Articles | Volume 19, issue 17
https://doi.org/10.5194/bg-19-3959-2022
© Author(s) 2022. 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-19-3959-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
31 Aug 2022
Research article |
| 31 Aug 2022
| 31 Aug 2022
The dominant role of sunlight in degrading winter dissolved organic matter from a thermokarst lake in a subarctic peatland
Flora Mazoyer
CORRESPONDING AUTHOR
Laboratoire de limnologie nordique, Centre Eau Terre Environnement, Institut national de la recherche scientifique, Québec, QC, Canada
Centre for Northern Studies, Université Laval, Québec, QC,
Canada
Isabelle Laurion
CORRESPONDING AUTHOR
Laboratoire de limnologie nordique, Centre Eau Terre Environnement, Institut national de la recherche scientifique, Québec, QC, Canada
Centre for Northern Studies, Université Laval, Québec, QC,
Canada
Milla Rautio
Centre for Northern Studies, Université Laval, Québec, QC,
Canada
Laboratoire des sciences aquatiques, Département des sciences fondamentales, Université du Québec à Chicoutimi, Québec, QC, Canada
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Cited
20 citations as recorded by crossref.
- Seasonal organic matter dynamics in thermokarst lakes of a degrading palsa-rich sporadic permafrost zone (Nunavik, Canada) D. Folhas et al. https://doi.org/10.1016/j.orggeochem.2026.105186
- Variability in lake bacterial growth and primary production under lake ice: Evidence from early winter to spring melt E. Kivilä et al. https://doi.org/10.1002/lno.12447
- The ratio but not individual of fragile to refractory DOM affects greenhouse gases release in different trophic level lakes J. Gao et al. https://doi.org/10.1016/j.jenvman.2023.119914
- Photoinduced Evolutions of Permafrost-Derived Carbon in Subarctic Thermokarst Pond Surface Waters T. Wang et al. https://doi.org/10.1021/acs.est.4c05320
- The double-edged environmental effect of dissolved organic matter in global climate change J. Zhao et al. https://doi.org/10.48130/ebp-0025-0009
- Changes in the Properties of Humic Acids Due to the Effects of High Temperatures M. Rusakova et al. https://doi.org/10.3103/S0145875224700844
- Comparative assessment of machine learning algorithms for retrieving colored dissolved organic matter (CDOM) from Sentinel-2/MSI images in the coastal waters of the Persian Gulf B. Ahmadi et al. https://doi.org/10.1016/j.ecoinf.2025.103171
- Emission of Volatile Organic Compounds to the Atmosphere from Photochemistry in Thermokarst Ponds in Subarctic Canada D. Fillion et al. https://doi.org/10.1021/acsearthspacechem.3c00336
- The response of aquatic ecosystems to the interactive effects of stratospheric ozone depletion, UV radiation, and climate change P. Neale et al. https://doi.org/10.1007/s43630-023-00370-z
- Regulation of DOM components on lake greenhouse gas emissions J. Zhang et al. https://doi.org/10.1016/j.watbs.2026.100652
- Quantifying groundwater exchanges in the water balance of small thermokarst ponds: implications for carbon cycling R. Somera et al. https://doi.org/10.1016/j.jhydrol.2025.133964
- Canal networks regulate aquatic losses of carbon from degraded tropical peatlands J. Bowen et al. https://doi.org/10.1038/s41561-024-01383-8
- Evolving trends in fluorescence spectroscopy techniques for food quality and safety: A review H. Gu et al. https://doi.org/10.1016/j.jfca.2024.106212
- Natural organic matter dynamics in permafrost peatlands: Critical overview of recent findings and characterization tools D. Folhas et al. https://doi.org/10.1016/j.trac.2025.118153
- Photo–biodegradation drives organic matter-mediated carbon–nitrogen–sulfur cycling in the reservoir's surface-layer: A multi-index analysis H. Wang et al. https://doi.org/10.1016/j.envres.2025.123458
- Seasonal Contrasts in Dissolved Selenium Dynamics in Subarctic Thaw Lakes A. Laberge-Carignan et al. https://doi.org/10.1021/acsearthspacechem.4c00041
- Microbiome and plasmidome shifts drive carbon, nitrogen, and greenhouse gas dynamics within transitioning permafrost M. Leroy et al. https://doi.org/10.1186/s40793-026-00892-w
- Seasonal and spatial pattern of dissolved organic matter biodegradation and photodegradation in boreal humic waters A. Chupakov et al. https://doi.org/10.5194/bg-21-5725-2024
- Sunlight Induces the Production of Atmospheric Volatile Organic Compounds (VOCs) from Thermokarst Ponds T. Wang et al. https://doi.org/10.1021/acs.est.3c03303
- Transformation of dissolved organic matter and associated metals in boreal mire and river waters: Effects of biota and sunlight O. Drozdova et al. https://doi.org/10.1016/j.watres.2025.123756
20 citations as recorded by crossref.
