Diel cycles of carbon, nutrient and metal in humic lakes of permafrost peatlands
International audience Despite the importance of surface waters of permafrost landscapes in carbon (C) emission and dissolved C and metal storage and export, the majority of available observations in high latitude aquatic systems deal with punctual or seasonal sampling without accounting for diurnal...
Published in: | Science of The Total Environment |
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Main Authors: | , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Online Access: | https://hal.science/hal-03003987 https://hal.science/hal-03003987/document https://hal.science/hal-03003987/file/Diel%20cycle%20STOTEN.pdf https://doi.org/10.1016/j.scitotenv.2020.139671 |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
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language |
English |
topic |
[SDE]Environmental Sciences [SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDE]Environmental Sciences [SDU]Sciences of the Universe [physics] Shirokova, L.S. Payandi-Rolland, D. Lim, A.G. Manasypov, R.M. Allen, J. Rols, J.-L. Bénézeth, P. Karlsson, J. Pokrovsky, O.S. Diel cycles of carbon, nutrient and metal in humic lakes of permafrost peatlands |
topic_facet |
[SDE]Environmental Sciences [SDU]Sciences of the Universe [physics] |
description |
International audience Despite the importance of surface waters of permafrost landscapes in carbon (C) emission and dissolved C and metal storage and export, the majority of available observations in high latitude aquatic systems deal with punctual or seasonal sampling without accounting for diurnal variations in temperature and primary productivity-respiration cycles. Towards providing comprehensive understanding of diel variations in CO2 emission, organic C and element concentrations in lakes of frozen peatlands, we monitored, each 2 h over 2 days, the water temperature, pH, CO2 fluxes, CO2, CH4, dissolved organic and inorganic carbon (DOC and DIC, respectively), nutrients, carboxylic acids, bacterial number, and major and trace elements in two acidic (pH = 3.6 and 4.0) and humic (DOC = 15 and 35 mg L−1) thermokarst lakes of discontinuous permafrost zone in Western Siberia. We discovered a factor of 2 to 3 higher CO2 concentrations and fluxes during the night compared to daytime in the high-DOC lake. The emission fluxes in the low-DOC lake increased from zero to negative values during the day to highly positive values during the end of night and early morning. The methane concentration varied within a factor of 5 without any link to the diurnal cycle. The bulk of dissolved (< 0.45 μm) hydrochemical parameters remained highly stable with ±10% variation in concentration over 2 days of observation (DOC, DIC, SUVA254nm, carboxylates (formate, oxalate, puryvate and glutarate), Mn, Fe, Al, other trace elements). Concentrations of Si, P, K, Cu varied within ±20% whereas those of Zn and Ni ranged by a factor of 2 to 4 without any link to diurnal pattern. Overall, the impact of diel cycle on CH4, DOC, nutrient and metal concentration was below 10%. However, neglecting night-time period may underestimate net CO2 emission by ca. 30 to 50% in small organic-rich thaw ponds and switch the CO2 exchange from uptake/zero to net emission in larger thermokarst lakes. Given the dominance of large lakes in permafrost regions, ... |
author2 |
Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT) Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) National Council for Scientific Research = Conseil national de la recherche scientifique du Liban Lebanon (CNRS-L) |
format |
Article in Journal/Newspaper |
author |
Shirokova, L.S. Payandi-Rolland, D. Lim, A.G. Manasypov, R.M. Allen, J. Rols, J.-L. Bénézeth, P. Karlsson, J. Pokrovsky, O.S. |
author_facet |
Shirokova, L.S. Payandi-Rolland, D. Lim, A.G. Manasypov, R.M. Allen, J. Rols, J.-L. Bénézeth, P. Karlsson, J. Pokrovsky, O.S. |
author_sort |
Shirokova, L.S. |
title |
Diel cycles of carbon, nutrient and metal in humic lakes of permafrost peatlands |
title_short |
Diel cycles of carbon, nutrient and metal in humic lakes of permafrost peatlands |
title_full |
Diel cycles of carbon, nutrient and metal in humic lakes of permafrost peatlands |
title_fullStr |
Diel cycles of carbon, nutrient and metal in humic lakes of permafrost peatlands |
title_full_unstemmed |
Diel cycles of carbon, nutrient and metal in humic lakes of permafrost peatlands |
title_sort |
