Revealing underestimated ship contributions to atmospheric nitrate over the Pearl River Delta: Based on dual isotopes.
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PubMed
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| Autori principali: | , , , , , , |
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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Journal of hazardous materials
2025
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| _version_ | 1868266130303352832 |
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| author | Chen, Tian-Shu Xiao, Hong-Wei Tao, Jun-Liang Xiao, Hao Yin, Mei-Ju Xu, Yu Xiao, Hua-Yun |
| author_facet | Chen, Tian-Shu Xiao, Hong-Wei Tao, Jun-Liang Xiao, Hao Yin, Mei-Ju Xu, Yu Xiao, Hua-Yun Chen, Tian-Shu Xiao, Hong-Wei Tao, Jun-Liang Xiao, Hao Yin, Mei-Ju Xu, Yu Xiao, Hua-Yun |
| collection | PubMed - marine biology |
| contents | Revealing underestimated ship contributions to atmospheric nitrate over the Pearl River Delta: Based on dual isotopes. Chen, Tian-Shu Xiao, Hong-Wei Tao, Jun-Liang Xiao, Hao Yin, Mei-Ju Xu, Yu Xiao, Hua-Yun Nitrate (NO), as a major inorganic component of fine particulate matter (PM) in coastal cities, poses serious threats to human health, and its deposition also exerts important impacts on marine ecosystems. In port cities, ship emissions are a dominant factor of atmospheric NO pollution, yet in the Pearl River Delta (PRD), one of the world's busiest ports, their contribution remains poorly quantified despite its critical implications for coastal air quality management. In this study, we present year-round dual isotopes (δN and δO) of NO in Guangzhou, a coastal megacity over the PRD. Bayesian isotope mixing model (MixSIAR) reveals that ship emissions contributed 45.0 ± 1.5 % of atmospheric NO annually in the PRD, closely matching traffic sources (46.6 ± 1.3 %) and far exceeding coal combustion (8.4 ± 0.2 %). The results were further validated by satellite data and emission inventory, confirming the sustained contribution of ship emissions. |
| format | Artículo científico |
| id | pubmed_41192171 |
| institution | PubMed |
| language | en |
| publishDate | 2025 |
| publisher | Journal of hazardous materials |
| record_format | pubmed |
| spellingShingle | Revealing underestimated ship contributions to atmospheric nitrate over the Pearl River Delta: Based on dual isotopes. Chen, Tian-Shu Xiao, Hong-Wei Tao, Jun-Liang Xiao, Hao Yin, Mei-Ju Xu, Yu Xiao, Hua-Yun Revealing underestimated ship contributions to atmospheric nitrate over the Pearl River Delta: Based on dual isotopes. Chen, Tian-Shu Xiao, Hong-Wei Tao, Jun-Liang Xiao, Hao Yin, Mei-Ju Xu, Yu Xiao, Hua-Yun Nitrate (NO), as a major inorganic component of fine particulate matter (PM) in coastal cities, poses serious threats to human health, and its deposition also exerts important impacts on marine ecosystems. In port cities, ship emissions are a dominant factor of atmospheric NO pollution, yet in the Pearl River Delta (PRD), one of the world's busiest ports, their contribution remains poorly quantified despite its critical implications for coastal air quality management. In this study, we present year-round dual isotopes (δN and δO) of NO in Guangzhou, a coastal megacity over the PRD. Bayesian isotope mixing model (MixSIAR) reveals that ship emissions contributed 45.0 ± 1.5 % of atmospheric NO annually in the PRD, closely matching traffic sources (46.6 ± 1.3 %) and far exceeding coal combustion (8.4 ± 0.2 %). The results were further validated by satellite data and emission inventory, confirming the sustained contribution of ship emissions. |
| title | Revealing underestimated ship contributions to atmospheric nitrate over the Pearl River Delta: Based on dual isotopes. |
| url | https://pubmed.ncbi.nlm.nih.gov/41192171/ |