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
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.
The physical climatology of alpine tundra, Scout mountain, British Columbia, Canada
Albedo ; British Columbia ; Canada ; Climatology ; Evapotranspiration ; High mountain ; Orographic effect ; Radiation balance ; Snow ; Snow cover ; Synoptic climatology ; Tundra
Two field seasons at an alpine tundra site in southern British Columbia indicate synoptic-scale weather provided more controls on surface radiation transfers than did local controls. Other results were the negligible energy storage in the snowpack
, use of available energy by the snowmelt process, and rapid dessication of tundra. - (DWG)
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
Biodiversity ; Biogeography ; Climatic change ; Colorado ; Comparative study ; Ecological niche ; Montana ; Mountain ; National park ; Tundra ; United States of America ; Vegetation
Biodiversidad ; Biogeografía ; Cambio climático ; Colorado ; Estados Unidos ; Estudio comparativo ; Montaña ; Nicho ecológico ; Parque nacional ; Tundra ; Vegetación
The AA. test the relevance of niche and neutral theories of biogeography to alpine tundra change and assess the continuum and classification approaches to biogeographic description as tools to describe similarity. Two extensive studies of alpine
tundra, from the Indian Peaks area, Colorado and Glacier National Park, Montana, are combined. Using the Mantel test, the correlation between difference and distance is discussed. In monitoring programs such as GLORIA, the assesment of observed changes
in alpine tundra over the coming decades will require more advanced analyses.
Surface energy budgets over alpine tundra in summer, Niwot Ridge, Colorado Front Range
Climatology ; Colorado ; Energy balance ; Evapotranspiration ; Meadow;Grassland ; Mountain ; Precipitation ; Radiation ; Soil moisture ; Summer ; Temperature ; Tundra ; United States
High variation in heat energy balance values was found to occur on five different kinds of tundra surfaces largely as a result of yearly changes in precipitation.―(DWG)
This paper examines the hydrological connectivity and the storage status of a cluster of tundra ponds in a High Arctic polar oasis, relating seasonal hydrological changes to lateral drainage, pond water balance and active layer thaw conditions.
Modern tundra landscapes of the Kolyma Lowland and their evolution in the Holocene
Asian part of Russia ; Climatic change ; Eastern Siberia ; Geomorphogenesis ; Holocene ; Lake ; Landscape ; Magadan ; Periglacial features ; Permafrost ; Thermokarst ; Tundra
The different tundra landscapes of the Kolyma Lowland, northern Siberia are described, focusing on landscape typology, digital mapping and the calculation of areas occupied by different landscape complexes. The genesis, age and evolution of yedoma
Microbial controls on methane fluxes from a polygonal tundra of the Lena Delta, Siberia
Asian part of Russia ; Delta ; Geochemistry ; Humid environment ; Micro-organism ; Periglacial features ; Permafrost ; Siberia ; Soil wedge polygon ; Tundra
The aim of this study was to verify the role of the microbial processes for the seasonal fluctuation of methane fluxes from tundra environments. The analysis included measurements of seasonal methane fluxes and environmental parameters as well
as the quantification of methane production and oxidation under in situ conditions within the active layer of permafrost soils, in a typical polygonal tundra in the Lena Delta, Siberia.
Pedogenic carbonate cutans as a record of the Holocene history of relic tundra-steppes of the Upper Kolyma Valley (North-Eastern Asia)
Asian part of Russia ; C 14 dating ; Carbonate ; Cold area ; Ecosystem ; Holocene ; Microstructure ; Palaeo-environment ; Soil ; Soil properties ; Steppe ; Tundra
insufficient to provide the desired reliability for paleo-landscape reconstructions. Nevertheless, the combination of absolute dating, cutan morphology and composition has shed light on the Holocene evolution of tundra-steppes in North-Eastern Asia.
Arctic Region ; Carbon ; Ecosystem ; European part of Russia ; Geographical information system ; Organic materials ; Plant cover ; Soil ; Soil classification ; Taiga ; Tundra
and 2 separate upscaling tools. Results are compared with previous estimates for taiga and tundra ecosystems. This research is part of the TUNDRA (TUNdra Degradation in the Russian Arctic) project that examines the role of Arctic feedback processes
Soil moisture and temperature variation under different types of tundra vegetation during the growing season : A case study from the Fuglebekken catchment, SW Spitsbergen
Active layer ; Arctic Region ; Climatic change ; Cold area ; Cryosol ; Permafrost ; Soil moisture ; Soil properties ; Soil temperature ; Spitsbergen ; Svalbard ; Tundra ; Watershed
Cambio climático ; Cuenca hidrográfica ; Humedad del suelo ; Molisol ; Pergelisol ; Propiedades del suelo ; Spitzberg ; Temperatura del suelo ; Tundra ; Zona fría ; Ártica
carried out between June 24 and September 9 of 2008. The studied sites represented : 1) Turbic Cryosol, poorly covered by vegetation and exhibiting evidences of strong cryogenic processes; 2) Hyperskeletic Cryosol covered by a community of wet moss tundra
vegetation with variable moisture which evolves under the influence of water flowing from the adjacent mountain slopes occupied by Little Auk colonies; and 3) Haplic Cryosol covered by lichen–herb–heath tundra vegetation, located on a raised marine terrace
. It is shown that : 1) Temperature of Arctic soils is connected with influence of cold thawing water; 2) Cryosols covered by wet moss tundra vegetation are the wettest and coldest; and 3) Cryosols covered by lichen-herb-heath tundra vegetation are the driest