inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (240 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Structural variation and dynamics of lodgepole pine forests in Lassen Volcanic National Park, California
  • Biogeography ; California ; Climatic variability ; Forest ; Microclimate ; National park ; Pine ; Soil properties ; United States ; Vegetation dynamics
  • Diameter structure, age/diameter regressions, and stem dispersion patterns reveal spatial variability in lodgepole pine forest structure and dynamics in Lassen Volcanic National Park (LVNP). Spatial variability in this early successional species
  • 1993
  • Catastrophe theory ; Division of labour ; Economic structure ; Labour productivity ; Production fonction ; System dynamics ; Theory ; Urban dynamics ; Urbanization
  • The dynamic of urbanization can be produced by the transition from a low level stable equilibrium to a high level stable equilibrium corresponding to a cusp catastrophe. An economic theory yielding this type of dynamic is discussed, formalized
  • 1993
  • The Tana river forests, Kenya : small, dynamic, and endangered
  • Biogeography ; Ecosystem ; Flood ; Floodplain ; Forest ; Kenya ; Nature conservation ; Stream ; Traveller's tale ; Vegetation dynamics
  • 1993
  • Accessibility ; Bifurcation ; Consumer behaviour ; Spatial analysis ; Spatial dynamics ; Spatial equilibrium ; Spatial interaction ; Transport cost
  • The A. distinguishes between implied dynamics (change is analysed through an examination of the parameter space of a static model) and absolute dynamics (time is explicitly included in the specification). This review charts the development of both
  • 1993
  • Modelling the dynamics of ice sheets
  • Antarctica ; Cold area ; Glacier dynamics ; Glaciology ; Global change ; Ice sheet ; Model ; Sea level ; Temperature
  • Although the mechanics and qualitative dynamics of grounded ice sheets and ice shelves are fairly well understood, this is not true for the transition between the two. In consequence, the existence and nature of any grounding line instability have
  • 1993
  • Dynamics of two subpolar valley glaciers. Erikbreen and Hannabreen, Northern Spitsbergen
  • Arctic Ocean;Arctic Region ; Geophysics ; Glacial valley ; Glacier ; Glacier dynamics ; Glacier mass balance ; Glaciology ; Meltwater ; Spitsbergen ; Svalbard
  • 1993
  • Arid area ; Arizona ; Biogeography ; Climatic variation ; Desert ; Holocene ; Human impact ; Population dynamics ; United States ; Vegetation
  • This paper examines relationships of population dynamics to climatic fluctuation and anthropogenic factors in two columnar cactus species in the northern Sonoran Desert. The results underscore the responsiveness of desrt plant populations
  • to temporal variability in environmental stresses as well as the influence of temporal scale on the views of population dynamics.
  • 1993
  • Ice-sheet dynamics and subglacial meltwater regime inferred from form and sedimentology of glaciofluvial systems: Victoria Island, District of Franklin, Northwest Territories
  • are used to infer the necessary ice-sheet dynamics associated with their formation.
  • 1993
  • Properties, dynamics and association of soils on high elevations of the Bavarian Forest (Germany) as illustrated by a toposequence on gneiss debris
  • hydraulic conductivity of both layers has important effects on the dynamics of water and nutrient elements, and thus on soil development.
  • 1993
  • An urban pattern dynamics with capital and knowledge accumulation
  • Capital accumulation ; Dynamic model ; Economic structure ; Spatial equilibrium ; Urban dynamics ; Urban economy ; Urban model ; Urban structure
  • 1993
  • Chaos ; Fractal geometry ; Geosystem ; Landscape dynamics ; Natural landscape ; Space time ; System dynamics
  • 1993
  • Earth surface processes ; Hungary ; Landform evolution ; Slope dynamics ; Soil erosion
  • The influences into the environmental system can be - according to their temporal aspect - cumulative, abrupt, periodical or episodic. The basic idea of the paper is the characterization of processes (environmental dynamics) through the evaluation
  • 1993
  • Canada ; Channel geometry ; Confluent ; Flood ; Fluvial dynamics ; Fluvial processes ; Grain size distribution ; Quebec ; Sediment transport
  • The field study reported here had two objectives: to describe the bed geometry at confluences of unequal depth channels and 2) to examine the relationships between bed morphology, surface sediments properties and flow dynamics as discharge varied
  • 1993
  • Day-to-day dynamics in transportation networks: stability and limits of equilibrium in a two-link network
  • Model ; Spatial equilibrium ; Structural stability ; System ; System dynamics ; Time series ; Transport ; Transport network
  • 1993
  • Unobserved heterogeneity in dynamic discrete choice models
  • Consumer behaviour ; Dynamic model ; Location ; Monte Carlo analysis ; Retail trade ; Shopping trip choice ; Simulation ; Spatial choice
  • 1993
  • Employment dynamics, spatial restructuring, and the business cycle
  • Centrality ; Dallas ; Economic structure ; Employment ; Land use ; Second order urban centre ; Spatial structure ; Texas ; United States ; Urban area ; Urban dynamics ; Urban economy
  • 1993
  • Dynamic models of macrosystems with self-reproduction and their application to the analysis of regional systems
  • Dynamic model ; Internal migration ; Migratory flow ; Region ; Regional system ; Structural stability ; System
  • 1993
  • About the dynamics of Baltic Sea water inflow into the Bodden waters around Rügen
  • 1993
  • Applied climatology ; Atmosphere ; Atmospheric circulation ; Atmospheric dynamics ; Climate ; Climatic variation ; Climatology ; Dynamical climatology ; Energy balance ; Meteorology ; System
  • 1993
  • France ; Landslide ; Mass movement ; Microstructure ; Slope ; Slope dynamics ; Soil ; Soil properties ; Solifluction
  • understanding of the dynamics of mass deposits.
  • 1993