Potentials of Deposition of Atmospheric Inorganic Nitrogen Compounds to the Surface Marine Ecosystem at Sea of Japan

The contribution to the surface marine ecosystem at Sea of Japan by the deposition of atmospheric inorganic nitrogen compounds were investigated using 3-Dimensinal marine ecosystem model (COCO-NEMURO) combined with atmospheric regional chemical transport model (WRF-CMAQ) in this study. The monthly mean data of wet and dry deposition data of inorganic nitrogen compounds consisted of gases (HNO₃ and NH₃) and aerosol particles (NO₃^- and NH₄⁺) at Sea of Japan in 2009 – 2016 produced by WRF-CMAQ were inputted to the COCO-NEMURO as a new nitrogen nutrients supplying process from the atmosphere. It was indicated that the surface chlorophyll mass concentration were significantly increased at summertime. It was suggested that the supplying of the atmospheric inorganic nitrogen compounds would lead to the potentially high perturbation to the marine ecosystem at Sea of Japan. In the presentation, we are going to discuss the potentials of atmospheric inorganic nitrogen deposition at different location (North/South of Sea of Japan) and the comparison of satellite observation.