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Indirect nitrous oxide emissions from streams within the US Corn Belt scale with stream order
- Turner, Peter A., Griffis, Timothy J., Lee, Xuhui, Baker, John M., Venterea, Rodney T., Wood, Jeffrey D.
- Proceedings of the National Academy of Sciences of the United States of America 2015 v.112 no.32 pp. 9839-9843
- climate change, emissions factor, greenhouse gas emissions, greenhouse gases, nitrous oxide, streams, Corn Belt region, Minnesota
- Significance N ₂O emissions from riverine systems are poorly constrained, giving rise to highly uncertain indirect emission factors that are used in bottom-up inventories. Using a non–steady-state flow-through chamber system, N ₂O fluxes were measured across a stream order gradient within the US Corn Belt. The results show that N ₂O emissions scale with the Strahler stream order. This information was used to estimate riverine emissions at the local and regional scales and demonstrates that previous bottom-up inventories based on the Intergovernmental Panel on Climate Change default values have significantly underestimated these indirect emissions.