Articles | Volume 12, issue 6
Biogeosciences, 12, 1799–1811, 2015
https://doi.org/10.5194/bg-12-1799-2015
Biogeosciences, 12, 1799–1811, 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 et al.

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Carole Helfter on behalf of the Authors (08 Jan 2015)  Author's response    Manuscript
ED: Reconsider after major revisions (19 Jan 2015) by Elise Pendall
AR by Carole Helfter on behalf of the Authors (26 Feb 2015)  Author's response    Manuscript
ED: Publish as is (02 Mar 2015) by Elise Pendall
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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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