Articles | Volume 14, issue 8
Geosci. Model Dev., 14, 5001–5022, 2021
https://doi.org/10.5194/gmd-14-5001-2021
Geosci. Model Dev., 14, 5001–5022, 2021
https://doi.org/10.5194/gmd-14-5001-2021

Model description paper 12 Aug 2021

Model description paper | 12 Aug 2021

iNRACM: incorporating 15N into the Regional Atmospheric Chemistry Mechanism (RACM) for assessing the role photochemistry plays in controlling the isotopic composition of NOx, NOy, and atmospheric nitrate

Huan Fang et al.

Model code and software

iNRACM: Incorporating 15N into the Regional Atmospheric Chemistry Mechanism (RACM) for assessing the role photochemistry plays in controlling the isotopic composition of NOx, NOy, and atmospheric nitrate (Version 1.0) Huan Fang https://doi.org/10.5281/zenodo.3834921

SboxN15 Huan Fang https://mygeohub.org/tools/sbox/

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Short summary
A new photochemical reaction scheme that incorporates nitrogen isotopes has been developed to simulate isotope tracers in air pollution. The model contains 16 N compounds, and 96 reactions involving N used in the Regional Atmospheric Chemistry Mechanism (RACM) were replicated using 15N in a new mechanism called iNRACM. The model is able to predict d15N variations in NOx, HONO, and HNO3 that are similar to those observed in aerosol and gases in the troposphere.