Articles | Volume 21, issue 20
https://doi.org/10.5194/bg-21-4549-2024
https://doi.org/10.5194/bg-21-4549-2024
Research article
 | 
22 Oct 2024
Research article |  | 22 Oct 2024

Position-specific kinetic isotope effects for nitrous oxide: a new expansion of the Rayleigh model

Elise D. Rivett, Wenjuan Ma, Nathaniel E. Ostrom, and Eric L. Hegg

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This preprint is open for discussion and under review for Biogeosciences (BG).
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Cited articles

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Frame, C. H. and Casciotti, K. L.: Biogeochemical controls and isotopic signatures of nitrous oxide production by a marine ammonia-oxidizing bacterium, Biogeosciences, 7, 2695–2709, https://doi.org/10.5194/bg-7-2695-2010, 2010. 
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Many different processes produce nitrous oxide (N2O), a potent greenhouse gas. Measuring the ratio of heavy and light nitrogen isotopes (15N/14N) for the non-exchangeable central and outer N atoms of N2O helps to distinguish sources of N2O. To accurately calculate the position-specific isotopic preference, we developed an expansion of the widely used Rayleigh model. Application of our new model to simulated and experimental data demonstrates its improved accuracy for analyzing N2O synthesis.
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