Articles | Volume 12, issue 11
Biogeosciences, 12, 3197–3223, 2015
https://doi.org/10.5194/bg-12-3197-2015

Special issue: Freshwater ecosystems in changing permafrost landscapes

Biogeosciences, 12, 3197–3223, 2015
https://doi.org/10.5194/bg-12-3197-2015

Research article 02 Jun 2015

Research article | 02 Jun 2015

Methane and carbon dioxide emissions from 40 lakes along a north–south latitudinal transect in Alaska

A. Sepulveda-Jauregui et al.

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Cited articles

Abril, G., Guerin, F., Richard, S., Delmas, R., Galy-Lacaux, C., Gosse, P., Tremblay, A., Varfalvy, L., Dos Santos, M. A., and Matvienko, B.: Carbon dioxide and methane emissions and the carbon budget of a 10-year old tropical reservoir (Petit Saut, French Guiana), Global Biogeochem. Cy., 19, G02024, https://doi.org/10.1029/2007JG000608, 2005.
Arp, C. D. and Jones, B. M.: Geography of Alaska lake districts: Identification, description, and analysis of lake-rich regions of a diverse and dynamic state: US Geological Survey Scientific Investigations Report in: U.S.G.S.S.I., Gibbs, B., Fabian-Marks, J., Richey, B. J., Rogers, L., Richey, B. J., and Wahlstrom, S., USA, 2008–5215, 1–40, 2009.
Arp, C. D., Jones, B. M., and Grosse, G.: Recent lake ice-out phenology within and among lake districts of Alaska, USA, Limnol. and Oceanogr., 58, 2013–2028, 2013.
Bastviken, D., Ejlertsson, J., and Tranvik, L.: Measurement of Methane Oxidation in Lakes: A Comparison of Methods, Environ. Sci. Technol., 36, 3354–3361, 2002.
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. Cy., 18, GB4009, https://doi.org/10.1029/2004GB002238, 2004.
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Short summary
This study of methane (CH4) and carbon dioxide (CO2) emission modes from 40 lakes along a latitudinal transect in Alaska revealed that thermokarst lakes formed in Pleistocene-aged icy, organic-rich yedoma-type permafrost had the highest emissions. Ebullition and diffusion were the dominant modes of CH4 and CO2 emissions, respectively. Accounting for the global warming potentials of the gases, the climate warming impact of lake CH4 emissions was 2 times higher than that of CO2.
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