Biological Production And Consumption Rates In The Yellow Sea, South China Sea Dms

DMS is the most abundant volatile sulfur compounds in the surface ocean. It has a great influence on the global climate change and the formation of acid rain. The biological production and consumption are considered to be the principal mechanisms controlling the concentration of DMS in the oceanic surface, and play a key role in the global biogeochemical cycle of sulfur. In this dissertation we develop the analysis methods of DMS and research the biological production and consumption rates of DMS in the Yellow Sea, the South China Sea and Qingdao coastal sea. Some important conclusions are drawn as follows:ⅰ.Development of DMS and DMSP analysis methodsThe gas-stripping chromatographic methods equipped with a flame photometric detector has been developed for the determination of the DMS with a high precisions of <5%, and a low detection limit of 0.15 ng S. The recovery rate of DMS in seawater is higher than 85.6%.ⅱ.Study on the biological production and consumption rates of DMS in the Yellow sea and the factors influencing themThe production rates of DMS in the subsurface water ranged from 0.98 to 17.14 nM d-1 with an average of 5.78 nM d^-1. In contrast, the production rates of DMS in the surface microlayer varied from 0.97 to 18.29 nM d^-1 with an average...