River cities global nit april 20192/1/2024 Anthropogenic perturbation of the carbon fluxes from land to ocean. Global agriculture and nitrous oxide emissions. Modeling nitrous oxide emission from rivers: a global assessment. Nitrous oxide emissions from inland waters: are IPCC estimates too high? Glob. Nitrogen inputs to rivers, estuaries and continental shelves and related nitrous oxide emissions in 19: a global model. Nitrous oxide emission from denitrification in stream and river networks. New estimates of global emissions of N 2O from rivers and estuaries. Global distribution of N 2O emissions from aquatic systems: natural emissions and anthropogenic effects. Inventories and scenarios of nitrous oxide emissions. The terrestrial biosphere as a net source of greenhouse gases to the atmosphere. in Climate Change 2013: The Physical Science Basis (eds Stocker, T. Nitrogen loads on headwater streams and groundwater from human activities, primarily agricultural nitrogen applications, play an important role in the increase of global riverine N 2O emissions.Ĭiais, P. The small rivers in headwater zones (lower than fourth-order streams) contributed up to 85% of global riverine N 2O emissions. The results show a fourfold increase of global riverine N 2O emissions from 70.4 ± 15.4 Gg N 2O-N yr −1 in 1900 to 291.3 ± 58.6 Gg N 2O-N yr −1 in 2016, although the N 2O emissions started to decline after the early 2000s. The model–data framework provides a quantification for how changes in nitrogen inputs (fertilizer, deposition and manure), climate and atmospheric CO 2 concentration, and terrestrial processes have affected the N 2O emissions from the world’s streams and rivers during 1900–2016. Here, we present an improved model representation of nitrogen and N 2O processes of the land–ocean aquatic continuum 11 constrained with an ensemble of 11 data products. This N 2O component was previously estimated as indirect emissions from agricultural soils 3 with large uncertainties 4, 5, 6, 7, 8, 9, 10. Emissions of nitrous oxide (N 2O) from the world’s river networks constitute a poorly constrained term in the global N 2O budget 1, 2.
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