Sizable carbon emission from the floodplain of Ob River
The Ob River floodplain is the second largest floodplain in the world. Despite its vast area, estimates of carbon (C) emissions from the Ob River floodplain are largely absent. Here we present seasonal C emission and water area extent from the main channel and the floodplain along a ~4 km reach in t...
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2021
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ftumeauniv:oai:DiVA.org:umu-187287 2023-10-09T21:54:45+02:00 Sizable carbon emission from the floodplain of Ob River Krickov, Ivan V. Serikova, Svetlana Pokrovsky, Oleg S. Vorobyev, Sergey N. Lim, Artem G. Siewert, Matthias B. Karlsson, Jan 2021 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187287 https://doi.org/10.1016/j.ecolind.2021.108164 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina 36, Tomsk, Russian Federation Swedish Geotechnical Institute, Olaus Magnus väg 35, Linköping, Sweden GET UMR 5563 CNRS, Geoscience and Environment, University of Toulouse, 14 Avenue Edouard Belin, Toulouse, France; Institute of Ecological Problems of the North, N. Laverov Federal Center for Integrated Arctic Research, Russian Academy of Sciences, Nab. Severnoi Dviny 23, Arkhangelsk, Russian Federation Ecological Indicators, 1470-160X, 2021, 131, orcid:0000-0002-2319-8190 orcid:0000-0003-2890-8873 orcid:0000-0001-5730-0694 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187287 doi:10.1016/j.ecolind.2021.108164 ISI:000703760800005 Scopus 2-s2.0-85113933123 info:eu-repo/semantics/openAccess Carbon emission Floodplain Greenhouse gases Ob river Seasonal influences Physical Geography Naturgeografi Article in journal info:eu-repo/semantics/article text 2021 ftumeauniv https://doi.org/10.1016/j.ecolind.2021.108164 2023-09-22T14:01:22Z The Ob River floodplain is the second largest floodplain in the world. Despite its vast area, estimates of carbon (C) emissions from the Ob River floodplain are largely absent. Here we present seasonal C emission and water area extent from the main channel and the floodplain along a ~4 km reach in the boreal zone of the Ob River. We found strong seasonality in water area extent of the Ob main channel (~1.8 km2) and floodplain (~3 km2) with water covering 34% of land during flood and subsequently declining to ~16% and ~14% during summer and autumn baseflow, respectively. The C emissions also varied seasonally over the open water period, ranging from −0.1 to 0.6 g C m−2 d−1 for the Ob main channel and from 0 to 9 g C m−2 d−1 for the floodplain. The dissolved organic carbon positively affected CO2 concentrations and fluxes in the floodplain during all seasons, whereas pH and oxygen concentration negatively impacted CO2 concentrations and fluxes. Some nutrients (ammonia and phosphate) positively correlated with CO2 and CH4 concentrations in summer. The total C emission from the study reach (1.8 km2 main channel, 3 km2 floodplain) during moderate flooding was 236 ± 51 tons C yr−1 (>99% CO2, <1% CH4) with the floodplain accounting for ~65%. The contribution of the floodplain to the net river C evasion may be even greater during years of high flooding and in northern regions of the Ob River basin, where floodplain soils are more C-rich and are underlain by permafrost, and in years with more extensive flooding. Article in Journal/Newspaper ob river permafrost Umeå University: Publications (DiVA) Ecological Indicators 131 108164 |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
Carbon emission Floodplain Greenhouse gases Ob river Seasonal influences Physical Geography Naturgeografi |
spellingShingle |
Carbon emission Floodplain Greenhouse gases Ob river Seasonal influences Physical Geography Naturgeografi Krickov, Ivan V. Serikova, Svetlana Pokrovsky, Oleg S. Vorobyev, Sergey N. Lim, Artem G. Siewert, Matthias B. Karlsson, Jan Sizable carbon emission from the floodplain of Ob River |
topic_facet |
Carbon emission Floodplain Greenhouse gases Ob river Seasonal influences Physical Geography Naturgeografi |
description |
The Ob River floodplain is the second largest floodplain in the world. Despite its vast area, estimates of carbon (C) emissions from the Ob River floodplain are largely absent. Here we present seasonal C emission and water area extent from the main channel and the floodplain along a ~4 km reach in the boreal zone of the Ob River. We found strong seasonality in water area extent of the Ob main channel (~1.8 km2) and floodplain (~3 km2) with water covering 34% of land during flood and subsequently declining to ~16% and ~14% during summer and autumn baseflow, respectively. The C emissions also varied seasonally over the open water period, ranging from −0.1 to 0.6 g C m−2 d−1 for the Ob main channel and from 0 to 9 g C m−2 d−1 for the floodplain. The dissolved organic carbon positively affected CO2 concentrations and fluxes in the floodplain during all seasons, whereas pH and oxygen concentration negatively impacted CO2 concentrations and fluxes. Some nutrients (ammonia and phosphate) positively correlated with CO2 and CH4 concentrations in summer. The total C emission from the study reach (1.8 km2 main channel, 3 km2 floodplain) during moderate flooding was 236 ± 51 tons C yr−1 (>99% CO2, <1% CH4) with the floodplain accounting for ~65%. The contribution of the floodplain to the net river C evasion may be even greater during years of high flooding and in northern regions of the Ob River basin, where floodplain soils are more C-rich and are underlain by permafrost, and in years with more extensive flooding. |
format |
Article in Journal/Newspaper |
author |
Krickov, Ivan V. Serikova, Svetlana Pokrovsky, Oleg S. Vorobyev, Sergey N. Lim, Artem G. Siewert, Matthias B. Karlsson, Jan |
author_facet |
Krickov, Ivan V. Serikova, Svetlana Pokrovsky, Oleg S. Vorobyev, Sergey N. Lim, Artem G. Siewert, Matthias B. Karlsson, Jan |
author_sort |
Krickov, Ivan V. |
title |
Sizable carbon emission from the floodplain of Ob River |
title_short |
Sizable carbon emission from the floodplain of Ob River |
title_full |
Sizable carbon emission from the floodplain of Ob River |
title_fullStr |
Sizable carbon emission from the floodplain of Ob River |
title_full_unstemmed |
Sizable carbon emission from the floodplain of Ob River |
title_sort |
sizable carbon emission from the floodplain of ob river |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2021 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187287 https://doi.org/10.1016/j.ecolind.2021.108164 |
genre |
ob river permafrost |
genre_facet |
ob river permafrost |
op_relation |
Ecological Indicators, 1470-160X, 2021, 131, orcid:0000-0002-2319-8190 orcid:0000-0003-2890-8873 orcid:0000-0001-5730-0694 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187287 doi:10.1016/j.ecolind.2021.108164 ISI:000703760800005 Scopus 2-s2.0-85113933123 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.ecolind.2021.108164 |
container_title |
Ecological Indicators |
container_volume |
131 |
container_start_page |
108164 |
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1779318443337580544 |