Collaborative Research: Sphagnum-dominated Wetlands as Sources of Atmospheric Dimethyl Sulfide

硫气体是全球s循环的重要组成部分，它们对降水的酸性有贡献，并影响全球辐射平衡和气候。陆地生物源S的作用及其对大气化学的影响仍然是我们理解自然S循环的主要未解问题。这些研究人员的初步研究表明，相对于其他湿地，以泥炭藓为主的北部泥炭地植被区释放出大量的二甲基硫化物（DMS），并且这些湿地在气候变化过程中的变化可能影响高纬度大气S循环。本研究将测量湿地DMS的排放率，以确定这些栖息地作为气态S源的重要性，将解决季节性影响，水文变化在影响DMS排放中的作用，以及湿地中DMS的微生物形成和消耗。

Sulfur gases are important components of the global cycle of S. They contribute to the acidity of precipitation and they influence global radiation balance and climate. The role of terrestrial sources of biogenic S and their effect on atmospheric chemistry remain as major unanswered questions in our understanding of the natural S cycle. Preliminary studies by these investigators suggest that vegetated areas of northern peatlands dominated by Sphagnum mosses emit large quantities of dimethyl sulfide (DMS) relative to other wetlands, and that changes in these wetlands during climatic changes could affect the high latitude atmospheric S cycle. This study will measure the rates of emission of DMS from wetlands to determine the importance of these habitats as sources of gaseous S, will address seasonal effects, the role of hydrological changes in affecting DMS emissions, and the microbiological formation and consumption of DMS in wetlands.