Size-resolved isotope analysis reveals anthropogenic reactive nitrogen transport and transformation in Taiwan mountain forests: A case study

Lee, Wen-Chien; Huang, Ming-Hao; Huang, Wei-Chieh; Chen, Jen-Ping; Lai, Yen-Jen; Ren, Haojia; Hung, Hui-Ming

doi:10.5194/acp-26-10947-2026

Articles | Volume 26, issue 15

https://doi.org/10.5194/acp-26-10947-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-26-10947-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 15

Research article

|

06 Aug 2026

Research article |

| 06 Aug 2026

Size-resolved isotope analysis reveals anthropogenic reactive nitrogen transport and transformation in Taiwan mountain forests: A case study

Wen-Chien Lee, Ming-Hao Huang, Wei-Chieh Huang, Jen-Ping Chen, Yen-Jen Lai, Haojia Ren, and Hui-Ming Hung

Supplement

https://doi.org/10.5194/acp-26-10947-2026-supplement

Data sets

Size-resolved isotope analysis reveals anthropogenic reactive nitrogen transport and transformation in Taiwan mountain forests: A case study W.-C. Lee et al. https://doi.org/10.5281/zenodo.20787090

Model code and software

Analyzing mixing systems using a new generation of Bayesian tracer mixing models (https://brianstock.github.io/MixSIAR/) B. C. Stock et al. https://doi.org/10.7717/peerj.5096

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Short summary

We studied nitrogen pollution in Taiwan's mountain forests to track how urban emissions reach and transform in remote areas. Isotope analysis and statistical modeling revealed that combustion sources contributed 50–83 % of ammonia, while nitrate forms continuously from urban to rural sampling sites. The findings show that persistent urban pollution strongly impacts mountain ecosystems, offering key insights for air quality management.