Articles | Volume 23, issue 4
https://doi.org/10.5194/bg-23-1403-2026
© 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-23-1403-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Long-term effects of drainage and rewetting on the degradation and preservation of peat organic matter in sub-tropical climate
Guy Sapir
The Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
Geological Survey of Israel, Jerusalem, Israel
Institute of Soil, Water and Environmental Sciences, Volcani Institute, Agricultural Research Organization, Rishon Lezion, Israel
Alon Angert
The Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
Yoav Oved Rosenberg
Geological Survey of Israel, Jerusalem, Israel
Rotem Golan
CORRESPONDING AUTHOR
Institute of Soil, Water and Environmental Sciences, Volcani Institute, Agricultural Research Organization, Rishon Lezion, Israel
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Thermokarst lakes have formed over thousands of years from permafrost thaw in the Arctic. Here, we quantify the change in methane production rates as thermokarst lakes evolve through an incubation-based approach of measuring and comparing methane production rates and organic carbon lability between a more mature thermokarst lake and a young dynamic thermokarst lake. We also show the use of the Rock-Eval analysis of organic carbon along the sediments as a proxy for organic susceptibility for methanogenesis.
Tal Weiner, Yoav O. Rosenberg, and Alon Angert
EGUsphere, https://doi.org/10.5194/egusphere-2025-2774, https://doi.org/10.5194/egusphere-2025-2774, 2025
Preprint archived
Short summary
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Soil organic matter stores most of the terrestrial carbon, and changes in this storage can have a significant effect on the global carbon cycle. Here we estimated the long-term soil organic matter stability by measuring emission products from soil pyrolysis and measured the respiratory carbon dioxide and oxygen fluxes in soil incubations at different temperatures, to learn about the short-term processes, and to achieve a more complete understanding of the state of the organic matter in the soil.
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Short summary
Peatland drainage causes over 3.5 % of global anthropogenic GHG emissions, with ~75 % from warm climates. This study examines a drained and partially rewetted warm-climate wetland. Over 66 years, drainage caused ~70 % loss of soil organic matter and substantial CO2 emissions. Rewetting, initiating ~30 years ago, helped preserve organic matter. Yet, long-term data and modeling shows a limited window for its effectiveness, highlighting the need to prioritize sites based on time since drainage.
Peatland drainage causes over 3.5 % of global anthropogenic GHG emissions, with ~75 % from warm...
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