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permafrostphysical sciences
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9 dossier(s) trouvé(s) portant l’étiquette "forest fire" (les projets pluriannuels sont regroupés):
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Carbon sequestration in boreal forests during regeneration process after forest fire disturbances.
chercheur principal: Matsuura, Yojiro
Année(s) de permis: 2022
Résumé: This licence has been issued for the scientific research application No.5340. Main objective of the project is to re-start and maintain study sites after two growing season without any census and sample collections. The research team will also establish additional study sites for regeneration process and soil condition monitoring (detection of permafrost table depth). The team will try again to...
Année(s) de permis: 2022
Résumé: This licence has been issued for the scientific research application No.5340. Main objective of the project is to re-start and maintain study sites after two growing season without any census and sample collections. The research team will also establish additional study sites for regeneration process and soil condition monitoring (detection of permafrost table depth). The team will try again to...
Permafrost carbon fluxes
chercheur principal: Pumpanen, Jukka S
Année(s) de permis: 2019
Résumé: The field work in Trail Valley Creek and Inuvik aims to study: 1) how catchment characteristics, such as vegetation and soil properties, control the amount and quality of aquatic dissolved organic matter (DOM) and its microbial degradability, and 2) how these factors further regulate greenhouse gas fluxes (carbon dioxide CO2, methane CH4, nitrous oxide N2O) from Arctic lakes. At the Dempster hi...
Année(s) de permis: 2019
Résumé: The field work in Trail Valley Creek and Inuvik aims to study: 1) how catchment characteristics, such as vegetation and soil properties, control the amount and quality of aquatic dissolved organic matter (DOM) and its microbial degradability, and 2) how these factors further regulate greenhouse gas fluxes (carbon dioxide CO2, methane CH4, nitrous oxide N2O) from Arctic lakes. At the Dempster hi...
Short and long term effects of forest fires on the stability of carbon pools in the arctic permafrost and subarctic forests (ARCTICFIRE)
chercheur principal: Koster, Kajar
Année(s) de permis: 2018 2015
Résumé: The aim of this project is to study the short term and long term effects of different fire intensities on the decomposition of soil organic matter (SOM) in northern boreal forests under changing fire regimes. The objectives are to: 1) explore the short and long term effects of forest fires with different intensity on above- and belowground biomasses; 2) explore changes in albedo, snow depths an...
Année(s) de permis: 2018 2015
Résumé: The aim of this project is to study the short term and long term effects of different fire intensities on the decomposition of soil organic matter (SOM) in northern boreal forests under changing fire regimes. The objectives are to: 1) explore the short and long term effects of forest fires with different intensity on above- and belowground biomasses; 2) explore changes in albedo, snow depths an...
The effects of fire on diverse aquatic ecosystems of the NWT
chercheur principal: Tank, Suzanne E
Année(s) de permis: 2017 2016
Résumé: The objective of this study is to determine the effect of fire on water quality within the southern Northwest Territories landscape. The research team will work across the Taiga Plains and Taiga Shield Ecoregions, because it is believed that differences in landscape between these regions will affect the catchment response to fire. The research team will also target catchments with variable permaf...
Année(s) de permis: 2017 2016
Résumé: The objective of this study is to determine the effect of fire on water quality within the southern Northwest Territories landscape. The research team will work across the Taiga Plains and Taiga Shield Ecoregions, because it is believed that differences in landscape between these regions will affect the catchment response to fire. The research team will also target catchments with variable permaf...
Development of a Differential Frost Heave Model: Application to Patterned Ground Formation.
chercheur principal: Peterson, Rorik
Année(s) de permis: 1998
Résumé: The objective of this work is to make physical measurements of the size, shape and distribution of earth hummocks in areas where the 1968 forest fire did not occur. We are developing a mathematical model which predicts hummock size and activity based on soil properties and environmental conditions. Because hummock activity appears to be very sensitive to environmental changes, our model, coupled ...
Année(s) de permis: 1998
Résumé: The objective of this work is to make physical measurements of the size, shape and distribution of earth hummocks in areas where the 1968 forest fire did not occur. We are developing a mathematical model which predicts hummock size and activity based on soil properties and environmental conditions. Because hummock activity appears to be very sensitive to environmental changes, our model, coupled ...
Studies of the Environmental Effects of Disturbances in the Subarctic (SEEDS)
chercheur principal: Kershaw, G. Peter
Année(s) de permis: 2000 1999 1998 1997 1996 1995 1994 1993 1992 1990
Résumé: Access to the site will be along existing seismic lines from Tulita. Transport will involve helicopter, boat, ATV and foot. The research is planned to see what happens after the fire to the permafrost, soils, plants and animals. An unburned site will be monitored to provide comparison with the burned area. Many studies will be done, including measurements of air and soil temperatures, wind spe...
Année(s) de permis: 2000 1999 1998 1997 1996 1995 1994 1993 1992 1990
Résumé: Access to the site will be along existing seismic lines from Tulita. Transport will involve helicopter, boat, ATV and foot. The research is planned to see what happens after the fire to the permafrost, soils, plants and animals. An unburned site will be monitored to provide comparison with the burned area. Many studies will be done, including measurements of air and soil temperatures, wind spe...
Forest & Forest Fire Studies in the Mackenzie Delta Ecosystem
chercheur principal: Wein, Ross
Année(s) de permis: 1994
Résumé: Since fire is most wide spread agent of change in the northern forest, society should know how climatic warming will influence the force. The fire history of the Mackenzie Delta Region is known only through fire suppresion records over the past 25 years. Spot checks on the landscape have been made, but no longer record of 5-20 decades is available. Tree ring approaches will be used in this study...
Année(s) de permis: 1994
Résumé: Since fire is most wide spread agent of change in the northern forest, society should know how climatic warming will influence the force. The fire history of the Mackenzie Delta Region is known only through fire suppresion records over the past 25 years. Spot checks on the landscape have been made, but no longer record of 5-20 decades is available. Tree ring approaches will be used in this study...
Fire, carbon budget and climate change
chercheur principal: Wein, Ross
Année(s) de permis: 1993
Résumé: The research team will be examining areas of permafrost south of Inuvik and near Hay River in order to assess the rate of loss of permafrost as a result of the warming in climate over the past twenty years. The loss in permafrost may be speeded up following a local fire. The wetlands that replace these areas of permafrost could lead to a greater production of methane (one of the gases that contr...
Année(s) de permis: 1993
Résumé: The research team will be examining areas of permafrost south of Inuvik and near Hay River in order to assess the rate of loss of permafrost as a result of the warming in climate over the past twenty years. The loss in permafrost may be speeded up following a local fire. The wetlands that replace these areas of permafrost could lead to a greater production of methane (one of the gases that contr...
Implications of climate change for slope stability in the Mackenzie Valley
chercheur principal: Dyke, Larry
Année(s) de permis: 1993
Résumé: In this ongoing study, the frequency and characteristics of landslides occurring in the Mackenzie Valley area are examined. I am trying to determine the roles that forest fires, climate changes and water flow in rivers play in the location and number of landslides. The field work will involve taking measurements on past landslides that include measuring permafrost features and taking core samples...
Année(s) de permis: 1993
Résumé: In this ongoing study, the frequency and characteristics of landslides occurring in the Mackenzie Valley area are examined. I am trying to determine the roles that forest fires, climate changes and water flow in rivers play in the location and number of landslides. The field work will involve taking measurements on past landslides that include measuring permafrost features and taking core samples...
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