海洋表層から大気への反応性窒素の放出と生物地球化学

抄録

Reactive nitrogen (oxidized and reduced inorganic and organic forms of nitrogen),produced and emitted into the atmosphere during biogeochemical cycles in the ocean surface, plays a key role in atmospheric chemical and physical processes over the ocean. Understanding the oceanic emissions of reactive nitrogen is crucial to quantify the net flux of reactive nitrogen between the atmosphere and ocean including the atmospheric deposition, and to predict the subsequent influence of the flux on ocean biogeochemistry and climate. This paper reviews our understanding of the atmospheric emissions of reactive nitrogen from the ocean, with a focus on ammonia/ammonium, organic nitrogen, and nitric acid. The review places particular focus on the relevance to marine microbial activity to investigate the biogeochemical cycle of reactive nitrogen in the surface ocean–lower atmosphere and its possible changes in future.