Preliminary study on the distribution of nutrients, organic matter, trace metals in sea surface microlayer in Xiamen Bay and Jiulong Estuary

The enrichment of nutrients (NO₂^-, NO₃^-, PO₄^3-), suspended particles, organic matter (POC, PON,DOC), and trace metals (Cu, Ni, Cd) was determined in the sea surface microlayer of Xiamen Bay and Jiulong Estuary.The mean enrichment factors ([Xi]_microlayer/[Xi]_{15cm in depth}) mostly ranged between 1.0 and 2.0.The dissolved forms were the major forms of the components measured, the enrichment of dissolved organic matter and suspended particles could lead to the changes in the total amount and speciation of nutrients and trace metals.No correlation was observed between sample concentrations, speciation, enrichment factors and sample locations.However, some evidence shows that these parameters are correlated with sea state, indicating the complexity and dynamic nature of the sea surface microlayer.