Articles | Volume 19, issue 21
Biogeosciences, 19, 5059–5077, 2022
https://doi.org/10.5194/bg-19-5059-2022
Biogeosciences, 19, 5059–5077, 2022
https://doi.org/10.5194/bg-19-5059-2022
Research article
 | Highlight paper
04 Nov 2022
Research article  | Highlight paper | 04 Nov 2022

Highest methane concentrations in an Arctic river linked to local terrestrial inputs

Karel Castro-Morales et al.

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Revised manuscript not accepted
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Cited articles

AMAP (Eds.): Snow, Water, Ice and Permafrost in the Arctic (SWIPA), Oslo, Norway, ISBN 978-82-7971-101-8, 2017. 
Amorocho, J. and Devries, J. J.: A new evaluation of the wind stress coefficient over water surfaces, J. Geophys. Res., 85, 433–442, https://doi.org/10.1029/JC085iC01p00433, 1980. 
Bogard, J. M., del Giorgio, P. A., Boutet, L., Garcia Chavez, M. C., Prairie, Y. T., Merante, A., and Derry, A. M.: Oxic water column methanogenesis as major component of aquatic CH4 fluxes, Nat. Commun., 5, 5250, https://doi.org/10.1038/ncomms6350, 2014. 
Bring, A., Fedorova, I., Dibike, Y., Hinzman, L., Mård, J., Mernild, S. H., Prowse, T. D., Semenova, O., Stuefer, S. L., and Woo, M.-K.: Arctic terrestrial hydrology: a synthesis of processes, regional effects, and research challenges, J. Geophys. Res.-Biogeo., 121, 621–649, https://doi.org/10.1002/2015JG003131, 2016. 
Bussmann, I.: Distribution of methane in the Lena Delta and Buor-Khaya Bay, Russia, Biogeosciences, 10, 4641–4652, https://doi.org/10.5194/bg-10-4641-2013, 2013. 
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Co-editor-in-chief
The Arctic is a hot spot of warming triggering methane releases from thawing permafrost. This study by Castro-Morales and Co-Workers provides new insights into the transport of methane from soil to rivers. This work makes an essential contribution to comprehending the magnitude of methane emissions in Arctic rivers and potential contribution to the global methane budget under climate change.
Short summary
Permafrost thaw releases methane that can be emitted into the atmosphere or transported by Arctic rivers. Methane measurements are lacking in large Arctic river regions. In the Kolyma River (northeast Siberia), we measured dissolved methane to map its distribution with great spatial detail. The river’s edge and river junctions had the highest methane concentrations compared to other river areas. Microbial communities in the river showed that the river’s methane likely is from the adjacent land.
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