Articles | Volume 23, issue 18
https://doi.org/10.5194/bg-23-6613-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-6613-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
21 Sep 2026
Research article |
| 21 Sep 2026
| 21 Sep 2026
Dynamic CO2 evasion and colloidal control of trace metals in the Lower Lena River
Yuri Ya. Kolesnichenko
National Research Tomsk State University (TSU), Lenina Ave., 36, Tomsk, 634050, Russia
Sergey N. Vorobyev
National Research Tomsk State University (TSU), Lenina Ave., 36, Tomsk, 634050, Russia
Viktor A. Nikitkin
National Research Tomsk State University (TSU), Lenina Ave., 36, Tomsk, 634050, Russia
Oleg V. Dudarev
V.I. Il’ichev Pacific Oceanological Institute Far Eastern Branch, Russian Academy of Sciences, Baltiyskaya st., 43, Vladivostok, 690041, Russia
Denis V. Chernykh
National Research Tomsk State University (TSU), Lenina Ave., 36, Tomsk, 634050, Russia
V.I. Il’ichev Pacific Oceanological Institute Far Eastern Branch, Russian Academy of Sciences, Baltiyskaya st., 43, Vladivostok, 690041, Russia
Sakhalin State University (SakhGU), Yuzhno-Sakhalinsk, Russia
Eduard A. Spivak
V.I. Il’ichev Pacific Oceanological Institute Far Eastern Branch, Russian Academy of Sciences, Baltiyskaya st., 43, Vladivostok, 690041, Russia
Sakhalin State University (SakhGU), Yuzhno-Sakhalinsk, Russia
Arkadiy V. Kurilenko
V.I. Il’ichev Pacific Oceanological Institute Far Eastern Branch, Russian Academy of Sciences, Baltiyskaya st., 43, Vladivostok, 690041, Russia
Sakhalin State University (SakhGU), Yuzhno-Sakhalinsk, Russia
Vladimir A. Kholodov
V.I. Il’ichev Pacific Oceanological Institute Far Eastern Branch, Russian Academy of Sciences, Baltiyskaya st., 43, Vladivostok, 690041, Russia
Igor P. Semiletov
National Research Tomsk State University (TSU), Lenina Ave., 36, Tomsk, 634050, Russia
V.I. Il’ichev Pacific Oceanological Institute Far Eastern Branch, Russian Academy of Sciences, Baltiyskaya st., 43, Vladivostok, 690041, Russia
Sakhalin State University (SakhGU), Yuzhno-Sakhalinsk, Russia
Oleg S. Pokrovsky
CORRESPONDING AUTHOR
Geosciences and Environment Toulouse (GET), UMR 5563, CNRS, 14 Avenue Édouard Belin, 31400 Toulouse, France
N. Laverov Federal Center for Integrated Arctic Research, Russian Academy of Sciences, Arkhangelsk, Russia
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Christine L. Olson, Kevin Schaefer, Alyssa Azaroff, Hélène Angot, Sasiri Bandara, Thomas A. Douglas, Bo Elberling, Maria Florencia Fahnestock, Xinbin Feng, Charlotte Haugk, Gustaf Hugelius, Erfan Jahangir, Sofi Jonsson, Shichang Kang, Adam Kirkwood, Jennifer Korosi, Igor Lehnherr, Artem Lim, Rinat Manasypov, Dmitriy Moskovchenko, Mina Nasr, Daniel Obrist, David Olefeldt, Connor Olson, Oleg Pokrovsky, Laura Sereni, Sarah Shakil, M. Isabel Smith, Jens Søndergaard, Jeroen Sonke, Kasia Staniszewska, Jens Strauss, Kyra St. Pierre, Lauren Thompson, Andrey Yurtaev, Yanxu Zhang, and Scott Zolkos
Earth Syst. Sci. Data, 18, 4509–4522, https://doi.org/10.5194/essd-18-4509-2026, https://doi.org/10.5194/essd-18-4509-2026, 2026
Short summary
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Permafrost regions store large amounts of mercury, a toxic pollutant that can be released as the ground warms. We combined thousands of measurements from soils, plants, water, and lake sediments into one open database to better understand where mercury is stored and how it moves. The results show clear differences among environments and reveal major data gaps, helping improve future research, monitoring, and decision-making.
Lucia Pérez-Serrano, Sergey V. Loiko, Artem Lim, Laure Gandois, Christine Hatté, Jean-Luc Rols, and Oleg S. Pokrovsky
EGUsphere, https://doi.org/10.5194/egusphere-2026-3058, https://doi.org/10.5194/egusphere-2026-3058, 2026
This preprint is open for discussion and under review for Biogeosciences (BG).
Short summary
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Permafrost peatlands under climate change are likely to release elements trapped in frozen layers. We sampled a highly ice-enriched thaw gradient in the arctic tundra. Frozen layers are characterized by a labile, microbial signature opposed to active layer porewaters homogenized through the freeze-thaw seasonal cycles. Permafrost degradation may result into the mobilization of carbon and nutrients through phosphorous consumption before hydrological export.
Albin Eriksson, Birgit Wild, Wei-Li Hong, Henry Holmstrand, Francisco J. A. Nascimento, Stefano Bonaglia, Denis Kosmach, Igor Semiletov, Natalia Shakhova, and Örjan Gustafsson
Biogeosciences, 23, 1459–1475, https://doi.org/10.5194/bg-23-1459-2026, https://doi.org/10.5194/bg-23-1459-2026, 2026
Short summary
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Thawing subsea permafrost in the East Siberian Arctic Seas releases methane, a potent greenhouse gas. Using molecular fossils in sediments, we traced aerobic methane oxidation as a proxy of enhanced methane cycling across the Laptev Sea, including in regions once thought low in emissions. This approach captures long-term patterns of methane cycling over years-decades , overcoming limits of short-term seawater measurements and highlights the importance of the Laptev Sea in Arctic methane cycling.
Artem G. Lim, Ivan V. Krickov, Sergey N. Vorobyev, Mikhail A. Korets, Sergey Kopysov, Liudmila S. Shirokova, Jan Karlsson, and Oleg S. Pokrovsky
Biogeosciences, 19, 5859–5877, https://doi.org/10.5194/bg-19-5859-2022, https://doi.org/10.5194/bg-19-5859-2022, 2022
Short summary
Short summary
In order to quantify C transport and emission and main environmental factors controlling the C cycle in Siberian rivers, we investigated the largest tributary of the Ob River, the Ket River basin, by measuring spatial and seasonal variations in carbon CO2 and CH4 concentrations and emissions together with hydrochemical analyses. The obtained results are useful for large-scale modeling of C emission and export fluxes from permafrost-free boreal rivers of an underrepresented region of the world.
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Short summary
We studied 800 kilometers of the lower Lena River in Siberia to understand how this large Arctic river releases climate-warming gases and carries natural elements from frozen landscapes to the ocean. Using boat-based measurements and water samples, we found that CO2 release changes strongly over short distances, while CH4 variations are very small. Most dissolved carbon stayed stable, and many metals were carried by tiny natural particles. Warming and thawing ground may shift these balances.
We studied 800 kilometers of the lower Lena River in Siberia to understand how this large Arctic...
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