Winter dynamics of the greenhouse gas exchange in a natural bog

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Northern peatlands are important in the context of the climate change. Since they comprise huge amounts of soil organic carbon and are found where the most significant greenhouse warming is predicted, they have the potential to exert major feedback effects on the global warming. In this study, fluxes of CO2, CH4 and N2O in a natural, nutrient-poor peatland (ombrotrophic bog) in southern Sweden were measured from February to April using a closed chamber technique. The conclusion was that winter processes are important, and should be taken into consideration in global greenhouse gas budgets. Temperature and freeze-thaw cycles are important factors regulating winter dynamics. The temperature sensitivity of the mire ecosystem is high at these low temperatur...