Seasonal variability of element fluxes in two Central Siberian rivers draining high latitude permafrost dominated areas
In order to constrain the origin and fluxes of elements carried by rivers of high latitude permafrost-dominated areas, major and trace element concentrations as well as Sr and U isotopic ratios were analyzed in the dissolved load of two Siberian rivers (Kochechum and Nizhnyaya Tunguska) regularly sa...
Published in: | Geochimica et Cosmochimica Acta |
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Online Access: | https://oro.open.ac.uk/39816/ https://doi.org/10.1016/j.gca.2011.03.024 |
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ftopenunivgb:oai:oro.open.ac.uk:39816 2023-06-11T04:15:56+02:00 Seasonal variability of element fluxes in two Central Siberian rivers draining high latitude permafrost dominated areas Bagard, Marie-Laure Chabaux, François Pokrovsky, Oleg S. Viers, Jérome Prokushkin, Anatoly S. Stille, Peter Rihs, Sophie Schmitt, Anne-Désirée Dupré, Bernard 2011-06-15 https://oro.open.ac.uk/39816/ https://doi.org/10.1016/j.gca.2011.03.024 unknown Bagard, Marie-Laure <http://oro.open.ac.uk/view/person/mb28757.html>; Chabaux, François; Pokrovsky, Oleg S.; Viers, Jérome; Prokushkin, Anatoly S.; Stille, Peter; Rihs, Sophie; Schmitt, Anne-Désirée and Dupré, Bernard (2011). Seasonal variability of element fluxes in two Central Siberian rivers draining high latitude permafrost dominated areas. Geochimica et Cosmochimica Acta, 75(12) pp. 3335–3357. Journal Item None PeerReviewed 2011 ftopenunivgb https://doi.org/10.1016/j.gca.2011.03.024 2023-05-28T05:51:05Z In order to constrain the origin and fluxes of elements carried by rivers of high latitude permafrost-dominated areas, major and trace element concentrations as well as Sr and U isotopic ratios were analyzed in the dissolved load of two Siberian rivers (Kochechum and Nizhnyaya Tunguska) regularly sampled over two hydrological cycles (2005–2007). Large water volumes of both rivers were also collected in spring 2008 in order to perform size separation through dialysis experiments. This study was completed by spatial sampling of the Kochechum watershed carried out during summer and by a detailed analysis of the main hydrological compartments of a small watershed. From element concentration variations along the hydrological cycle, different periods can be marked out, matching hydrological periods. During winter baseflow period (October to May) there is a concentration increase for major soluble cations and anions by an order of magnitude. The spring flood period (end of May-beginning of June) is marked by a sharp concentration decrease for soluble elements whereas dissolved organic carbon and insoluble element concentrations strongly increase. When the spring flood discharge occurs, the significant increase of aluminum and iron concentrations is related to the presence of organo-mineral colloids that mobilize insoluble elements. The study of colloidal REE reveals the occurrence of two colloid sources successively involved over time: spring colloids mainly originate from the uppermost organic-rich part of soils whereas summer colloids rather come from the deep mineral horizons. Furthermore, U and Sr isotopic ratios together with soluble cation budgets in the Kochechum river impose for soluble elements the existence of three distinct fluxes over the year: (a) at the spring flood a surface flux coming from the leaching of shallow organic soil levels and containing a significant colloidal component (b) a subsurface flux predominant during summer and fall mainly controlled by water–rock interactions within mineral soils ... Article in Journal/Newspaper permafrost The Open University: Open Research Online (ORO) Kochechum ENVELOPE(100.167,100.167,64.283,64.283) Nizhnyaya Tunguska ENVELOPE(88.067,88.067,65.800,65.800) Tunguska ENVELOPE(144.784,144.784,59.388,59.388) Geochimica et Cosmochimica Acta 75 12 3335 3357 |
institution |
Open Polar |
collection |
The Open University: Open Research Online (ORO) |
op_collection_id |
ftopenunivgb |
language |
unknown |
description |
