Articles | Volume 25, issue 19
https://doi.org/10.5194/acp-25-12451-2025
https://doi.org/10.5194/acp-25-12451-2025
Research article
 | 
09 Oct 2025
Research article |  | 09 Oct 2025

The critical role of volatile organic compound emissions in nitrate formation in Lhasa, Tibetan Plateau: insights from oxygen isotope anomaly measurements

Xueqin Zheng, Junwen Liu, Nima Chuduo, Bian Ba, Pengfei Yu, Phu Drolgar, Fang Cao, and Yanlin Zhang

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Short summary
In this study, we present the first report on the annual variation of stable oxygen isotope anomalies in nitrate (NO3) collected from the urban area of Lhasa, on the Tibetan Plateau, China. Using a Bayesian isotope mixture model, we found that the relative contribution of the NO3 + volatile organic compound (VOC) pathway to NO3 formation in spring in Lhasa was several times higher than that in urban cities, highlighting the significant influence of VOCs transported from outside the Tibetan Plateau.
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