Hydrometeorological sensitivities of net ecosystem carbon dioxide and methane exchange of an Amazonian palm swamp peatland

•Rare eddy covariance flux measurements of CO2 and CH4 in a palm swamp peatland in the Peruvian Amazon.•The peatland was a large CO2 sink and a CH4 source.•Photosynthetic activity was inhibited and respiration enhanced during warm-dry conditions.•Carbon cycling in Amazonian palm swamp forests are sensitive to hydrometeorological forcings.•Longer-term measurements are needed to assess their potential vulnerability to climate change.