Model file associated with Thuss SJ, Venkiteswaran JJ, and Schiff SL. 2014. Proper interpretation of dissolved nitrous oxide isotopes, production pathways, and emissions requires a modelling approach. PLoS ONE 9(3): e90641. doi: 10.1371/journal.pone.0090641.
In this manuscript, we present a dynamic model of the stable isotopic composition of both the dissolved and emitted N2O in aqueous systems. We apply this model to two different measured diel patterns of the isotopic ratios of N2O in an aquatic ecosystem. We use the model to elucidate the relationship between the isotopic ratios of source, dissolved, and emitted N2O, to allow for improved interpretation of dissolved N2O isotope data. Ultimately, a process-based understanding on N cycling with aquatic ecosystems may be developed based on interpretation of N cycling processes.
The STM file was created with Stella (version 9.1.4 http://www.iseesystems.com) to perform the analyses described in this manuscript.