12 record(s) found with the tag "biogeochemistry" (multi-year projects are grouped):
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Permafrost carbon fluxes
Principal Investigator: Pumpanen, Jukka S
Licensed Year(s): 2019
Summary: 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...


Capitalizing on long-term experimental manipulations to understand and predict arctic terrestrial ecosystem responses to climate warming
Principal Investigator: Grogan, Paul
Licensed Year(s): 2019
Summary: The objectives of this research project are: 1) to determine the biogeochemical and ecological significance of our discovery that mesic tundra plant growth can be co-limited by nitrogen (N) and phosphorus (P); 2) to predict the likely impacts of not just climate change, but also declining caribou and other mammalian herbivory, on tundra deciduous and evergreen shrub abundances; and, 3) to evaluate...


Biogeochemical controls on the structure and functioning of low arctic ecosystems
Principal Investigator: Grogan, Paul
Licensed Year(s): 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008
Summary: The Arctic is undoubtedly experiencing several major perturbations including climate change, and resource development and extraction (e.g. mining and pipeline construction) that are very likely to substantially affect the structure and functioning of its ecosystems. As a terrestrial ecosystem ecologist, the long-term goal of this research over the next 15-20 years is to substantially advance the u...


ARCTICFIRE
Principal Investigator: Pumpanen, Jukka S
Licensed Year(s): 2018 2015
Summary: The aim of the ARCTICFIRE project is to study the long term effects of natural forest fires on the decomposition of soil organic matter in the northern arctic and subarctic forests. The research team will study the changes in size and quality of soil carbon and nitrogen pools and fluxes after forest fires and their underlying processes in the arctic and subarctic zone, especially the interactions ...


Waste rock studies at a diamond mine site
Principal Investigator: Blowes, David W.
Licensed Year(s): 2014 2013 2012 2011 2010 2009 2008 2005
Summary: This research study is designed to investigate the processes related to water quality and quantity (collected at different scales) draining from country rock stockpiles that are located in areas of continuous permafrost. The quality of water draining from a country rock stockpile is determined by the combined effects of oxygen transport in the air phase, biogeochemical processes that control miner...


ArcticNet: an Integrated Regional Impact Study of the Coastal Western Canadian Arctic.
Principal Investigator: Fortier, Martin
Licensed Year(s): 2013 2012 2011 2010 2009 2007 2006 2005 2004
Summary: The central aim of the ArcticNet marine-based research program is to study on a long-term basis how climate induced changes are impacting the marine ecosystem, contaminant transport, biogeochemical fluxes, and exchange processes across the ocean-sea ice-atmosphere interface in the Canadian Arctic Ocean. Ultimately, the knowledge generated from this multi-year program will be integrated into regio...


Biogeochemistry of Lakes in the Mackenzie Delta
Principal Investigator: Lesack, Lance
Licensed Year(s): 2017 2016 2015 2014 2010 2009 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993
Summary: The goals of this research are to examine: 1) measurements of water depths and lake depths for selected area of the Mackenzie Delta; 2) changes in lake flooding and historical lake boundaries in the Mackenzie Delta. Specific activities for this field season include the following: (1) Improved information on the detailed topography of the Mackenzie Delta floodplain and how delta water levels a...


Links between permafrost stability and terrestrial organic carbon export from the Mackenzie River
Principal Investigator: Eglinton, Timothy I
Licensed Year(s): 2011 2009 2007
Summary: Although the widespread permafrost soils in the Arctic rim have the ability to retain terrestrial organic carbon for many millennia, evidence indicates that the recent global warming trend may potentially lead to rapid permafrost destabilization and abrupt release of carbon stored in this vast reservoir. To assess whether this process is underway, and to evaluate its impact on biogeochemical proce...


Assessment of Aqueous Methogenic Precursor Compounds in Periglacial Groundwaters
Principal Investigator: Marschner, Mark
Licensed Year(s): 2003
Summary: This study aims to better understand the formation of "calcrete" deposits, using field samples from the Campbell Uplift. Field sampling will be carried out daily using ground transportation to and from a base in Inuvik. Initial activities will include...


Environmental Study of Abandoned DEW Line Sites.
Principal Investigator: Reimer, K.J.
Licensed Year(s): 1994 1993
Summary: The researchers will collect soil/sediment, water, plant and other biological samples to investigate small-scale variations of introduced substances; to examine larger variations in tundra and marine ecosystems; and to aid decision-makers in identifying when and where remedial measures can be most effectively applied. This investigation will be conducted on abandoned DEW Line sites to evaluate th...


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