Articles | Volume 12, issue 6
https://doi.org/10.5194/bg-12-1799-2015
https://doi.org/10.5194/bg-12-1799-2015
Research article
 | 
18 Mar 2015
Research article |  | 18 Mar 2015

Drivers of long-term variability in CO2 net ecosystem exchange in a temperate peatland

C. Helfter, C. Campbell, K. J. Dinsmore, J. Drewer, M. Coyle, M. Anderson, U. Skiba, E. Nemitz, M. F. Billett, and M. A. Sutton

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Short summary
The CO2 sink strength of a temperate peatland in SE Scotland exhibited large inter-annual variability which was well-correlated to the length of the growing season. Mean winter air temperature explained 87% of the inter-annual variability in the sink strength of the following summer, indicating a phenological memory effect. Autotrophic respiration is thought to be dominant, but heterotrophic processes might have been enhanced during dry spells increasing the loss of CO2 to the atmosphere.
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