48 record(s) found with the tag "active layer" (multi-year projects are grouped):
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Measuring Carbon Fluxes at Illisarvik with Eddy Covariance
Principal Investigator: Skeeter, Wesley R
Licenced Year(s): 2016
Summary: The study will measure carbon dioxide (CO2) and methane (CH4) fluxes at Illisarvik during the peak of the growing season using a combination of eddy covariance and gas chamber methods. The primary objective will be to determine the magnitude of CO2 and CH4 fluxes and determine whether sequestration offsets emission. Secondary objectives will be to observe the temporal and spatial variability of th...


Permafrost, river, and groundwater inputs of trace elements and nutrients to the Mackenzie River estuary
Principal Investigator: Charette, Matthew
Licenced Year(s): 2016
Summary: The objectives are to measure a suite of trace elements and isotopes (TEIs) in the active layer and permanently frozen layer of permafrost cores sampled near the Mackenzie River, and to compare these concentrations to those observed in submarine groundwater discharge and Mackenzie River discharge in order to determine whether permafrost-associated TEIs are being transported to the coastal Arctic. ...


Thermal State of Permafrost
Principal Investigator: Siegfried, Dian
Licenced Year(s): 2016
Summary: The objective of this project is to continue an ongoing long-term monitoring of permafrost temperatures on Banks Island and Mould Bay. At these sites the research team have lost remote (satellite) communication and need to make repairs to continue receiving data. The research team are currently monitoring active layer and permafrost temperatures, active layer soil moisture, air temperature, and...


Influence of changing active-layer thickness on permafrost peatland trace gas exchanges and carbon balance
Principal Investigator: Sonnentag, Oliver
Licenced Year(s): 2016 2015 2014 2013
Summary: This project will address the following questions: 1) What is the net effect of permafrost thawing-induced biophysical and biogeochemical feedbacks to the climate system? 2) How do these two types of feedback differ between the discontinuous and continuous permafrost zones? 3) Is the reported decrease (increase) in net CO2 (CH4) exchange based on plot- (<1m2) and ecosystem-scale (~1km2) flux m...


Permafrost monitoring and collection of baseline terrain information in the Mackenzie Valley Corridor, NWT
Principal Investigator: Smith, Sharon S
Licenced Year(s): 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006
Summary: This project continues the on-going monitoring program of permafrost and collection of baseline terrain information in the Mackenzie Valley Corridor, NWT. This phase of the project is largely data collection. The objectives are: 1) To provide baseline knowledge of permafrost and terrain conditions (specifically ground temperature and permafrost active layer thickness) and improve characteriza...


Exchange of carbon gas fluxes over low arctic tundra
Principal Investigator: Lafleur, Peter M
Licenced Year(s): 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2007 2005 2004
Summary: The research team intends to study how important greenhouse gases, carbon dioxide and methane, are exchanged between tundra surfaces and the atmosphere. They will measure these exchanges over various tundra types and relate them to environmental variables such as soil properties and weather, in hopes of understanding more about how future climate change will impact the land surface and how these i...


Variability in peat plateau energy balance and water chemistry along a warming gradient
Principal Investigator: English, Michael C
Licenced Year(s): 2013
Summary: This research is physically based on a peat plateau and a peat bog, both close to Yellowknife. There are two primary objectives to this research. The first involves quantifying surface energy balances in areas where degradation of peat is pronounced and where it is not. Suprapermafrost water from the degraded and non-degraded sites will be analyzed for nutrients and dissolved organic carbon (DOC) ...


Thermal State of Permafrost
Principal Investigator: Siegfried, Dian
Licenced Year(s): 2013 2010
Summary: The objective of this project is to continue an ongoing long-term monitoring of permafrost temperatures on Banks Island and Mould Bay. The research team is currently monitoring active layer and permafrost temperatures, active layer soil moisture, air temperature, and snow depth at this site using a datalogger and sensors from Campbell Scientific (Logan, UT). In August, 2010 the research team vi...


Community based permafrost and active layer monitoring program
Principal Investigator: Yoshikawa, Kenji KY
Licenced Year(s): 2013
Summary: Uniform permafrost and ground surface temperature measurements are one of the more important databases for long-term climatic study as well as remote sensing ground truthing data. Consistency in sensor depth, casing and drilling methods helps in comparison of the spatial and temporal distribution of the permafrost and seasonal conditions. The proposed partnership with the schools aids continuous m...


Duration of active-layer freeze back, Illisarvik, NWT
Principal Investigator: Gilbert, Graham L
Licenced Year(s): 2010
Summary: The objectives of this project are to define the impact of snow depth, surface vegetation, and soil characteristics on spatial and temporal variations in active-layer freeze-back in the low arctic tundra east of the Mackenzie Delta. The duration of freeze back will be determined from the ground temperatures measured at the top of permafrost. This temperature only declines at the site when the ac...


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