Articles | Volume 12, issue 23
Biogeosciences, 12, 7279–7298, 2015
https://doi.org/10.5194/bg-12-7279-2015

Special issue: Freshwater ecosystems in changing permafrost landscapes

Biogeosciences, 12, 7279–7298, 2015
https://doi.org/10.5194/bg-12-7279-2015
Research article
14 Dec 2015
Research article | 14 Dec 2015

Modern to millennium-old greenhouse gases emitted from ponds and lakes of the Eastern Canadian Arctic (Bylot Island, Nunavut)

F. Bouchard et al.

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Cited articles

Abnizova, A., Siemens, J., Langer, M., and Boike, J.: Small ponds with major impact: The relevance of ponds and lakes in permafrost landscapes to carbon dioxide emissions, Global Biogeochem. Cycles, 26, https://doi.org/10.1029/2011gb004237, 2012.
Allard, M.: Geomorphological changes and permafrost dynamics: Key factors in changing arctic ecosystems. An example from Bylot Island, Nunavut, Canada, Geoscience Canada, 23, 205–212, 1996.
Alstad, K. P. and Whiticar, M. J.: Carbon and hydrogen isotope ratio characterization of methane dynamics for Fluxnet Peatland Ecosystems, Org. Geochem., 42, 548–558, https://doi.org/10.1016/j.orggeochem.2011.03.004, 2011.
Bastviken, D., Cole, J., Pace, M., and Tranvik, L.: Methane emissions from lakes: Dependence of lake characteristics, two regional assessments, and a global estimate, Global Biogeochem. Cycles, 18, GB4009, https://doi.org/10.1029/2004GB002238, 2004.
Bastviken, D., Cole, J. J., Pace, M. L., and Van de Bogert, M. C.: Fates of methane from different lake habitats: Connecting whole-lake budgets and CH4 emissions, J. Geophys. Res.-Biogeosciences, 113, 13, https://doi.org/10.1029/2007jg000608, 2008.
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We report on greenhouse gas (GHG) emissions in permafrost aquatic systems of the Eastern Canadian Arctic. We found strikingly different ages, sources and emission rates depending on aquatic system types. Small and shallow ponds generally emitted young (modern to a few centuries old) GHG, whereas larger and deeper lakes released much older GHG, in particular millennium-old CH4 from lake central areas. To our knowledge, this work is the first to report on GHG age from Canadian Arctic lakes.
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