The flux of methane ( CH 4 ) from inland waters to the atmosphere has a profound impact on global atmospheric greenhouse gas ( GHG ) levels, and yet, strikingly little is known about the dynamics controlling sources and sinks of CH 4 in the aquatic setting. Here, we examine the cycling and flux of CH 4 in six large rivers in the A mazon basin, including the A mazon R iver. Based on stable isotopic mass balances of CH 4 , input...

Methane ( CH 4 ) fluxes from world rivers are still poorly constrained, with measurements restricted mainly to temperate climates. Additional river flux measurements, including spatio‐temporal studies, are important to refine extrapolations. Here we assess the spatio‐temporal variability of CH 4 fluxes from the Amazon and its main tributaries, the Negro, Solimões, Madeira, Tapajós, Xingu, and Pará Rivers, based on direct measu...