Carbon Flux and Concentration Data in areas of Nunavik and Nunavut

Carbon fluxes and concentrations (carbon dioxide, CO2, and methane, CH4) were measured in various aquatic and terrestrial ecosystems across the eastern Canadian Arctic. Firstly, this study aimed to quantify summer CO2 and CH4 emissions for the full range of aquatic and terrestrial ecosystems in the subarctic zone, more exactly in the Kuujjuarapik area, and to examine the importance of limnology, vegetation cover and underlying substrate on spatial variations in C emissions. Emissions of CO2 and CH4 were measured using a static flux chamber (SFC) and concentrations were determined by dual detector gas chromatography. These fluxes were then scaled by cover type to give a first estimate of this subarctic region's landscape scale summer emissions of CO2 and CH4. Secondly, another objective of this research was to determine net ecosystem exchange (NEE) in the eastern Canadian subarctic ecosystems, more precisely over shrub vegetation in forest tundra, and to examine the implication of climatic factors, such as precipitation and temperature, on annual and seasonal variability. An open path Eddy Covariance System, including 3D anemometer, CO2/H2O open path infrared gas analyzer and specific meteorological sensors were used for continuous in situ measurements. Carbon dioxide exchanges were then compiled to give a first estimate of NEE budget of this subarctic region. Finally, we aimed to compare soil C content with the general trends of CO2 exchange along a gradient spanning 55° to 73°N in the Canadian eastern Arctic and to relate this to spatial trends in vegetation communities. Emissions of CO2 and CH4 over soil were measured using a static flux chamber (SFC) and concentrations were determined by dual detector gas chromatography and infrared analyzer. NEE were measured using BOWEN RATIO systems, and closed path infrared analyzer. The data set includes measurements from Kuujjuarapik, Umiujaq, Pond Inlet and Bylot Island (2006, 2007, 2008 and 2009).

Metadata Access
Creator Poissant, Laurier; Pilote, Martin; Canario, Joao; Constant, Philippe; Nogueira, Marta
Publisher Canadian Cryospheric Information Network
Contributor Polar Data Catalogue
Publication Year 2015
Rights Research programs, CCIN, or ArcticNet take no liability for the use or transmission of this data
OpenAccess true
Contact martin.pilote(at); pdc(at)
Language English
Format Computer file
Discipline Environmental Research
Spatial Coverage (-80.000W, 55.300S, -76.500E, 73.100N)
Temporal Coverage Begin 2006-07-01T00:00:00Z
Temporal Coverage End 2010-09-30T00:00:00Z