Articles | Volume 21, issue 2
https://doi.org/10.5194/bg-21-357-2024
https://doi.org/10.5194/bg-21-357-2024
Research article
 | 
22 Jan 2024
Research article |  | 22 Jan 2024

Seasonal particulate organic carbon dynamics of the Kolyma River tributaries, Siberia

Kirsi H. Keskitalo, Lisa Bröder, Tommaso Tesi, Paul J. Mann, Dirk J. Jong, Sergio Bulte Garcia, Anna Davydova, Sergei Davydov, Nikita Zimov, Negar Haghipour, Timothy I. Eglinton, and Jorien E. Vonk

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Cited articles

Battin, T. J., Lauerwald, R., Bernhardt, E. S., Bertuzzo, E., Gómez Gener, L., Hall Jr., R. O., Hotchkiss, E., Maavara, T., Pavelsky, T. M., Ran, L., Raymond, P., Rosentreter, J. A., and Regnier, P.: River ecosystem metabolism and carbon biogeochemistry in a changing world, Nature, 613, 449–459, https://doi.org/10.1038/s41586-022-05500-8, 2023. 
Behnke, M. I., Tank, S. E., McClelland, J. W., Holmes, R. M., Haghipour, N., Eglinton, T. I., Raymond, P. A., Suslova, A., Zhulidov, A. V., Gurtovaya, T., Zimov, N., Zimov, S., Mutter, E. A., Amos, E., and Spencer, R. G. M.: Aquatic biomass is a major source to particulate organic matter export in large Arctic rivers, P. Natl. Acad. Sci. USA, 120, 1–9, https://doi.org/10.1073/pnas.2209883120, 2023. 
Bröder, L., Davydova, A., Davydov, S., Zimov, N., Haghipour, N., Eglinton, T. I., and Vonk, J. E.: Particulate Organic Matter Dynamics in a Permafrost Headwater Stream and the Kolyma River Mainstem, J. Geophys. Res.-Biogeo., 125, 1–16, https://doi.org/10.1029/2019JG005511, 2020. 
Buchhorn, M., Smets, B., Bertels, L., De Roo, B., Lesiv, M., Tsendbazar, N.-E., Herold, M., and Fritz, S.: Copernicus Global Land Service: Land Cover 100m: collection 3: epoch 2019, Globe 2020, Zenodo [data set], https://doi.org/10.5281/zenodo.3939050, 2020. 
Campeau, A., Wallin, M. B., Giesler, R., Löfgren, S., Mörth, C. M., Schiff, S., Venkiteswaran, J. J., and Bishop, K.: Multiple sources and sinks of dissolved inorganic carbon across Swedish streams, refocusing the lens of stable C isotopes, Sci. Rep., 7, 1–14, https://doi.org/10.1038/s41598-017-09049-9, 2017. 
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Short summary
Permafrost thaw releases organic carbon into waterways. Decomposition of this carbon pool emits greenhouse gases into the atmosphere, enhancing climate warming. We show that Arctic river carbon and water chemistry are different between the spring ice breakup and summer and that primary production is initiated in small Arctic rivers right after ice breakup, in contrast to in large rivers. This may have implications for fluvial carbon dynamics and greenhouse gas uptake and emission balance.
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