Atmospheric Dimethyl Sulfide and Sulfur Dioxide Measurements at Baring Head, New Zealand

大气中二甲基硫化物（DMS）和二氧化硫（SO2）的测量将在新西兰的Baring Head进行，使用一种新的同位素稀释GC/MS仪器。本项目的科学目标是建立南大洋海洋边界层SO2的预算。具体而言，大气DMS和SO2将在至少10个日周期内同时测量，DMS到SO2的转换效率将被确定，以及SO2在云、海盐气溶胶和海面上损失的相对幅度。现场数据将使用光化学箱模型进行解释。该项目的长期目标是研究大气的光化学状态与硫气体的氧化速率和途径之间的关系，并提高我们对硫气体前体与气溶胶产生和生长之间关系的理解。

Measurements of atmospheric dimethyl sulfide (DMS) and sulfur dioxide (SO2) will be made at Baring Head, New Zealand, using a new isotope dilution GC/MS instrument. The scientific goal of this project is to construct a budget for SO2 in the Southern Ocean marine boundary layer. Specifically, atmospheric DMS and SO2 will be measured simultaneously over at least ten diurnal cycles, the DMS to SO2 conversion efficiencies will be determined, as well as the relative magnitude of SO2 loss to clouds, sea salt aerosols and the sea surface. The field data will be interpreted using a photochemical box model. The long term objectives of this project are to investigate the relationship between the photochemical state of the atmosphere and the oxidation rates and pathways of sulfur gases and to improve our understanding of the relationship between sulfur gas precursors and the production and growth of aerosols.