Carbon Dioxide Emissions from Freshwater Systems in Western Siberia

Abstract

One of the possible sources of carbon dioxide emission into the atmosphere can be river ecosystems. The paper presents the results of measuring CO₂ fluxes from the surface of several rivers and lakes in Tomsk Region. In the experimental period, average carbon dioxide fluxes were 143.7 ± 21.7 (August 13–14, 2023), 53.3 ± 21.2 (August 19), and 80.4 ± 59.9 mgC m⁻² h⁻¹ for the Ob River; 66.1 ± 17.3 mgC m⁻² h⁻¹ for the Ket River; 33.3 ± 17.3 mgC m⁻² h⁻¹ for the swamp Karasevoye Lake, 50.2 ± 23.0 mgC m⁻² h⁻¹ for the Suiga River, and 81.9 ± 11.5 mgC m⁻² h⁻¹ for the Iksa River. The flux magnitudes significantly depended not only on the object of the study, but also on hydrometeorological conditions.