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...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-11-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X21008293 |
| _version_ | 1818843799617536000 |
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| author | Ivan V. Krickov Svetlana Serikova Oleg S. Pokrovsky Sergey N. Vorobyev Artem G. Lim Matthias B. Siewert Jan Karlsson |
| author_facet | Ivan V. Krickov Svetlana Serikova Oleg S. Pokrovsky Sergey N. Vorobyev Artem G. Lim Matthias B. Siewert Jan Karlsson |
| author_sort | Ivan V. Krickov |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-19T05:03:37Z |
| format | Article |
| id | doaj.art-10f3c3374da8481d951da67e81f674d7 |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-12-19T05:03:37Z |
| publishDate | 2021-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-10f3c3374da8481d951da67e81f674d72022-12-21T20:35:01ZengElsevierEcological Indicators1470-160X2021-11-01131108164Sizable carbon emission from the floodplain of Ob RiverIvan V. Krickov0Svetlana Serikova1Oleg S. Pokrovsky2Sergey N. Vorobyev3Artem G. Lim4Matthias B. Siewert5Jan Karlsson6BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina 36, 634 050 Tomsk, RussiaClimate Impacts Research Centre (CIRC), Department of Ecology and Environmental Science, Umeå University, Linnaeus väg 6, 901 87 Umeå, Sweden; Swedish Geotechnical Institute, Olaus Magnus väg 35, 581 93 Linköping, SwedenGET UMR 5563 CNRS, Geoscience and Environment, University of Toulouse, 14 Avenue Edouard Belin, 31400 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, 163 000 Arkhangelsk, Russia; Corresponding author at: GET UMR 5563 CNRS, Geoscience and Environment, University of Toulouse, 14 Avenue Edouard Belin, 31400 Toulouse, France.BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina 36, 634 050 Tomsk, RussiaBIO-GEO-CLIM Laboratory, Tomsk State University, Lenina 36, 634 050 Tomsk, RussiaClimate Impacts Research Centre (CIRC), Department of Ecology and Environmental Science, Umeå University, Linnaeus väg 6, 901 87 Umeå, SwedenClimate Impacts Research Centre (CIRC), Department of Ecology and Environmental Science, Umeå University, Linnaeus väg 6, 901 87 Umeå, SwedenThe 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.http://www.sciencedirect.com/science/article/pii/S1470160X21008293FloodplainGreenhouse gasesOb riverSeasonal influencesCarbon emission |
| spellingShingle | Ivan V. Krickov Svetlana Serikova Oleg S. Pokrovsky Sergey N. Vorobyev Artem G. Lim Matthias B. Siewert Jan Karlsson Sizable carbon emission from the floodplain of Ob River Ecological Indicators Floodplain Greenhouse gases Ob river Seasonal influences Carbon emission |
| title | 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_short | Sizable carbon emission from the floodplain of Ob River |
| title_sort | sizable carbon emission from the floodplain of ob river |
| topic | Floodplain Greenhouse gases Ob river Seasonal influences Carbon emission |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X21008293 |
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