diel cycles of carbon, nutrient and metal in humic lakes of permafrost peatlands |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03003987 https://hal.science/hal-03003987/document https://hal.science/hal-03003987/file/Diel%20cycle%20STOTEN.pdf https://doi.org/10.1016/j.scitotenv.2020.139671 |
genre |
permafrost Thermokarst Siberia |
genre_facet |
permafrost Thermokarst Siberia |
op_source |
ISSN: 0048-9697 EISSN: 1879-1026 Science of the Total Environment https://hal.science/hal-03003987 Science of the Total Environment, 2020, 737, pp.139671. ⟨10.1016/j.scitotenv.2020.139671⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2020.139671 hal-03003987 https://hal.science/hal-03003987 https://hal.science/hal-03003987/document https://hal.science/hal-03003987/file/Diel%20cycle%20STOTEN.pdf doi:10.1016/j.scitotenv.2020.139671 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.scitotenv.2020.139671 |
container_title |
Science of The Total Environment |
container_volume |
737 |
container_start_page |
139671 |
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1790606670691303424 |
spelling |
ftinsu:oai:HAL:hal-03003987v1 2024-02-11T10:07:51+01:00 Diel cycles of carbon, nutrient and metal in humic lakes of permafrost peatlands Shirokova, L.S. Payandi-Rolland, D. Lim, A.G. Manasypov, R.M. Allen, J. Rols, J.-L. Bénézeth, P. Karlsson, J. Pokrovsky, O.S. Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT) Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) National Council for Scientific Research = Conseil national de la recherche scientifique du Liban Lebanon (CNRS-L) 2020-10 https://hal.science/hal-03003987 https://hal.science/hal-03003987/document https://hal.science/hal-03003987/file/Diel%20cycle%20STOTEN.pdf https://doi.org/10.1016/j.scitotenv.2020.139671 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2020.139671 hal-03003987 https://hal.science/hal-03003987 https://hal.science/hal-03003987/document https://hal.science/hal-03003987/file/Diel%20cycle%20STOTEN.pdf doi:10.1016/j.scitotenv.2020.139671 info:eu-repo/semantics/OpenAccess ISSN: 0048-9697 EISSN: 1879-1026 Science of the Total Environment https://hal.science/hal-03003987 Science of the Total Environment, 2020, 737, pp.139671. ⟨10.1016/j.scitotenv.2020.139671⟩ [SDE]Environmental Sciences [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2020 ftinsu https://doi.org/10.1016/j.scitotenv.2020.139671 2024-01-17T17:27:19Z International audience Despite the importance of surface waters of permafrost landscapes in carbon (C) emission and dissolved C and metal storage and export, the majority of available observations in high latitude aquatic systems deal with punctual or seasonal sampling without accounting for diurnal variations in temperature and primary productivity-respiration cycles. Towards providing comprehensive understanding of diel variations in CO2 emission, organic C and element concentrations in lakes of frozen peatlands, we monitored, each 2 h over 2 days, the water temperature, pH, CO2 fluxes, CO2, CH4, dissolved organic and inorganic carbon (DOC and DIC, respectively), nutrients, carboxylic acids, bacterial number, and major and trace elements in two acidic (pH = 3.6 and 4.0) and humic (DOC = 15 and 35 mg L−1) thermokarst lakes of discontinuous permafrost zone in Western Siberia. We discovered a factor of 2 to 3 higher CO2 concentrations and fluxes during the night compared to daytime in the high-DOC lake. The emission fluxes in the low-DOC lake increased from zero to negative values during the day to highly positive values during the end of night and early morning. The methane concentration varied within a factor of 5 without any link to the diurnal cycle. The bulk of dissolved (< 0.45 μm) hydrochemical parameters remained highly stable with ±10% variation in concentration over 2 days of observation (DOC, DIC, SUVA254nm, carboxylates (formate, oxalate, puryvate and glutarate), Mn, Fe, Al, other trace elements). Concentrations of Si, P, K, Cu varied within ±20% whereas those of Zn and Ni ranged by a factor of 2 to 4 without any link to diurnal pattern. Overall, the impact of diel cycle on CH4, DOC, nutrient and metal concentration was below 10%. However, neglecting night-time period may underestimate net CO2 emission by ca. 30 to 50% in small organic-rich thaw ponds and switch the CO2 exchange from uptake/zero to net emission in larger thermokarst lakes. Given the dominance of large lakes in permafrost regions, ... Article in Journal/Newspaper permafrost Thermokarst Siberia Institut national des sciences de l'Univers: HAL-INSU Science of The Total Environment 737 139671 |