Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
doi:10.5194/acp-2017-43
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
10 Feb 2017
Review status
This discussion paper is under review for the journal Atmospheric Chemistry and Physics (ACP).
Net ecosystem exchange and energy fluxes in a West Siberian bog
Pavel Alekseychik1, Ivan Mammarella1, Dmitry Karpov2, Sigrid Dengel6, Irina Terentieva3, Aleksander Sabrekov2,3, Mikhail Glagolev2,3,4,5, and Elena Lapshina2 1Department of Physics, P.O. Box 68 , FI-00014, University of Helsinki, Finland
2Department of Environmental dynamics and global climate change, 628012, Yugra State University, Russia
3Tomsk State University, Russia
4Department of Soil Physics and Development, 119991, Moscow State University, Russia
5Institute of Forest Science, Russian Academy of Sciences, 143030, Moscow, Russia
6Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, USA
Abstract. Very few studies of ecosystem-atmosphere exchange involving eddy-covariance data have been conducted in Siberia, and none in West Siberia. This work provides the first estimates of carbon dioxide (CO2) and energy budgets at a typical bog of the West Siberian middle taiga based on May-August measurements in 2015. The footprint of measured fluxes consisted of homogeneous mixture of tree-covered ridges and hollows with the vegetation represented by typical sedges and shrubs. Generally, the surface exchange rates resembled those of pine-covered bogs elsewhere. The surface energy balance closure was 90 %. Net CO2 uptake was comparatively high, summing up to 196 gC m−2 for the four measurement months, while the Bowen ratio was typical at 30 %. The ecosystem turned into a net CO2 source during several front passage events in June and July. Several periods of heavy rain helped keep the water table at a constant level, preventing a usual drawdown in summer. However, because of the cloudy and rainy weather, the observed fluxes might rather represent the special weather conditions of 2015 than their typical level.

Citation: Alekseychik, P., Mammarella, I., Karpov, D., Dengel, S., Terentieva, I., Sabrekov, A., Glagolev, M., and Lapshina, E.: Net ecosystem exchange and energy fluxes in a West Siberian bog, Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2017-43, in review, 2017.
Pavel Alekseychik et al.
Pavel Alekseychik et al.
Pavel Alekseychik et al.

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Short summary
West Siberian peatlands occupy a large fraction of land area in the region, and yet little is known about their interactions with the atmosphere. We have made the first measurements of CO2 and energy surface balances over a typical bog of west Siberian middle taiga, in the vicinity of the Mukhrino Field Station (Khanty-Mansiysk). The May-August study in a wet year (2015) revealed relatively high photosynthetic sink of CO2 that was close to the high end of estimates at bog sites elsewhere.
West Siberian peatlands occupy a large fraction of land area in the region, and yet little is...
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