Dissolved organic carbon and major and trace elements in peat porewater of sporadic, discontinuous, and continuous permafrost zones of western Siberia
International audience Mobilization of dissolved organic carbon (DOC) and related trace elements (TEs) from the frozen peat to surface waters in the permafrost zone is expected to enhance under ongoing permafrost thaw and active layer thickness (ALT) deepening in high-latitude regions. The interstit...
Published in: | Biogeosciences |
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Main Authors: | , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2017
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Online Access: | https://insu.hal.science/insu-03661372 https://insu.hal.science/insu-03661372/document https://insu.hal.science/insu-03661372/file/bg-14-3561-2017.pdf https://doi.org/10.5194/bg-14-3561-2017 |
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Météo-France: HAL |
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English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Raudina, Tatiana V. Loiko, Sergey V. Lim, Artyom G. Krickov, Ivan V. Shirokova, Liudmila S. Istigechev, Georgy I. Kuzmina, Daria M. Kulizhsky, Sergey P. Vorobyev, Sergey N. Pokrovsky, Oleg S. Dissolved organic carbon and major and trace elements in peat porewater of sporadic, discontinuous, and continuous permafrost zones of western Siberia |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Mobilization of dissolved organic carbon (DOC) and related trace elements (TEs) from the frozen peat to surface waters in the permafrost zone is expected to enhance under ongoing permafrost thaw and active layer thickness (ALT) deepening in high-latitude regions. The interstitial soil solutions are efficient tracers of ongoing bio-geochemical processes in the critical zone and can help to decipher the intensity of carbon and metals migration from the soil to the rivers and further to the ocean. To this end, we collected, across a 640 km latitudinal transect of the sporadic to continuous permafrost zone of western Siberia peatlands, soil porewaters from 30 cm depth using suction cups and we analyzed DOC, dissolved inorganic carbon (DIC), and 40 major elements and TEs in 0.45 µm filtered fraction of 80 soil porewaters. Despite an expected decrease in the intensity of DOC and TE mobilization from the soil and vegetation litter to the interstitial fluids with the increase in the permafrost coverage and a decrease in the annual temperature and ALT, the DOC and many major and trace elements did not exhibit any distinct decrease in concentration along the latitudinal transect from 62.2 to 67.4° N. The DOC demonstrated a maximum of concentration at 66° N, on the border of the discontinuous/continuous permafrost zone, whereas the DOC concentration in peat soil solutions from the continuous permafrost zone was equal to or higher than that in the sporadic/discontinuous permafrost zone. Moreover, a number of major (Ca, Mg) and trace (Al, Ti, Sr, Ga, rare earth elements (REEs), Zr, Hf, Th) elements exhibited an increasing, not decreasing, northward concentration trend. We hypothesize that the effects of temperature and thickness of the ALT are of secondary importance relative to the leaching capacity of peat, which is in turn controlled by the water saturation of the peat core. The water residence time in peat pores also plays a role in enriching the fluids in some elements: the DOC, V, Cu, Pb, REEs, ... |
author2 |
Géosciences Environnement Toulouse (GET) 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)-Observatoire Midi-Pyrénées (OMP) 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) |
format |
Article in Journal/Newspaper |
author |
Raudina, Tatiana V. Loiko, Sergey V. Lim, Artyom G. Krickov, Ivan V. Shirokova, Liudmila S. Istigechev, Georgy I. Kuzmina, Daria M. Kulizhsky, Sergey P. Vorobyev, Sergey N. Pokrovsky, Oleg S. |
author_facet |
Raudina, Tatiana V. Loiko, Sergey V. Lim, Artyom G. Krickov, Ivan V. Shirokova, Liudmila S. Istigechev, Georgy I. Kuzmina, Daria M. Kulizhsky, Sergey P. Vorobyev, Sergey N. Pokrovsky, Oleg S. |
author_sort |
Raudina, Tatiana V. |
title |
Dissolved organic carbon and major and trace elements in peat porewater of sporadic, discontinuous, and continuous permafrost zones of western Siberia |
title_short |
Dissolved organic carbon and major and trace elements in peat porewater of sporadic, discontinuous, and continuous permafrost zones of western Siberia |
title_full |
Dissolved organic carbon and major and trace elements in peat porewater of sporadic, discontinuous, and continuous permafrost zones of western Siberia |
title_fullStr |
Dissolved organic carbon and major and trace elements in peat porewater of sporadic, discontinuous, and continuous permafrost zones of western Siberia |
title_full_unstemmed |
