海洋表層水中における硫化ジメチルの生成・消費過程に関する研究の発展

抄録

An organic sulfur gas, dimethylsulfide (DMS) plays potential roles in atmospheric chemistry and hence Earth’s climate regulation. DMS is produced in marine environments via biogeochemical processes and a part of the DMS is emitted from the ocean to the atmosphere at a rate of 15–40 TgS yr-¹. After CLAW hypothesis proposed, investigators have confirmed whether the cooling effect can control on-going global warming, and it has been concluded that the global contribution is too small to regulate the global warming. However, recent studies pointed out the local-scale effect of CLAW feedback especially in remote area from anthropogenic activities. Furthermore, over 35 years after the CLAW hypothesis, related research fields and techniques have been improved drastically. In this review, I describe the DMS-related sulfur cycle in surface ocean and overview the recent DMS research progresses and the future perspectives.