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Lakes as sentinels of environmental change in discontinuous permafrost peatlands
Principal Investigator: Korosi, Jennifer B
Licensed Year(s): 2024 2023
Summary: This licence has been issued for the scientific research application No.5468. The goal of this project is to understand and predict how lakes in discontinuous permafrost peatlands are changing in response to climate warming and loss of permafrost. The field activities for 2023 will focus on three regions/objectives: Inferring long-term environmental change in the Five Fish Lakes (Lue Túé ...


Murky waters: Impacts of disturbances on the mobilization and downstream delivery of mercury and methylmercury
Principal Investigator: Olefeldt, David
Licensed Year(s): 2023 2022 2021
Summary: This licence has been issued for the scientific research application No.5448. This project proposes to monitor wetlands, streams, rivers, and lakes in the Dehcho region, with a focus on understanding current and future trends in aquatic mercury and methylmercury. The region has vast stores of mercury accumulated in organic wetland soils, and there is a risk that disturbances such as permafrost ...


Influence of changing active-layer thickness on permafrost peatland trace gas exchanges and carbon balance
Principal Investigator: Sonnentag, Oliver
Licensed Year(s): 2022 2021 2019 2017 2016 2015 2014 2013 2013
Summary: The project of the present application is the continuation of year-round eddy covariance measurements of carbon, water and energy fluxes at Scotty Creek, established in 2013. The key methodology is tower-mounted micrometeorological measurements around the eddy covariance technique using an open-path infra-red gas analyzer and a sonic anemometer. These measurements are supported by measurements ...


Impacts of 10 years of climate warming on forests and peatlands in the Dehcho
Principal Investigator: Errington, Ruth
Licensed Year(s): 2018
Summary: After 10 years of warming climate conditions, the Canadian Fire Service is leading a field project to re-measure a series of permanent monitoring plots to identify any changes to the forest stand structure, tree growth rates, plant community composition, tree, shrub, herb, and lichen biomass. These changes will be associated with climate trends and environmental factors such as soil type, presence...


Organic Carbon Dynamics and Accumulation in Discontinuously Frozen Peatlands
Principal Investigator: Robinson, Stephen
Licensed Year(s): 1996 1995
Summary: Research will be conducted in a fen-bog complex approximately 5 km west of Fort Simpson. Gas samples will be obtained using portable chambers and later analyzed using gas chromotography. Cores will be collected using a peat corer and a modified ice auger. Peat temperatures, water levels, plant growth rates and water chemistry will also be measured. Geophysical mapping using ground penetrating ...


Peat Plateau Collapse and Climate Change
Principal Investigator: Wein, Ross
Licensed Year(s): 1992
Summary: The research will examine permafrost-containing peat plateaus that have burned during severe fires to determine the features of subsidence (decrease) and the rate of subsidence....


The Influence of Thermokarst Subsidence on Peatland and the Role of Climatic Change within the Discontinuous Permafrost Zone in the Southern Mackenzie Valley
Principal Investigator: Spivey, Diane
Licensed Year(s): 1988
Summary: Diane Spivey is interested in knowing why there is less permafrost now in peatbogs. First, she will be mapping areas that have thawed and collapsed. Then, she will be looking and sampling vegetation to see if the vegetation has been disturbed so that it no longer insulates the permafrost as well. Last, she will look to see how well peat retains heat and acts as an insulator. She will use this i...


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