Northern peatlands have been accumulating organic matter since the start of the Holocene, and are now a substantial store of terrestrial carbon. However, their current status as carbon sinks is less clear, because of the possible effects of climate change, air pollution, grazing and drainage etc., and the difficulties of accurate measurement with suitable time resolution. Such measurements are particularly lacking in the UK. Here, we present multi-year eddy covariance measurements of the carbon fluxes at a relatively undisturbed ombrotrophic blanket bog in the Flow Country of northern Scotland.

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