Dissolved organic carbon and major and trace elements in peat porewater of sporadic, discontinuous, and continuous permafrost zones of western Siberia |
title_sort |
dissolved organic carbon and major and trace elements in peat porewater of sporadic, discontinuous, and continuous permafrost zones of western siberia |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://insu.hal.science/insu-03661372 https://insu.hal.science/insu-03661372/document https://insu.hal.science/insu-03661372/file/bg-14-3561-2017.pdf https://doi.org/10.5194/bg-14-3561-2017 |
genre |
Active layer thickness permafrost Siberia |
genre_facet |
Active layer thickness permafrost Siberia |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://insu.hal.science/insu-03661372 Biogeosciences, 2017, 14, pp.3561-3584. ⟨10.5194/bg-14-3561-2017⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-14-3561-2017 insu-03661372 https://insu.hal.science/insu-03661372 https://insu.hal.science/insu-03661372/document https://insu.hal.science/insu-03661372/file/bg-14-3561-2017.pdf BIBCODE: 2017BGeo.14.3561R doi:10.5194/bg-14-3561-2017 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-14-3561-2017 |
container_title |
Biogeosciences |
container_volume |
14 |
container_issue |
14 |
container_start_page |
3561 |
op_container_end_page |
3584 |
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1810432717580402688 |
spelling |
ftmeteofrance:oai:HAL:insu-03661372v1 2024-09-15T17:34:54+00:00 Dissolved organic carbon and major and trace elements in peat porewater of sporadic, discontinuous, and continuous permafrost zones of western Siberia Raudina, Tatiana V. Loiko, Sergey V. Lim, Artyom G. Krickov, Ivan V. Shirokova, Liudmila S. Istigechev, Georgy I. Kuzmina, Daria M. Kulizhsky, Sergey P. Vorobyev, Sergey N. Pokrovsky, Oleg S. Géosciences Environnement Toulouse (GET) 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)-Observatoire Midi-Pyrénées (OMP) 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) 2017 https://insu.hal.science/insu-03661372 https://insu.hal.science/insu-03661372/document https://insu.hal.science/insu-03661372/file/bg-14-3561-2017.pdf https://doi.org/10.5194/bg-14-3561-2017 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-14-3561-2017 insu-03661372 https://insu.hal.science/insu-03661372 https://insu.hal.science/insu-03661372/document https://insu.hal.science/insu-03661372/file/bg-14-3561-2017.pdf BIBCODE: 2017BGeo.14.3561R doi:10.5194/bg-14-3561-2017 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://insu.hal.science/insu-03661372 Biogeosciences, 2017, 14, pp.3561-3584. ⟨10.5194/bg-14-3561-2017⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2017 ftmeteofrance https://doi.org/10.5194/bg-14-3561-2017 2024-06-25T00:10:21Z International audience Mobilization of dissolved organic carbon (DOC) and related trace elements (TEs) from the frozen peat to surface waters in the permafrost zone is expected to enhance under ongoing permafrost thaw and active layer thickness (ALT) deepening in high-latitude regions. The interstitial soil solutions are efficient tracers of ongoing bio-geochemical processes in the critical zone and can help to decipher the intensity of carbon and metals migration from the soil to the rivers and further to the ocean. To this end, we collected, across a 640 km latitudinal transect of the sporadic to continuous permafrost zone of western Siberia peatlands, soil porewaters from 30 cm depth using suction cups and we analyzed DOC, dissolved inorganic carbon (DIC), and 40 major elements and TEs in 0.45 µm filtered fraction of 80 soil porewaters. Despite an expected decrease in the intensity of DOC and TE mobilization from the soil and vegetation litter to the interstitial fluids with the increase in the permafrost coverage and a decrease in the annual temperature and ALT, the DOC and many major and trace elements did not exhibit any distinct decrease in concentration along the latitudinal transect from 62.2 to 67.4° N. The DOC demonstrated a maximum of concentration at 66° N, on the border of the discontinuous/continuous permafrost zone, whereas the DOC concentration in peat soil solutions from the continuous permafrost zone was equal to or higher than that in the sporadic/discontinuous permafrost zone. Moreover, a number of major (Ca, Mg) and trace (Al, Ti, Sr, Ga, rare earth elements (REEs), Zr, Hf, Th) elements exhibited an increasing, not decreasing, northward concentration trend. We hypothesize that the effects of temperature and thickness of the ALT are of secondary importance relative to the leaching capacity of peat, which is in turn controlled by the water saturation of the peat core. The water residence time in peat pores also plays a role in enriching the fluids in some elements: the DOC, V, Cu, Pb, REEs, ... Article in Journal/Newspaper Active layer thickness permafrost Siberia Météo-France: HAL Biogeosciences 14 14 3561 3584 |