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physical sciencesclimate change
forestry
paleontology
fossils
ancient forests
vegetation
tree core sampling
climatology
biology
tree growth
dendrochronology
petroleum industry
permafrost
historical data
topography
tree ring
sediment
climatic history
treeline
9 dossier(s) trouvé(s) portant l’étiquette "trees" (les projets pluriannuels sont regroupés):
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Forest Research in the Mackenzie River Delta
chercheur principal: Johnson, Art
Année(s) de permis: 2005
Résumé: Researchers are currently working on a project at Banks Island where they will measure stumps and logs of 3-million-year-old trees and attempt to understand the species that grew there, how tall the trees were, their diameters and the annual production of wood and foliage. Researchers know the Banks Island trees were spruce, larch and pine. To accurately determine what the ancient trees looked l...
Année(s) de permis: 2005
Résumé: Researchers are currently working on a project at Banks Island where they will measure stumps and logs of 3-million-year-old trees and attempt to understand the species that grew there, how tall the trees were, their diameters and the annual production of wood and foliage. Researchers know the Banks Island trees were spruce, larch and pine. To accurately determine what the ancient trees looked l...
Past climates of ancient forests on Banks Island
chercheur principal: Williams, Christopher J
Année(s) de permis: 2005 2003
Résumé: The objective of this project is to make detailed measurements of fossil plants that grew at high latitudes between 12 and 2 million years ago. The researchers will use these and previously obtained data to test the hypothesis that until about 28 million years ago arctic wetland forests were high biomass forests dominated by deciduous conifers, but by 12 million years aga, these were replaced by ...
Année(s) de permis: 2005 2003
Résumé: The objective of this project is to make detailed measurements of fossil plants that grew at high latitudes between 12 and 2 million years ago. The researchers will use these and previously obtained data to test the hypothesis that until about 28 million years ago arctic wetland forests were high biomass forests dominated by deciduous conifers, but by 12 million years aga, these were replaced by ...
Long-term Ecological and Geomorphological Investigations in the Alpine Tundra of the Mackenzie Mountains, NWT
chercheur principal: Kershaw, G. Peter
Année(s) de permis: 2018 2017 2016 2015 2014 2012 2010 2009 2008 2007 2006 2005 2004 2003
Résumé: The main study objectives are to: 1) determine the status of permafrost landforms in the study area between Macmillan Pass and Plains of Abraham; and 2) determine the long-term recovery after abandonment of the CANOL No. 1 project. This is part of long-...
Année(s) de permis: 2018 2017 2016 2015 2014 2012 2010 2009 2008 2007 2006 2005 2004 2003
Résumé: The main study objectives are to: 1) determine the status of permafrost landforms in the study area between Macmillan Pass and Plains of Abraham; and 2) determine the long-term recovery after abandonment of the CANOL No. 1 project. This is part of long-...
Postglacial Treeline Change in the Mackenzie-Selwyn Mountains
chercheur principal: MacDonald, Glen M
Année(s) de permis: 1992 1990
Résumé: The research party will continue to study past climatic variation and will continue to examine the relationship between climatic change and vegetation response. They will continue lake sediment coring and will collect tree increment cores....
Année(s) de permis: 1992 1990
Résumé: The research party will continue to study past climatic variation and will continue to examine the relationship between climatic change and vegetation response. They will continue lake sediment coring and will collect tree increment cores....
Determination of Fossil Plant DNA Sequences and Comparison with Contemporary Homologous Sequences
chercheur principal: LePage, Ben A.
Année(s) de permis: 1992 1991
Résumé: The Researcher and his team will continue to sample fossil leaves of conifers and deciduous tree species preserved in the permafrost on Axel Heiberg Island. They will compare genes isolated from fossil trees to evaluate rates of evolution....
Année(s) de permis: 1992 1991
Résumé: The Researcher and his team will continue to sample fossil leaves of conifers and deciduous tree species preserved in the permafrost on Axel Heiberg Island. They will compare genes isolated from fossil trees to evaluate rates of evolution....
Climatic Change at the Forest/Tundra Boundary
chercheur principal: Landhaeusser, Simon M.
Année(s) de permis: 1992 1991 1990
Résumé: The Researcher and his team will seed and plant plots prepared in 1990. They will determine the germination rate, establishment and the annual growth of the seedlings. The measurements will be related to the energy input which influences these microsites....
Année(s) de permis: 1992 1991 1990
Résumé: The Researcher and his team will seed and plant plots prepared in 1990. They will determine the germination rate, establishment and the annual growth of the seedlings. The measurements will be related to the energy input which influences these microsites....
Dendrochronology of Arctic Driftwood
chercheur principal: Eggertsson, Olafur
Année(s) de permis: 1990
Résumé: The Researcher will sample about 100-200 driftwood logs using a chain-saw to cut off a 1-2 cm plate about 0.5 m inside the end of each log. The material will be shipped to Lund University laboratory for examination....
Année(s) de permis: 1990
Résumé: The Researcher will sample about 100-200 driftwood logs using a chain-saw to cut off a 1-2 cm plate about 0.5 m inside the end of each log. The material will be shipped to Lund University laboratory for examination....
Extensive Dendrochronological Reconstruction of Temperature in the Northern Hemisphere: North American Boreal Zone
chercheur principal: Jacoby, Gordon C.
Année(s) de permis: 1994 1989
Résumé: The object of this research is to reconstruct past climate in order to understand how the climate system works, and what past natural variations may be expected based upon this information. This project is to sample old-aged trees and to assemble enough coverage to reconstruct regional and Hemispheric temperatures for the most recent centuries....
Année(s) de permis: 1994 1989
Résumé: The object of this research is to reconstruct past climate in order to understand how the climate system works, and what past natural variations may be expected based upon this information. This project is to sample old-aged trees and to assemble enough coverage to reconstruct regional and Hemispheric temperatures for the most recent centuries....
Biomass estimates for the North American boreal forest
chercheur principal: Simpson, Lloyd G.
Année(s) de permis: 1988 1987
Résumé: Dr. Simpson and his crew will be travelling along the NWT highway system measuring trees and shrubs in the forest. This information will be used to estimate the amount of living material in the boreal forest....
Année(s) de permis: 1988 1987
Résumé: Dr. Simpson and his crew will be travelling along the NWT highway system measuring trees and shrubs in the forest. This information will be used to estimate the amount of living material in the boreal forest....
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