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

含硫气体是全球硫循环的重要组成部分。 它们增加了降水的酸度， 全球辐射平衡和气候。 地球的作用 生物硫的来源及其对大气化学的影响 仍然是我们理解的主要悬而未决的问题， 自然循环 这些研究人员的初步研究 这表明，北方泥炭地的植被区主要由 泥炭藓释放出大量的二甲基硫（DMS） 相对于其他湿地，这些湿地的变化 在气候变化期间， S循环。 本研究将测量DMS的排放速率 来确定这些栖息地的重要性， 气体S的来源，将解决季节性影响， 水文变化对二甲基硫醚排放的影响， 微生物在湿地中形成和消耗DMS。

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.