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BG | Articles | Volume 16, issue 23
Biogeosciences, 16, 4535–4553, 2019
https://doi.org/10.5194/bg-16-4535-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 16, 4535–4553, 2019
https://doi.org/10.5194/bg-16-4535-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 29 Nov 2019

Research article | 29 Nov 2019

Comparisons of dissolved organic matter and its optical characteristics in small low and high Arctic catchments

Caroline Coch et al.

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Abbott, B. W., Larouche, J. R., Jones, J. B., Bowden, W. B., and Balser, A. W.: Elevated dissolved organic carbon biodegradability from thawing and collapsing permafrost, J. Geophys. Res.-Biogeo., 119, 2049–2063, https://doi.org/10.1002/2014jg002678, 2014. 
ADAPT: Carbon, nitrogen and water content of the active layer from sites across the Canadian Arctic Nordicana D21, Nordicana, Québec, Canada, https://doi.org/10.5885/45327AD-5245D08606AB4F52, 2014. 
Aiken, G. R.: Fluorescence and dissolved organic matter: A chemist's perspective: Chapter 2, 35–74, https://doi.org/10.1017/CBO9781139045452.005, Cambridge University Press, 2014. 
Anderson, N. J. and Stedmon, C. A.: The effect of evapoconcentration on dissolved organic carbon concentration and quality in lakes of SW Greenland, Freshwater Biol., 52, 280–289, https://doi.org/10.1111/j.1365-2427.2006.01688.x, 2007. 
Balcarczyk, K. L., Jones, J. B., Jaffé, R., and Maie, N.: Stream dissolved organic matter bioavailability and composition in watersheds underlain with discontinuous permafrost, Biogeochemistry, 94, 255–270, https://doi.org/10.1007/s10533-009-9324-x, 2009. 
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Climate change affects Arctic ecosystems. This includes thawing of permafrost (ground below 0 °C) and an increase in rainfall. Both have substantial impacts on the chemical composition of river water. We compared the composition of small rivers in the low and high Arctic with the large Arctic rivers. In comparison, dissolved organic matter in the small rivers is more susceptible to degradation; thus, it could potentially increase carbon dioxide emissions. Rainfall events have a similar effect.
Climate change affects Arctic ecosystems. This includes thawing of permafrost (ground below...
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