Impact of freeze-thaw cycles on organic carbon and metals in waters of permafrost peatlands
International audience Despite the importance of soil and surface waters freezing in permafrost landscapes, the behaviour of dissolved organic carbon (DOC), nutrients and metals during periodic freezethaw cycles (FTC) remains poorly known. The ongoing climate warming is likely to increase the freque...
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Online Access: | https://hal.science/hal-03363287 https://hal.science/hal-03363287/document https://hal.science/hal-03363287/file/Freeze-Thaw%20cycles_%20Payandi%20Rolland_2021.pdf https://doi.org/10.1016/j.chemosphere.2021.130510 |
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ftunivnantes:oai:HAL:hal-03363287v1 2023-05-15T15:10:38+02:00 Impact of freeze-thaw cycles on organic carbon and metals in waters of permafrost peatlands Payandi-Rolland, Dahédrey Shirokova, Liudmila, Labonne, Fabian Bénézeth, Pascale Pokrovsky, Oleg Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées Centre National de la Recherche Scientifique (CNRS) 2021-09 https://hal.science/hal-03363287 https://hal.science/hal-03363287/document https://hal.science/hal-03363287/file/Freeze-Thaw%20cycles_%20Payandi%20Rolland_2021.pdf https://doi.org/10.1016/j.chemosphere.2021.130510 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.chemosphere.2021.130510 hal-03363287 https://hal.science/hal-03363287 https://hal.science/hal-03363287/document https://hal.science/hal-03363287/file/Freeze-Thaw%20cycles_%20Payandi%20Rolland_2021.pdf doi:10.1016/j.chemosphere.2021.130510 info:eu-repo/semantics/OpenAccess ISSN: 0045-6535 Chemosphere https://hal.science/hal-03363287 Chemosphere, 2021, 279, pp.130510. ⟨10.1016/j.chemosphere.2021.130510⟩ ice moss lichen peat thermokarst lake river 2 [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2021 ftunivnantes https://doi.org/10.1016/j.chemosphere.2021.130510 2023-02-22T02:54:36Z International audience Despite the importance of soil and surface waters freezing in permafrost landscapes, the behaviour of dissolved organic carbon (DOC), nutrients and metals during periodic freezethaw cycles (FTC) remains poorly known. The ongoing climate warming is likely to increase the frequency of FTC in continental aquatic settings, which could modify the chemical composition of waters. In this study, we conducted 9 repetitive cycles of overnight freezing (-20 °C) and 5 hours thawing (4°C) in the laboratory using representative 0.22 µm-filtered waters from NE European permafrost peatland: leachates of vegetation and soil, and natural surface waters (depression, thermokarst lake and river). Only minor (< 5%-15%) changes of DOC concentrations, SUVA254 and molecular weight were observed in all leachates and the depression water. In contrast, several trace elements (Fe, Al, P, Mn, As, and REE) exhibited sizable variations during FTC (> 10%). The leachates and the depression water were enriched in trace elements, whereas the thermokarst lake and the river demonstrated a decrease in concentration of Fe (-39 and-94 %, respectively), Al (-9 and-85 %), and Mn (-10 and-79 %) during FTC. Overall, the observations demonstrated an increase in aliphatic low molecular weight organic matter (OM), and the precipitation of Fe, Al hydroxides and organo-mineral particles. Therefore, enhanced of frequency of FTC can favour the release of metals and toxicants from acidic OM-rich surface waters and maintain stable OM-metals-colloids in large lakes and rivers, thus regulating aquatic transport of DOC and metals from soils to the Arctic Ocean. Article in Journal/Newspaper Arctic Arctic Ocean Ice permafrost Thermokarst Université de Nantes: HAL-UNIV-NANTES Arctic Arctic Ocean Chemosphere 279 130510 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
ice moss lichen peat thermokarst lake river 2 [SDE]Environmental Sciences |
spellingShingle |
