Floodplain carbon dioxide emissions strongly exceed those of the main river stem: A case study of the Ob River, western Siberia - Sergey N. Vorobyev; Larisa G. Kolesnichenko; Yuri Kolesnichenko; Anatoly S. Prokushkin; Arina V. Lugovaya-Dolmatova; Jan Karlsson; Oleg S. Pokrovsky (Journal of Hydrology, 2024)