Export of organic carbon, nutrients and metals by the mid-sized Pechora River to the Arctic Ocean
In contrast to good knowledge of export fluxes of carbon and metals from mainland to the Arctic Ocean by large Arctic Rivers, information on mid-sized rivers is limited, which prevents determining current status and foreseeing future changes in riverine export induced by climate change. Here we focu...
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fttomskstateuniv:koha:001133267 2024-05-19T07:35:10+00:00 Export of organic carbon, nutrients and metals by the mid-sized Pechora River to the Arctic Ocean Chupakov, Artem V. Pokrovsky, Oleg S. Moreva, Olga Y. Kotova, Ekaterina I. Vorobyeva, Taissia Y. Shirokova, Liudmila S. 2023 https://doi.org/10.1016/j.chemgeo.2023.121524 https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001133267 eng eng koha:001133267 doi:10.1016/j.chemgeo.2023.121524 https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001133267 Chemical geology. 2023. Vol. 632. P. 121524 (1-16) органический углерод микроэлементы вечная мерзлота торфяники коллоиды статьи в журналах info:eu-repo/semantics/article 2023 fttomskstateuniv https://doi.org/10.1016/j.chemgeo.2023.121524 2024-04-26T01:04:39Z In contrast to good knowledge of export fluxes of carbon and metals from mainland to the Arctic Ocean by large Arctic Rivers, information on mid-sized rivers is limited, which prevents determining current status and foreseeing future changes in riverine export induced by climate change. Here we focused on one of the ‘middle eight’ Arctic rivers. The Pechora River (Swatershed = 322,000 km2) is the second largest European Arctic river draining through boreal forest and peatlands with partial (∼ 40%) permafrost coverage. Over 4 consecutive years (2015–2019), we measured weekly to monthly concentrations of carbon, major nutrients, and 40 major and trace elements in filtered (< 0.45 μm) river water at the terminal gauging stations for the Pechora River. The dependences between dissolved element concentration and river discharge over the full period of observation revealed 3 groups of major and trace solutes according to their seasonal behavior. Group 1 was comprised of Dissolved Inorganic Carbon (DIC), major anions (Cl, SO4), alkalis (Li, Na, K, Rb), alkaline-earth metals (Mg, Ca, Sr, Ba), elements present in the form of labile anions and neutral molecules (B, Si, Ge, Mo, Sb) and U. It demonstrated minimal concentrations during spring flooding and autumn high flow events, and maximal concentrations during winter base flow. Concentrations of these element negatively correlated with discharge. These elements primarily reflected the dominant sedimentary lithology of the Pechora catchment and were controlled by influx of underground waters hosted in carbonate rocks. Group 2 included DOC and low-mobility trivalent and tetravalent hydrolysates (Be, Al, Ga, Y, REEs, Ti, Zr, Hf, Th) and some trace metals (V, Cr, Cs, Nb). The transport of these elements to the river from the catchment likely occurred via surface and shallow subsurface waters due to leaching from organic-rich litter layer, and their concentrations positively correlated with discharge. Finally, group 3 involved major- (P, N, K) and micro-nutrients (Fe, Mn, ... Article in Journal/Newspaper Arctic Arctic Ocean Climate change Pechora permafrost вечная мерзлота Tomsk State University Research Library Chemical Geology 632 121524 |
institution |
Open Polar |
collection |
Tomsk State University Research Library |
op_collection_id |
fttomskstateuniv |
language |
English |
topic |
органический углерод микроэлементы вечная мерзлота торфяники коллоиды |
spellingShingle |
органический углерод микроэлементы вечная мерзлота торфяники коллоиды Chupakov, Artem V. Pokrovsky, Oleg S. Moreva, Olga Y. Kotova, Ekaterina I. Vorobyeva, Taissia Y. Shirokova, Liudmila S. Export of organic carbon, nutrients and metals by the mid-sized Pechora River to the Arctic Ocean |
