Volatile Sulfur Compounds : Ocean Fluxes and Reaction Processes in the Atmosphere

本研究的目的是阐明硫的全球循环过程。在三个地点进行了基于地面的观测，三个地点是三川湾、名古屋市和若狭湾。与庆应义塾大学合作，在三川的Sakusima观测站同时观测了NOx、臭氧和气象因素。本文还进行了飞机实验，用气相色谱法同时测定了多种硫化物在大气中的迁移和反应过程，结果表明，该方法适用于研究海洋、陆地等不同来源的硫化物的复杂迁移和反应过程，我们在二甲基硫醚（DMS）的垂直剖面上发现了一个非常有趣的案例。与以前的报告相比，在较高的海拔高度（4公里）观察到更高的DMS浓度，与2公里相比。通过对气溶胶浓度和气象要素的分析，总结出气溶胶和气体化合物从海平面到对流层的快速输送过程，除了垂直扩散和水平流动外，还存在一个垂直输送过程。这一过程似乎在挥发性硫化物的全球循环中非常重要。

The purpose of this research is to clarify the global circulation process of sulfur. The gound based observation were practiced at three sites, Mikawa bay, Nagoya city, and Wakasa bay. In cooperation with Keio University, simultaneous observations of NOx, ozone, and meteorological factor were carried out at Sakusima Observatory, in Mikawa day. Additionally, aircraft experiment were also carried out.We have measured many kinds of sulfur compounds simultaneously by the gas chromatography method, in order to clarify the transport and reaction process of them in the atmosphere.It became clear that the method is good for investigation of complex processes of transport and reaction including different origin compounds, for example, marin, land, and human work.We found the very interesting case on the vertical profile of dimethylsulfide (DMS). Higher concentration of DMS at higher altitude (4 km), comparing with that for 2 km, was observed, against previous reports. The analyzes on the aerosol mesurements and meteorological factors were investigated for that case.Summarlizing the research, it can be concluded that there is one rapid transport process for aerosols and gas compounds from sea level to free troposphere by vertical purtabation in addition to vertical diffusion and horizontal flow. This process seems to be very impotant in the global circulation of volatile sulfur compounds.