Temperature Control of Spring CO2 Fluxes at a Coniferous Forest and a Peat Bog in Central Siberia
Open Access
- 30 July 2021
- journal article
- research article
- Published by MDPI AG in Atmosphere
- Vol. 12 (8), 984
- https://doi.org/10.3390/atmos12080984
Abstract
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.Funding Information
- National Research Foundation of Korea (NRF-2020R1C1C1013628)
- International Science and Technology Center (2757)
This publication has 67 references indexed in Scilit:
- Persistent carbon sink at a boreal drained bog forestBiogeosciences (online), 2018
- Carbon dynamics in boreal peatlands of the Yenisey region, western SiberiaBiogeosciences (online), 2015
- An estimate of the terrestrial carbon budget of Russia using inventory-based, eddy covariance and inversion methodsBiogeosciences (online), 2012
- Influence of stand age on the magnitude and seasonality of carbon fluxes in Canadian forestsAgricultural and Forest Meteorology, 2012
- Northern peatland carbon stocks and dynamics: a reviewBiogeosciences (online), 2012
- A Large and Persistent Carbon Sink in the World’s ForestsScience, 2011
- CO2 balance of boreal, temperate, and tropical forests derived from a global databaseGlobal Change Biology, 2007
- Trends in high northern latitude soil freeze and thaw cycles from 1988 to 2002Journal of Geophysical Research: Atmospheres, 2004
- Long‐term measurements of boreal forest carbon balance reveal large temperature sensitivityGlobal Change Biology, 1998
- Northern Peatlands: Role in the Carbon Cycle and Probable Responses to Climatic WarmingEcological Applications, 1991