Carbon emission and export from the Ket River, western Siberia
Despite recent progress in the understanding of the carbon (C) cycle of Siberian permafrost-affected rivers, spatial and seasonal dynamics of C export and emission from medium-sized rivers (50 000–300 000 km2 watershed area) remain poorly known. Here we studied one of the largest tributaries of the...
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Copernicus Publications
2022
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00064059 2023-05-15T17:48:49+02:00 Carbon emission and export from the Ket River, western Siberia Lim, Artem G. Krickov, Ivan V. Vorobyev, Sergey N. Korets, Mikhail A. Kopysov, Sergey Shirokova, Liudmila S. Karlsson, Jan Pokrovsky, Oleg S. 2022-12 electronic https://doi.org/10.5194/bg-19-5859-2022 https://noa.gwlb.de/receive/cop_mods_00064059 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00062942/bg-19-5859-2022.pdf https://bg.copernicus.org/articles/19/5859/2022/bg-19-5859-2022.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-19-5859-2022 https://noa.gwlb.de/receive/cop_mods_00064059 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00062942/bg-19-5859-2022.pdf https://bg.copernicus.org/articles/19/5859/2022/bg-19-5859-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/bg-19-5859-2022 2022-12-26T00:13:01Z Despite recent progress in the understanding of the carbon (C) cycle of Siberian permafrost-affected rivers, spatial and seasonal dynamics of C export and emission from medium-sized rivers (50 000–300 000 km2 watershed area) remain poorly known. Here we studied one of the largest tributaries of the Ob River, the Ket River (watershed = 94 000 km2), which drains through pristine taiga forest of the boreal zone in the West Siberian Lowland (WSL). We combined continuous and discrete measurements of carbon dioxide (CO2) concentration using submersible CO2 sensor and floating chamber flux (FCO2), with methane (CH4), dissolved organic and inorganic C (DOC and DIC, respectively), particulate organic C and total bacterial concentrations over an 800 km transect of the Ket River main stem and its 26 tributaries during spring flood (May 2019) and 12 tributaries during summer baseflow (end of August–beginning of September 2019). The partial pressure of CO2 (pCO2) was lower and less variable in the main stem (2000 to 2500 µatm) compared to that in the tributaries (2000 to 5000 µatm). In the tributaries, the pCO2 was 40 % higher during baseflow compared to spring flood, whereas in the main stem, it did not vary significantly across the seasons. The methane concentration in the main stem and tributaries was a factor of 300 to 1900 (flood period) and 100 to 150 times lower than that of CO2 and ranged from 0.05 to 2.0 µmol L−1. The FCO2 ranged from 0.4 to 2.4 g C m−2 d−1 in the main channel and from 0.5 to 5.0 g C m−2 d−1 in the tributaries, being highest during August in the tributaries and weakly dependent on the season in the main channel. During summer baseflow, the DOC aromaticity, bacterial number, and needleleaf forest coverage of the watershed positively affected CO2 concentrations and fluxes. We hypothesize that relatively low spatial and seasonal variability in FCO2 of the Ket River is due to a flat homogeneous landscape (bogs and taiga forest) that results in long water residence times and stable input of allochthonous ... Article in Journal/Newspaper ob river permafrost taiga Siberia Niedersächsisches Online-Archiv NOA Biogeosciences 19 24 5859 5877 |
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article Verlagsveröffentlichung Lim, Artem G. Krickov, Ivan V. Vorobyev, Sergey N. Korets, Mikhail A. Kopysov, Sergey Shirokova, Liudmila S. Karlsson, Jan Pokrovsky, Oleg S. Carbon emission and export from the Ket River, western Siberia |
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article Verlagsveröffentlichung |
description |
Despite recent progress in the understanding of the carbon (C) cycle of Siberian permafrost-affected rivers, spatial and seasonal dynamics of C export and emission from medium-sized rivers (50 000–300 000 km2 watershed area) remain poorly known. Here we studied one of the largest tributaries of the Ob River, the Ket River (watershed = 94 000 km2), which drains through pristine taiga forest of the boreal zone in the West Siberian Lowland (WSL). We combined continuous and discrete measurements of carbon dioxide (CO2) concentration using submersible CO2 sensor and floating chamber flux (FCO2), with methane (CH4), dissolved organic and inorganic C (DOC and DIC, respectively), particulate organic C and total bacterial concentrations over an 800 km transect of the Ket River main stem and its 26 tributaries during spring flood (May 2019) and 12 tributaries during summer baseflow (end of August–beginning of September 2019). The partial pressure of CO2 (pCO2) was lower and less variable in the main stem (2000 to 2500 µatm) compared to that in the tributaries (2000 to 5000 µatm). In the tributaries, the pCO2 was 40 % higher during baseflow compared to spring flood, whereas in the main stem, it did not vary significantly across the seasons. The methane concentration in the main stem and tributaries was a factor of 300 to 1900 (flood period) and 100 to 150 times lower than that of CO2 and ranged from 0.05 to 2.0 µmol L−1. The FCO2 ranged from 0.4 to 2.4 g C m−2 d−1 in the main channel and from 0.5 to 5.0 g C m−2 d−1 in the tributaries, being highest during August in the tributaries and weakly dependent on the season in the main channel. During summer baseflow, the DOC aromaticity, bacterial number, and needleleaf forest coverage of the watershed positively affected CO2 concentrations and fluxes. We hypothesize that relatively low spatial and seasonal variability in FCO2 of the Ket River is due to a flat homogeneous landscape (bogs and taiga forest) that results in long water residence times and stable input of allochthonous ... |
format |
Article in Journal/Newspaper |
author |
Lim, Artem G. Krickov, Ivan V. Vorobyev, Sergey N. Korets, Mikhail A. Kopysov, Sergey Shirokova, Liudmila S. Karlsson, Jan Pokrovsky, Oleg S. |
author_facet |
Lim, Artem G. Krickov, Ivan V. Vorobyev, Sergey N. Korets, Mikhail A. Kopysov, Sergey Shirokova, Liudmila S. Karlsson, Jan Pokrovsky, Oleg S. |
author_sort |
Lim, Artem G. |
title |
Carbon emission and export from the Ket River, western Siberia |
title_short |
Carbon emission and export from the Ket River, western Siberia |
title_full |
Carbon emission and export from the Ket River, western Siberia |
title_fullStr |
Carbon emission and export from the Ket River, western Siberia |
title_full_unstemmed |
Carbon emission and export from the Ket River, western Siberia |
title_sort |
carbon emission and export from the ket river, western siberia |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/bg-19-5859-2022 https://noa.gwlb.de/receive/cop_mods_00064059 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00062942/bg-19-5859-2022.pdf https://bg.copernicus.org/articles/19/5859/2022/bg-19-5859-2022.pdf |
genre |
ob river permafrost taiga Siberia |
genre_facet |
ob river permafrost taiga Siberia |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-19-5859-2022 https://noa.gwlb.de/receive/cop_mods_00064059 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00062942/bg-19-5859-2022.pdf https://bg.copernicus.org/articles/19/5859/2022/bg-19-5859-2022.pdf |
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https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
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CC-BY |
op_doi |
https://doi.org/10.5194/bg-19-5859-2022 |
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Biogeosciences |
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19 |
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24 |
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5859 |
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5877 |
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