The Xiamen Symposium on Marine Environmental Sciences (XMAS 2025)

In this report, we compared the atmospheric reactive nitrogen (NO3-, NH4+ and WSON) dry deposition fluxes over China Seas (including South China sea (SCS), East China sea, Yellow sea and Bohai Sea (ECSs)) from 2000s to 2020s.  The dry deposition fluxes of NO3- and WSON displayed increased pattern from 2000s to 2010s in ECSs, while there were no ten years differences for NH4+ dry deposition fluxes. In SCS, the dry deposition fluxes of NO3-, NH4+ and WSON displayed decreased trends. In addition, the dry deposition fluxes in coastal cities were obviously higher than those in island and cruise samples in both SCS and ECSs. We also measured the wet deposition fluxes of NO3-, NH4+ and WSON in SCS, and will be used to estimate ratios of dry to wet deposition fluxes, and further to calculated the total reactive nitrogen deposition fluxes.

observation datasets, China marginal seas, nitrogen deposition fluxes