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Résultats de la recherche (13 résultats)

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Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Radiation and energy budgets of alpine tundra environments of North America
  • Albedo ; Bioclimatology ; Ecosystem ; Energy balance ; Microclimate ; Mountain ; Radiation ; Spatial variation ; Topoclimate ; Tundra
  • Recent physical climatology research (radiation and energy budget) from North American alpine tundra environments is summarized and directions for further research suggested: analyses of the spatial variations of albedo, the role of sloping surfaces
  • 1994
  • Tree-tundra competitive hierarchies, soil fertility gradients, and treeline elevation in Glacier National Park, Montana
  • Biomass ; Ecosystem ; Ecotone ; Forest ; Geochemistry ; Montana ; Soil properties ; Tree line ; Tundra ; United States of America
  • . The tundra-line may be lower where more nutrients are available because tundra species may more readily alter their competitive ability than do the tree species in this area.
  • 1994
  • Late Quaternary history of tundra vegetation in northwestern Alaska
  • Alaska ; Climatic variation ; Palaeo-ecology ; Palynology ; Pollen diagram ; Quaternary ; Taxonomy ; Tundra ; Vegetation
  • Pollen analysis of a new core from Joe Lake indicates that the late Quaternary vegetation of northwestern Alaska was characterized by four tundra and two forest-tundra types. These vegetation types were differentiated by combining quantitative
  • 1994
  • Arctic Region ; Climatic variation ; Cold area ; Forest ; Glacial features ; Global change ; Greenhouse effect ; Human impact ; Ozone ; Pollution ; Stratosphere ; Tundra
  • topical environmental issues of public and scientific concern with the factual world. The A. studies the climatic trends and variability, snow, ice and periglacial activity, stratospheric ozone, plant cover-tundra and the boreal forest, pollution of air
  • 1994
  • The pattern of carbon-mineralisation in the high-arctic tundra (western and northern Spitsbergen) as an expression of lanscape ecologic environment heterogeneity
  • Arctic Region ; Biogeochemistry ; Biomass ; Carbon dioxide ; Cold area ; Ecosystem ; Primary production ; Soil ; Soil properties ; Spitsbergen ; Svalbard ; Tundra ; Vegetation
  • 1994
  • Humuszustand und typische Humusprofile bei Böden der oligotrophen Tundra NW-Spitsbergen
  • Arctic Region ; Humus ; Marine terrace ; Moraine ; Soil ; Soil properties ; Soil science ; Spitsbergen ; Svalbard ; Tundra ; Vegetation
  • 1994
  • Carbon cycle ; Ecosystem ; Ecotone ; Forest ; Model ; Montana ; Primary production ; Snow ; Soil moisture ; Tree line ; Tundra ; United States of America
  • 1994
  • Bioclimatology ; Biogeography ; Boundary ; Climatology ; Cold area ; Northern hemisphere ; Taiga ; Tundra ; World
  • 1994
  • Arkhangelsk ; Cold area ; European part of Russia ; Freeze-thaw cycle ; Moss ; Soil ; Soil moisture ; Soil temperature ; Temperature ; Thermal regime ; Tundra ; Vegetation
  • 1994
  • Arctic Region ; Biogeography ; Cold area ; Phytosociology ; Plant cover ; Spatial variation ; Spitsbergen ; Svalbard ; Taxonomy ; Tundra ; Vegetation ; Vegetation map
  • 1994
  • Alaska ; C 14 dating ; Climatic variation ; Cold area ; Forest ; Holocene ; Palaeo-environment ; Palynology ; Quaternary ; Tundra
  • 1994
  • Eurasia ; Forest ; North America ; Northern hemisphere ; Plain ; Runoff ; Subarctic zone ; Tundra ; Water balance ; World
  • 1994
  • Arctic Region ; Asian part of Russia ; Cold area ; Eastern Siberia ; Ecosystem ; Flora ; Krasnoyarsk ; Phytogeography ; Quantitative ecology ; Tundra ; Vegetation
  • 1994