Abstract

The fate of the vast stocks of organic carbon stored in permafrost of the Western Siberian Lowland, the world’s largest peatland, is uncertain. Specifically, the amount of greenhouse gas emissions from rivers in the region is unknown. Here we present estimates of annual CO2 emissions from 58 rivers across all permafrost zones of the Western Siberian Lowland, between 56 and 67° N. We find that emissions peak at the permafrost boundary, and decrease where permafrost is more prevalent and in colder climatic conditions. River CO2 emissions were high, and on average two times greater than downstream carbon export. We suggest that high emissions and emission/export ratios are a result of warm temperatures and the long transit times of river water. We show that rivers in the Western Siberian Lowland play an important role in the carbon cycle by degassing terrestrial carbon before its transport to the Arctic Ocean, and suggest that changes in both temperature and precipitation are important for understanding and predicting high-latitude river CO2 emissions in a changing climate.

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Acknowledgements

The study was part of the JPI Climate initiative, financially supported by VR (the Swedish Research Council) grant no. 325-2014-6898 to J.K. Additional funding from RNF (RSCF) grant no. 18-17-00237, RFBR grant no. 17-55-16008 and RF Federal Target Program RFMEFI58717X0036 ‘Kolmogorov’ to O.S.P. and S.N.K. as well as NERC grant no. NE/M019896/1 to C.S. is acknowledged. The authors thank A. Sorochinskiy and A. Lim for assistance in the field, as well as M. Myrstener, M. Klaus and S. Monteux for advice on data analysis. L. Kovaleva is acknowledged for artwork.

Author information

Affiliations

  1. Climate Impacts Research Centre, Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden

    • S. Serikova
    •  & J. Karlsson
  2. GET UMR 5563 CNRS, Geoscience and Environment, University of Toulouse, Toulouse, France

    • O. S. Pokrovsky
    •  & L. S. Shirokova
  3. University of Aberdeen, Kings College, Aberdeen, Scotland

    • P. Ala-Aho
    • , C. Soulsby
    •  & D. Tetzlaff
  4. Water Resources and Environmental Engineering Research Unit, Faculty of Technology, University of Oulu, Oulu, Finland

    • P. Ala-Aho
  5. Organization of the Russian Academy of Sciences A.M. Obukhov Institute of Atmospheric Physics RAS, Moscow, Russia

    • V. Kazantsev
  6. BIO-GEO-CLIM Laboratory, Tomsk State University, Tomsk, Russia

    • S. N. Kirpotin
    • , I. V. Krickov
    •  & R. M. Manasypov
  7. Institute of Monitoring of Climatic and Ecological Systems SB RAS, Tomsk, Russia

    • S. G. Kopysov
  8. Department of Forest Ecology and Management, The Swedish University of Agricultural Sciences, Umeå, Sweden

    • H. Laudon
  9. N. Laverov Federal Center for Integrated Arctic Research, IEPS, RAS, Arkhangelsk, Russia

    • R. M. Manasypov
    •  & L. S. Shirokova
  10. IGB Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany

    • D. Tetzlaff
  11. Humboldt University Berlin, Berlin, Germany

    • D. Tetzlaff

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Contributions

J.K. and O.S.P. contributed to study design. S.N.K. organized sampling campaigns and logistics. S.S., R.M.M., I.V.K. and V.K. contributed to sampling. L.S.S. analysed the DOC and DIC samples. S.G.K. complemented data with literature material. S.S. analysed data, and prepared figures and tables. S.S., J.K., O.S.P. and H.L. wrote the paper. C.S., D.T. and P.A. helped with interpreting the results. All authors commented on the manuscript.

Competing interests

The authors declare no competing interests.

Corresponding authors

Correspondence to S. Serikova or J. Karlsson.

Supplementary information

  1. Supplementary Information

    Supplementary Figures 1–3, Supplementary Tables 1–5

  2. Supplementary Dataset

    Water chemistry parameters and watershed characteristics for each river sampled

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DOI

https://doi.org/10.1038/s41561-018-0218-1