Fluxes of nitrous oxide and methane in different coastal Suaeda salsa marshes of the Yellow River estuary, China

► Fluxes of N2O and CH4 in coastal marsh had different spatial and temporal variations. ► Coastal marsh represented N2O emission and CH4 sink during sampling campaigns. ► N2O comprised the principal part of total CO2-e emissions during spring and winter. ► Contributions of CH4 to total CO2-e could not be ignored during summer and autumn.