9 record(s) found with the tag "atmospheric pollution" (multi-year projects are grouped):
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Recent changes in carbon source-sink relationships and greenhouse gas emissions in forest and peatland ecosystems along the Mackenzie Valley region of Canada
Principal Investigator: Bhatti, Jagtar
Licenced Year(s): 2011 2010 2009 2008 2007
Summary: The objectives of this research project are to: 1. map and assess changes in the distribution and composition of forest and peatland ecosystems due to climate changes; 2. estimate carbon storage (and variation) in boreal to arctic ecoregions of the Mackenzie valley; and 3. assess interannual and seasonal variations and key processes controlling carbon dioxide (CO2) and methane (CH4) dynamics. ...


Pan-Arctic Climate, Weather and Sea Ice Measurements
Principal Investigator: Herber, Andreas
Licenced Year(s): 2011 2009
Summary: The main aim of these weather and air quality studies is to improve the understanding of the processes in the Arctic atmosphere and to use these measurements to improve the performance of regional and global climate models of the Arctic. The aim of the sea ice studies is to obtain a snapshot of ice thickness in a vast region of the Arctic, and to create an inventory of Arctic sea ice volume. ...


Atmospheric contaminant inputs to and impacts on Lac Belot
Principal Investigator: Lockhart, W.L.
Licenced Year(s): 1993 1992
Summary: As part of this ongoing study, sediment samples will be taken fron the deepest locations of Lac Belot and Colville Lake. These samples will be analyzed for the presence of contaminants and dated. These analyses will allow the researcher to construct histories of the input of contaminants to these lakes. In addition, lake trout, whitefish and burbot will be collected to determine what contaminan...


Processes and Fluxes of Contaminants in Aquatic Systems
Principal Investigator: Gregor, Dennis J.
Licenced Year(s): 1993
Summary: Atmospheric contaminants that accumulate in the snow are released during a very short time in the spring when the snow melts and washes out through rivers and lakes into the Arctic Ocean. Contaminants can be bound to substrates, consumed by organisms or transformed so that not all contaminants deposited in the snow reach the Arctic Ocean. In this on-going study, contaminant levels and distributi...


Preliminary Investigation of Basic Chemical Conditions of Water and Fish from Kasegalik Lake
Principal Investigator: Hermanson, Mark
Licenced Year(s): 1994 1993 1992 1990
Summary: The researcher and his team will attempt to identify whether or not Kasegalik Lake has fresh water atop relict sea water. The presence of salt water may influence the depositional behaviour of pollutants delivered by the atmosphere. They will analyze some Kasegalik sediments and fish from the lake to make an initial determination of whether or not further studies are warranted....


Toxaphene in the Arctic: Atmospheric Delivery and Transformation in the Food Chain
Principal Investigator: Bidleman, Terry F.
Licenced Year(s): 1992
Summary: The researcher will collect air and water samples for analysis of toxaphene and other organochlorine compounds, as well as examining differences in toxaphene patterns in air, water and biological samples....


Study of Contaminants and Bio-indicators of Environmental Change in Arctic Lakes
Principal Investigator: Smol, John
Licenced Year(s): 1994 1993 1992
Summary: The Researchers will sample lakewater and lake sediments from several study sites near Resolute and in the High Arctic near Alert. At each lake they will analyze the water chemistry and collect lake muds. The lake muds contain a historical record of past pollution (black carbon particles) as well as biological indicators (for example, diatom algae) of environmental change....


Limnology of Lake Hazen: Fish, Atmospheric Pollution and Climate History
Principal Investigator: Brunskill, Gregg
Licenced Year(s): 1991 1990
Summary: Sediment samples from Hazen Lake will help scientist understand the global movement of airborn pollutants. In addition, various species of the Lake Hazen biomass will be collected and analyzed to determine if atmoshperic pollutants are present....


Deposition and Fate of Trace Organic Contaminants in Arctic Aquatic Systems
Principal Investigator: Gregor, Dennis J.
Licenced Year(s): 1992 1990
Summary: Snow samples will be collected from very remote sites throughout the mainland of NWT during visits to stations maintained by Water Resources Branch. Samples will also be collected at several high Arctic weather stations. Intensive sampling will also be conducted on Agassiz Ice Cap near Resolute. Samples will be analyzed for pesticides, PCBs and other compounds....


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