ice moss lichen peat thermokarst lake river 2 [SDE]Environmental Sciences Payandi-Rolland, Dahédrey Shirokova, Liudmila, Labonne, Fabian Bénézeth, Pascale Pokrovsky, Oleg Impact of freeze-thaw cycles on organic carbon and metals in waters of permafrost peatlands |
topic_facet |
ice moss lichen peat thermokarst lake river 2 [SDE]Environmental Sciences |
description |
International audience Despite the importance of soil and surface waters freezing in permafrost landscapes, the behaviour of dissolved organic carbon (DOC), nutrients and metals during periodic freezethaw cycles (FTC) remains poorly known. The ongoing climate warming is likely to increase the frequency of FTC in continental aquatic settings, which could modify the chemical composition of waters. In this study, we conducted 9 repetitive cycles of overnight freezing (-20 °C) and 5 hours thawing (4°C) in the laboratory using representative 0.22 µm-filtered waters from NE European permafrost peatland: leachates of vegetation and soil, and natural surface waters (depression, thermokarst lake and river). Only minor (< 5%-15%) changes of DOC concentrations, SUVA254 and molecular weight were observed in all leachates and the depression water. In contrast, several trace elements (Fe, Al, P, Mn, As, and REE) exhibited sizable variations during FTC (> 10%). The leachates and the depression water were enriched in trace elements, whereas the thermokarst lake and the river demonstrated a decrease in concentration of Fe (-39 and-94 %, respectively), Al (-9 and-85 %), and Mn (-10 and-79 %) during FTC. Overall, the observations demonstrated an increase in aliphatic low molecular weight organic matter (OM), and the precipitation of Fe, Al hydroxides and organo-mineral particles. Therefore, enhanced of frequency of FTC can favour the release of metals and toxicants from acidic OM-rich surface waters and maintain stable OM-metals-colloids in large lakes and rivers, thus regulating aquatic transport of DOC and metals from soils to the Arctic Ocean. |
author2 |
Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Payandi-Rolland, Dahédrey Shirokova, Liudmila, Labonne, Fabian Bénézeth, Pascale Pokrovsky, Oleg |
author_facet |
Payandi-Rolland, Dahédrey Shirokova, Liudmila, Labonne, Fabian Bénézeth, Pascale Pokrovsky, Oleg |
author_sort |
Payandi-Rolland, Dahédrey |
title |
Impact of freeze-thaw cycles on organic carbon and metals in waters of permafrost peatlands |
title_short |
Impact of freeze-thaw cycles on organic carbon and metals in waters of permafrost peatlands |
title_full |
Impact of freeze-thaw cycles on organic carbon and metals in waters of permafrost peatlands |
title_fullStr |
Impact of freeze-thaw cycles on organic carbon and metals in waters of permafrost peatlands |
title_full_unstemmed |
Impact of freeze-thaw cycles on organic carbon and metals in waters of permafrost peatlands |
title_sort |
impact of freeze-thaw cycles on organic carbon and metals in waters of permafrost peatlands |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03363287 https://hal.science/hal-03363287/document https://hal.science/hal-03363287/file/Freeze-Thaw%20cycles_%20Payandi%20Rolland_2021.pdf https://doi.org/10.1016/j.chemosphere.2021.130510 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Ice permafrost Thermokarst |
genre_facet |
Arctic Arctic Ocean Ice permafrost Thermokarst |
op_source |
ISSN: 0045-6535 Chemosphere https://hal.science/hal-03363287 Chemosphere, 2021, 279, pp.130510. ⟨10.1016/j.chemosphere.2021.130510⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.chemosphere.2021.130510 hal-03363287 https://hal.science/hal-03363287 https://hal.science/hal-03363287/document https://hal.science/hal-03363287/file/Freeze-Thaw%20cycles_%20Payandi%20Rolland_2021.pdf doi:10.1016/j.chemosphere.2021.130510 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.chemosphere.2021.130510 |
container_title |
Chemosphere |
container_volume |
279 |
container_start_page |
130510 |
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1766341622419685376 |