 14 dating of trapped gases in massive ground ice, Western Canadian Arctic
  • Arctic Region ; C 14 dating ; Canada ; Carbon dioxide ; Dating ; Ground ice ; Ice ; Methodology
  • 1996
  • Meteorological analysis of daily maximum ground-level ozone for the Niagara Region
  • Ground-level ozone has become a problem of major concern in urban airsheds in Canada, owing to its adverse effects on humans and crops. Several studies have examined the relationship between maximum concentrations and key meteorological variables
  • 1996
  • Deep-seated creep of massive ground ice, Tuktoyaktuk, NWT, Canada
  • International Permafrost Association Workshop on frozen ground
  • Canada ; Cold area ; Creep ; Ground ice ; Ice ; Northwest Territories ; Permafrost ; Seasonal variation ; Slope ; Slope dynamics ; Soil temperature
  • 1996
  • A simple portable device for the measurement of ground loss and surface changes
  • 1996
  • The global city thesis holds that the restructuring of the economies of dominant cities in the global urban hierarchy causes social polarisation. C. Hamnett criticises this thesis on theoretical and empirical grounds: he thinks
  • 1996
  • Measurement interval and the accurate assessment of ground temperature trends
  • International Permafrost Association Workshop on frozen ground
  • 1996