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Article

Temperature Control of Spring CO2 Fluxes at a Coniferous Forest and a Peat Bog in Central Siberia

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Max Planck Institute for Biogeochemistry, Hans-Knöll-Street10, 07745 Jena, Germany
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Bioclimatology, Faculty of Forest Science and Forest Ecology, University of Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
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Centre of Biodiversity and Sustainable Land Use (CBL), University of Göttingen, Büsgenweg 1, 37077 Göttingen, Germany
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Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Sciences, University of Helsinki, P.O. Box 64, 00014 Helsinki, Finland
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Institute for Atmospheric and Earth System Research (INAR)/Forest Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Viikinkaari 1, 00014 Helsinki, Finland
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Yugra State University, 628012 Khanty-Mansiysk, Russia
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Climate Research Programme, Finnish Meteorological Institute, P.O. Box 503, 00101 Helsinki, Finland
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Vladimir Nikolayevich Sukachev Institute of Forest of the Siberian Branch of Russian Academy of Sciences, Separated Department of the KSC SB RAS, 660036 Krasnoyarsk, Russia
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School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Guoyi Zhou
Atmosphere 2021, 12(8), 984; https://doi.org/10.3390/atmos12080984
Received: 21 June 2021 / Revised: 19 July 2021 / Accepted: 24 July 2021 / Published: 30 July 2021
Climate change impacts the characteristics of the vegetation carbon-uptake process in the northern Eurasian terrestrial ecosystem. However, the currently available direct CO2 flux measurement datasets, particularly for central Siberia, are insufficient for understanding the current condition in the northern Eurasian carbon cycle. Here, we report daily and seasonal interannual variations in CO2 fluxes and associated abiotic factors measured using eddy covariance in a coniferous forest and a bog near Zotino, Krasnoyarsk Krai, Russia, for April to early June, 2013–2017. Despite the snow not being completely melted, both ecosystems became weak net CO2 sinks if the air temperature was warm enough for photosynthesis. The forest became a net CO2 sink 7–16 days earlier than the bog. After the surface soil temperature exceeded ~1 °C, the ecosystems became persistent net CO2 sinks. Net ecosystem productivity was highest in 2015 for both ecosystems because of the anomalously high air temperature in May compared with other years. Our findings demonstrate that long-term monitoring of flux measurements at the site level, particularly during winter and its transition to spring, is essential for understanding the responses of the northern Eurasian ecosystem to spring warming. View Full-Text
Keywords: spring; eddy covariance; CO2 flux; temperature; snowmelt; boreal forest; peatland; Siberia; carbon cycle; northern Eurasia spring; eddy covariance; CO2 flux; temperature; snowmelt; boreal forest; peatland; Siberia; carbon cycle; northern Eurasia
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MDPI and ACS Style

Park, S.-B.; Knohl, A.; Migliavacca, M.; Thum, T.; Vesala, T.; Peltola, O.; Mammarella, I.; Prokushkin, A.; Kolle, O.; Lavrič, J.; Park, S.S.; Heimann, M. Temperature Control of Spring CO2 Fluxes at a Coniferous Forest and a Peat Bog in Central Siberia. Atmosphere 2021, 12, 984. https://doi.org/10.3390/atmos12080984

AMA Style

Park S-B, Knohl A, Migliavacca M, Thum T, Vesala T, Peltola O, Mammarella I, Prokushkin A, Kolle O, Lavrič J, Park SS, Heimann M. Temperature Control of Spring CO2 Fluxes at a Coniferous Forest and a Peat Bog in Central Siberia. Atmosphere. 2021; 12(8):984. https://doi.org/10.3390/atmos12080984

Chicago/Turabian Style

Park, Sung-Bin, Alexander Knohl, Mirco Migliavacca, Tea Thum, Timo Vesala, Olli Peltola, Ivan Mammarella, Anatoly Prokushkin, Olaf Kolle, Jošt Lavrič, Sang Seo Park, and Martin Heimann. 2021. "Temperature Control of Spring CO2 Fluxes at a Coniferous Forest and a Peat Bog in Central Siberia" Atmosphere 12, no. 8: 984. https://doi.org/10.3390/atmos12080984

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