topic_facet |
органический углерод микроэлементы вечная мерзлота торфяники коллоиды |
description |
In contrast to good knowledge of export fluxes of carbon and metals from mainland to the Arctic Ocean by large Arctic Rivers, information on mid-sized rivers is limited, which prevents determining current status and foreseeing future changes in riverine export induced by climate change. Here we focused on one of the ‘middle eight’ Arctic rivers. The Pechora River (Swatershed = 322,000 km2) is the second largest European Arctic river draining through boreal forest and peatlands with partial (∼ 40%) permafrost coverage. Over 4 consecutive years (2015–2019), we measured weekly to monthly concentrations of carbon, major nutrients, and 40 major and trace elements in filtered (< 0.45 μm) river water at the terminal gauging stations for the Pechora River. The dependences between dissolved element concentration and river discharge over the full period of observation revealed 3 groups of major and trace solutes according to their seasonal behavior. Group 1 was comprised of Dissolved Inorganic Carbon (DIC), major anions (Cl, SO4), alkalis (Li, Na, K, Rb), alkaline-earth metals (Mg, Ca, Sr, Ba), elements present in the form of labile anions and neutral molecules (B, Si, Ge, Mo, Sb) and U. It demonstrated minimal concentrations during spring flooding and autumn high flow events, and maximal concentrations during winter base flow. Concentrations of these element negatively correlated with discharge. These elements primarily reflected the dominant sedimentary lithology of the Pechora catchment and were controlled by influx of underground waters hosted in carbonate rocks. Group 2 included DOC and low-mobility trivalent and tetravalent hydrolysates (Be, Al, Ga, Y, REEs, Ti, Zr, Hf, Th) and some trace metals (V, Cr, Cs, Nb). The transport of these elements to the river from the catchment likely occurred via surface and shallow subsurface waters due to leaching from organic-rich litter layer, and their concentrations positively correlated with discharge. Finally, group 3 involved major- (P, N, K) and micro-nutrients (Fe, Mn, ... |
format |
Article in Journal/Newspaper |
author |
Chupakov, Artem V. Pokrovsky, Oleg S. Moreva, Olga Y. Kotova, Ekaterina I. Vorobyeva, Taissia Y. Shirokova, Liudmila S. |
author_facet |
Chupakov, Artem V. Pokrovsky, Oleg S. Moreva, Olga Y. Kotova, Ekaterina I. Vorobyeva, Taissia Y. Shirokova, Liudmila S. |
author_sort |
Chupakov, Artem V. |
title |
Export of organic carbon, nutrients and metals by the mid-sized Pechora River to the Arctic Ocean |
title_short |
Export of organic carbon, nutrients and metals by the mid-sized Pechora River to the Arctic Ocean |
title_full |
Export of organic carbon, nutrients and metals by the mid-sized Pechora River to the Arctic Ocean |
title_fullStr |
Export of organic carbon, nutrients and metals by the mid-sized Pechora River to the Arctic Ocean |
title_full_unstemmed |
Export of organic carbon, nutrients and metals by the mid-sized Pechora River to the Arctic Ocean |
title_sort |
export of organic carbon, nutrients and metals by the mid-sized pechora river to the arctic ocean |
publishDate |
2023 |
url |
https://doi.org/10.1016/j.chemgeo.2023.121524 https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001133267 |
genre |
Arctic Arctic Ocean Climate change Pechora permafrost вечная мерзлота |
genre_facet |
Arctic Arctic Ocean Climate change Pechora permafrost вечная мерзлота |
op_source |
Chemical geology. 2023. Vol. 632. P. 121524 (1-16) |
op_relation |
koha:001133267 doi:10.1016/j.chemgeo.2023.121524 https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001133267 |
op_doi |
https://doi.org/10.1016/j.chemgeo.2023.121524 |
container_title |
Chemical Geology |
container_volume |
632 |
container_start_page |
121524 |
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1799473640733933568 |