- Seasonal organic matter dynamics in thermokarst lakes of a degrading palsa-rich sporadic permafrost zone (Nunavik, Canada) D. Folhas et al. https://doi.org/10.1016/j.orggeochem.2026.105186
- Variability in lake bacterial growth and primary production under lake ice: Evidence from early winter to spring melt E. Kivilä et al. https://doi.org/10.1002/lno.12447
- The ratio but not individual of fragile to refractory DOM affects greenhouse gases release in different trophic level lakes J. Gao et al. https://doi.org/10.1016/j.jenvman.2023.119914
- Photoinduced Evolutions of Permafrost-Derived Carbon in Subarctic Thermokarst Pond Surface Waters T. Wang et al. https://doi.org/10.1021/acs.est.4c05320
- The double-edged environmental effect of dissolved organic matter in global climate change J. Zhao et al. https://doi.org/10.48130/ebp-0025-0009
- Changes in the Properties of Humic Acids Due to the Effects of High Temperatures M. Rusakova et al. https://doi.org/10.3103/S0145875224700844
- Comparative assessment of machine learning algorithms for retrieving colored dissolved organic matter (CDOM) from Sentinel-2/MSI images in the coastal waters of the Persian Gulf B. Ahmadi et al. https://doi.org/10.1016/j.ecoinf.2025.103171
- Emission of Volatile Organic Compounds to the Atmosphere from Photochemistry in Thermokarst Ponds in Subarctic Canada D. Fillion et al. https://doi.org/10.1021/acsearthspacechem.3c00336
- The response of aquatic ecosystems to the interactive effects of stratospheric ozone depletion, UV radiation, and climate change P. Neale et al. https://doi.org/10.1007/s43630-023-00370-z
- Regulation of DOM components on lake greenhouse gas emissions J. Zhang et al. https://doi.org/10.1016/j.watbs.2026.100652
- Quantifying groundwater exchanges in the water balance of small thermokarst ponds: implications for carbon cycling R. Somera et al. https://doi.org/10.1016/j.jhydrol.2025.133964
- Canal networks regulate aquatic losses of carbon from degraded tropical peatlands J. Bowen et al. https://doi.org/10.1038/s41561-024-01383-8
- Evolving trends in fluorescence spectroscopy techniques for food quality and safety: A review H. Gu et al. https://doi.org/10.1016/j.jfca.2024.106212
- Natural organic matter dynamics in permafrost peatlands: Critical overview of recent findings and characterization tools D. Folhas et al. https://doi.org/10.1016/j.trac.2025.118153
- Photo–biodegradation drives organic matter-mediated carbon–nitrogen–sulfur cycling in the reservoir's surface-layer: A multi-index analysis H. Wang et al. https://doi.org/10.1016/j.envres.2025.123458
- Seasonal Contrasts in Dissolved Selenium Dynamics in Subarctic Thaw Lakes A. Laberge-Carignan et al. https://doi.org/10.1021/acsearthspacechem.4c00041
- Microbiome and plasmidome shifts drive carbon, nitrogen, and greenhouse gas dynamics within transitioning permafrost M. Leroy et al. https://doi.org/10.1186/s40793-026-00892-w
- Seasonal and spatial pattern of dissolved organic matter biodegradation and photodegradation in boreal humic waters A. Chupakov et al. https://doi.org/10.5194/bg-21-5725-2024
- Sunlight Induces the Production of Atmospheric Volatile Organic Compounds (VOCs) from Thermokarst Ponds T. Wang et al. https://doi.org/10.1021/acs.est.3c03303
- Transformation of dissolved organic matter and associated metals in boreal mire and river waters: Effects of biota and sunlight O. Drozdova et al. https://doi.org/10.1016/j.watres.2025.123756
Saved (final revised paper)
Latest update: 13 Jun 2026
Short summary
Dissolved organic matter collected at the end of winter from a peatland thermokarst lake was highly transformed and degraded by sunlight, leading to bacterial stimulation and CO2 production, but a fraction was also potentially lost by photoflocculation. Over 18 days, 18 % of the incubated dissolved organic matter was lost under sunlight, while dark bacterial degradation was negligible. Sunlight could have a marked effect on carbon cycling in organic-rich thermokarst lakes after ice-off.
Dissolved organic matter collected at the end of winter from a peatland thermokarst lake was...
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