Distribution and emission of NO in the largest river-reservoir system along the Yellow River.

Rivers and reservoirs are affected by human activities and are sources of the greenhouse gas nitrous oxide (NO). Concentrations of NO in the middle and lower reaches of the Yellow River and Xiaolangdi Reservoir, China, were measured in June and December 2017. Fluxes were estimated by boundary layer method to explore their controlling factors, especially the impact of damming and reservoir operation.