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- W2003284471 startingPage "e0118954" @default.
- W2003284471 abstract "Rising concentrations of nitrous oxide (N2O) in the atmosphere are causing widespread concern because this trace gas plays a key role in the destruction of stratospheric ozone and it is a strong greenhouse gas. The successful mitigation of N2O emissions requires a solid understanding of the relative importance of all N2O sources and sinks. Stable isotope ratio measurements (δ15N-N2O and δ18O-N2O), including the intramolecular distribution of 15N (site preference), are one way to track different sources if they are isotopically distinct. ‘Top-down’ isotope mass-balance studies have had limited success balancing the global N2O budget thus far because the isotopic signatures of soil, freshwater, and marine sources are poorly constrained and a comprehensive analysis of global N2O stable isotope measurements has not been done. Here we used a robust analysis of all available in situ measurements to define key global N2O sources. We showed that the marine source is isotopically distinct from soil and freshwater N2O (the continental source). Further, the global average source (sum of all natural and anthropogenic sources) is largely controlled by soils and freshwaters. These findings substantiate past modelling studies that relied on several assumptions about the global N2O cycle. Finally, a two-box-model and a Bayesian isotope mixing model revealed marine and continental N2O sources have relative contributions of 24–26% and 74–76% to the total, respectively. Further, the Bayesian modeling exercise indicated the N2O flux from freshwaters may be much larger than currently thought." @default.
- W2003284471 created "2016-06-24" @default.
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- W2003284471 creator A5041413118 @default.
- W2003284471 creator A5067092655 @default.
- W2003284471 creator A5077902412 @default.
- W2003284471 date "2015-03-26" @default.
- W2003284471 modified "2023-09-30" @default.
- W2003284471 title "From the Ground Up: Global Nitrous Oxide Sources are Constrained by Stable Isotope Values" @default.
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- W2003284471 doi "https://doi.org/10.1371/journal.pone.0118954" @default.
- W2003284471 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4374930" @default.
- W2003284471 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25811179" @default.
- W2003284471 hasPublicationYear "2015" @default.
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