Summary
Abstract Drained peatlands are a significant source of greenhouse gas (GHG) emissions; however, research has predominantly focused on terrestrial areas, with much less attention given to drainage ditches. Despite their small surface area, ditches can substantially affect the peatland GHG balance owing to conditions that favour GHG production. We conducted monthly field campaigns in five ditches across two agricultural polders in the Netherlands using floating chambers to measure daytime diffusive emissions of carbon dioxide (CO 2 ), diffusive and ebullitive methane (CH 4 ), and nitrous oxide (N 2 O), and bubble traps to measure CH 4 ebullition. We compared ditch emissions to landscape-scale emissions obtained via eddy covariance (EC) and automated terrestrial chamber measurements during th
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