Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 20
Articles | Volume 26, issue 20
https://doi.org/10.5194/acp-26-15273-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-15273-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 20
Research article
 | 
29 Oct 2026
Research article |  | 29 Oct 2026

Comparative nitrogen speciation in marine and coastal urban aerosols of the Greater Bay Area and implications for PM2.5-bound nitrogen deposition

Cong Cao, Wei Chen, Xu Yu, Wing Hei Marco Wong, Ningning Sun, Kun Zhang, Weicong Cheng, Jianping Gan, and Jian Zhen Yu

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Short summary

Coastal waters receive nitrogen from the air, but its chemical forms are poorly understood. We sampled airborne particles during a cruise in the Guangdong–Hong Kong–Macau Greater Bay Area and at an urban site in Hong Kong. Nitrogen chemistry differed between urban and marine air, and carbon-containing nitrogen declined offshore. Fine particles supplied nitrogen to coastal waters, highlighting the need to consider its chemical form when assessing nutrient inputs and potential ecosystem effects.

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