117 record(s) found with the tag "physical sciences" (multi-year projects are grouped):
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Impacts of climate change on wildfire risk in boreal forests in the Northwest Territories
Principal Investigator: Asselin, Hugo
Licenced Year(s): 2018
Summary: The three main objectives of this research are: 1) to reconstruct the multi-century history of wildfire and vegetation in the Northwest Territories by analyzing charcoal contained in lake sediments; 2) to establish the links between recent fire activity and climatic data by studying tree growth rings (annual resolution); and, 3) to combine this scientific knowledge to indigenous knowledge obtained...


Impact of ferry landings on water quality and traditional fish harvesting in the Mackenzie and Peel Rivers
Principal Investigator: Gray, Derek K
Licenced Year(s): 2018
Summary: Fishing is an important part of the Gwich’in way of life. Concerns in the Gwich’in communities of Fort McPherson and Tsiigehtchic have arisen with regards to the use of granular material in ferry landings. Anthropogenic sediment from ferry landings has the potential to alter river ecology downstream thus impacting valuable fish habitat. The objectives of this research project are to determine ...


Long-term aquatic ecosystem change at the southern limit of permafrost
Principal Investigator: Korosi, Jennifer B
Licenced Year(s): 2018
Summary: The goal is to reconstruct long-term environmental change (hundreds to thousands of years) by examining chemical and biological fossil remains preserved in lake sediment cores, in order to better understand how thawing permafrost impacts lake ecosystems. 1) Water chemistry and plankton survey The research team will collect lake water samples from the study lakes to analyze for water chemistry...


Examining the impacts of climate and environmental change on aquatic and terrestrial ecosystems of the Mackenzie region, NWT
Principal Investigator: Pisaric, Michael FJ
Licenced Year(s): 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009
Summary: This research will continue the long term objective of documenting and understanding the impacts of recent climate change on northern terrestrial and aquatic ecosystems. The short term objectives of my research for 2018 are: 1) to investigate the impacts of permafrost degradation and subsequent thaw slumping on freshwater ecosystems; 2) to examine the limnological implications of drained lakes on ...


Productivity and mercury trends in Great Bear Lake
Principal Investigator: Evans, Marlene S.
Licenced Year(s): 2018
Summary: The objectives of this research project are to collect sediment cores from up to six sites in Great Bear Lake to investigate the temporal record of diatom and lake productivity and the deposition of mercury and other metals; to investigate spatial gradients in lake productivity as influenced by station depth, distance from shore, and river influences; and to continue to investigate mercury levels ...


Prospecting for Earth’s oldest rocks using geochemical signatures of Pleistocene glacial sediments
Principal Investigator: Bilak, Grayson S
Licenced Year(s): 2017
Summary: For this research the Principal Investigator (PI) propses an innovative combination of quaternary geology, isotope geochemistry, and Precambrian geochronology that will identity previously unmapped outcrops of ancient continental crust in the Acasta Gneiss Complex (AGC). An age range and bedrock composition will be generated for the research area and used to help further the understanding of the p...


Erosion of old organic carbon in the Mackenzie River Basin
Principal Investigator: Hilton, Robert G
Licenced Year(s): 2017 2013 2011 2010 2009
Summary: The objective of this research is to better quantify the carbon source, age and fate in one of the largest rivers draining the high latitudes. The research team will sample river sediments and waters to establish temporal variability in OC source and age. The team will target high and falling flow (in June) when most sediment and water are exported. The research team will directly measure velo...


Using the past to inform the future: A paleoecological perspective of the impacts of drought and fire on lakes, permafrost and forests
Principal Investigator: Pisaric, Michael FJ
Licenced Year(s): 2018 2017 2016
Summary: The objectives of this research are to examine the frequency and severity of past wildfire and drought (drought-like) conditions in the southern Northwest Territories. Specifically, the research team will examine the following questions: 1) how frequent and severe have fires been in the past; 2) are fires becoming more frequent/severe due to the impacts of climate change; 3) what impact does wildf...


Palaeontology of the Summit Creek Formation, western Northwest Territories, Canada
Principal Investigator: Vavrek, Matthew J
Licenced Year(s): 2012
Summary: The research team will be prospecting for and collecting Cretaceous fossils from the Summit Creek Formation in order to better understand what terrestrial biodiversity was like at high latitudes at that time. This project is a continuation of the collaborative research program on ancient biodiversity in the Canadian Arctic. Recently, the research team completed work supported by Polar Continental ...


EL462 and EL463 Aggregate and Permafrost Mapping - Geophysical Survey and Confirmatory Drilling
Principal Investigator: Hansen, Ken
Licenced Year(s): 2013 2012
Summary: The objectives of this research project are to provide a better understanding of the permafrost under a proposed road right-of-way (ROW) and to delineate potential aggregate deposits. This will include mapping: permafrost distribution, massive ice bodies (including wedge ice), depth to massive ice, lower contacts of massive ice, zones of thermokarst, ice rich sediments (thaw sensitive), active la...


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