In order to constrain the origin and fluxes of elements carried by rivers of high latitude permafrost-dominated areas, major and trace element concentrations as well as Sr and U isotopic ratios were analyzed in the dissolved load of two Siberian rivers (Kochechum and Nizhnyaya Tunguska) regularly sampled over two hydrological cycles (2005–2007). Large water volumes of both rivers were also collected in spring 2008 in order to perform size separation through dialysis experiments. This study was completed by spatial sampling of the Kochechum watershed carried out during summer and by a detailed analysis of the main hydrological compartments of a small watershed. From element concentration variations along the hydrological cycle, different periods can be marked out, matching hydrological periods. During winter baseflow period (October to May) there is a concentration increase for major soluble cations and anions by an order of magnitude. The spring flood period (end of May-beginning of June) is marked by a sharp concentration decrease for soluble elements whereas dissolved organic carbon and insoluble element concentrations strongly increase. When the spring flood discharge occurs, the significant increase of aluminum and iron concentrations is related to the presence of organo-mineral colloids that mobilize insoluble elements. The study of colloidal REE reveals the occurrence of two colloid sources successively involved over time: spring colloids mainly originate from the uppermost organic-rich part of soils whereas summer colloids rather come from the deep mineral horizons. Furthermore, U and Sr isotopic ratios together with soluble cation budgets in the Kochechum river impose for soluble elements the existence of three distinct fluxes over the year: (a) at the spring flood a surface flux coming from the leaching of shallow organic soil levels and containing a significant colloidal component (b) a subsurface flux predominant during summer and fall mainly controlled by water–rock interactions within mineral soils ... |
format |
Article in Journal/Newspaper |
author |
Bagard, Marie-Laure Chabaux, François Pokrovsky, Oleg S. Viers, Jérome Prokushkin, Anatoly S. Stille, Peter Rihs, Sophie Schmitt, Anne-Désirée Dupré, Bernard |
spellingShingle |
Bagard, Marie-Laure Chabaux, François Pokrovsky, Oleg S. Viers, Jérome Prokushkin, Anatoly S. Stille, Peter Rihs, Sophie Schmitt, Anne-Désirée Dupré, Bernard Seasonal variability of element fluxes in two Central Siberian rivers draining high latitude permafrost dominated areas |
author_facet |
Bagard, Marie-Laure Chabaux, François Pokrovsky, Oleg S. Viers, Jérome Prokushkin, Anatoly S. Stille, Peter Rihs, Sophie Schmitt, Anne-Désirée Dupré, Bernard |
author_sort |
Bagard, Marie-Laure |
title |
Seasonal variability of element fluxes in two Central Siberian rivers draining high latitude permafrost dominated areas |
title_short |
Seasonal variability of element fluxes in two Central Siberian rivers draining high latitude permafrost dominated areas |
title_full |
Seasonal variability of element fluxes in two Central Siberian rivers draining high latitude permafrost dominated areas |
title_fullStr |
Seasonal variability of element fluxes in two Central Siberian rivers draining high latitude permafrost dominated areas |
title_full_unstemmed |
Seasonal variability of element fluxes in two Central Siberian rivers draining high latitude permafrost dominated areas |
title_sort |
seasonal variability of element fluxes in two central siberian rivers draining high latitude permafrost dominated areas |
publishDate |
2011 |
url |
https://oro.open.ac.uk/39816/ https://doi.org/10.1016/j.gca.2011.03.024 |
long_lat |
ENVELOPE(100.167,100.167,64.283,64.283) ENVELOPE(88.067,88.067,65.800,65.800) ENVELOPE(144.784,144.784,59.388,59.388) |
geographic |
Kochechum Nizhnyaya Tunguska Tunguska |
geographic_facet |
Kochechum Nizhnyaya Tunguska Tunguska |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
Bagard, Marie-Laure <http://oro.open.ac.uk/view/person/mb28757.html>; Chabaux, François; Pokrovsky, Oleg S.; Viers, Jérome; Prokushkin, Anatoly S.; Stille, Peter; Rihs, Sophie; Schmitt, Anne-Désirée and Dupré, Bernard (2011). Seasonal variability of element fluxes in two Central Siberian rivers draining high latitude permafrost dominated areas. Geochimica et Cosmochimica Acta, 75(12) pp. 3335–3357. |
op_doi |
https://doi.org/10.1016/j.gca.2011.03.024 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
75 |
container_issue |
12 |
container_start_page |
3335 |
op_container_end_page |
3357 |
_version_ |
1768373211751251968 |