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

Fumikazu Taketani1, Maki Noguchi Aita2, Kazuyo Yamaji3, Takashi Sekiya4, Kohei Ikeda5, Kosei Sasaoka6, Makio C Honda7, Kazuhiko Matsumoto8 and Yugo Kanaya1, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Research Institute for Global Change, Yokohama, Japan, (2)Japan Agency for Marine-Earth Science and Technology, Research Institute for Global Change, Yokosuka, Japan, (3)KOBE UNIVERSITY, Graduate School of Maritime Sciences, Kobe, Japan, (4)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Research Institute for Global Change, Kanagawa, Japan, (5)NIES National Institute of Environmental Studies, Ibaraki, Japan, (6)JAMSTEC, Yokosuka, Japan, (7)JAMSTEC, Kanagawa, Japan, (8)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Research Institute for Global Change, Yokosuka, Japan
Abstract:
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.