A new paper on the fluxes and sources of CO2 outgassing from different floodplain deposits is out now. Sophia measured CO2 that is emitted from river channels, riverbank sediments and older floodplain deposits along the Rio Bermejo in Argentina. She found the highest fluxes occur away from the modern channel and riverbanks. Here, emissions are highly seasonal (highest fluxes during the wet season) and are influenced by the respiration of recent and old organic matter.
Based on her measurements, Sophie estimated that sediments and soils in the Rio Bermejo floodplains emit almost 450 tons of carbon per square kilometer and per year.
About: Dosch, S., Hovius, N., Bufe, A., Repasch, M., Scheingross, J., Vieth-Hillebrand, A., Sachse, D. (2025). CO2 Fluxes Driven by Floodplain Morphology and Seasonality at the Rio Bermejo, Argentina. Journal of Geophysical Research: Biogeosciences, 130(8), e2024JG008517. Journal Link