[A-OS23] [JJ] Chemical Oceanography

[AOS23-P03] Stable nitrogen isotopic composition (δ¹⁵N) of dissolved organic nitrogen (DON) in the South China Sea

*Run Zhang¹ (1.Xiamen University)

Keywords:South China Sea, δ15N, DON

Dissolved organic nitrogen (DON) represents an essential N pool, and its stable isotopic composition (δ¹⁵N) may provide unique insights into marine N cycle. However, few results of DON δ¹⁵N have been reported to date in the global ocean. In this study, we will report DON δ¹⁵N values in the upper layer waters of the South China Sea (SCS), which is the largest marginal sea west of the Pacific Ocean.