<b>Responses of biogenic active gases to the atmospheric deposition </b><b>with acid-processed in the oligotrophic western Pacific Ocean</b>

Dimethylsulfide (DMS) and very short-lived bromocarbons (VSL^Br) are important trace gases emitted from oceans that can affect global climate. The deck incubation experiment was conducted to explore the impacts of atmospheric aerosol deposition and acid-processed aerosol deposition in determining production of DMS, and four VSL^Br including bromoform (CHBr₃), dibromomethane (CH₂Br₂), dibromochloromethane (CHBr₂Cl), and bromodichloromethane (CHBrCl₂) in the oligotrophic western Pacific Ocean. The experiment revealed that atmospheric aerosol deposition significantly elevated DMS and four VSL^Brvalues. Furthermore, introducing aerosols led to a rise in the abundance of high DMS producers, specifically dinoflagellates. In comparison, the acid aerosol treatment had a more pronounced effect on Chlorophyll <i>a</i> (Chl-<i>a</i>) and DMS. However, the responses of VSL^Br to the acid aerosol treatment were more complex. While the average CHBr₃ and CH₂Br₂ values showed no significant variations between aerosol and acid aerosol treatments, the production of CHBr₂Cl and CHBrCl₂ was inhibited in the acid aerosol treatment.