Sea-Salt Aqueous-Phase Ozone Oxidation of Sulfur Dioxide and its Contribution to MBL Sulfur Budgets: ACE-1 Measurements Analysis and Interpretation

小行星9419418 这个项目是南半球海洋浮质特性试验的一部分，该试验将于1995年在遥远的南太平洋进行，利用飞机、船上和地面测量各种化学物质、物理和气象参数，其中心目标是调查大气浮质的形成、演变和光学特性。在这一部分中，将研究海盐气溶胶水中臭氧氧化二氧化硫产生非海盐硫酸盐的作用。 在ACE-1密集期间，以及在从华盛顿州西雅图到塔斯马尼亚州的船舶运输期间，将在澳大利亚格里姆角和研究船“发现者”号上使用大容量级联撞击采样器采集气溶胶粒子样本。离子色谱法分析在撞击器的不同阶段收集的气溶胶中的阴离子和阳离子，沿着与海盐颗粒模式、二氧化硫、臭氧、和其他环境空气浓度以及气象参数将提供必要的数据，用于比较几个海水中观测到的和模型预测的非海盐硫酸盐，盐模式尺寸分数。这些数据，沿着他们的解释，也将提供一个估计的贡献，二氧化硫氧化的这种机制，使二氧化硫损失率以及总的硫预算在海洋边界层。

9419418 Sievering This project is part of the Southern Hemisphere Marine Aerosol Characterization Experiment (ACE-1), which will be conducted in the remote Southern Pacific in 1995 using aircraft, ship-board, and ground-based measurements of a wide variety of chemical species, physical and meteorological parameters with the central goal of investigating the formation, evolution, and optical properties of atmospheric aerosol. In this component, the role of non-sea-salt sulfate production from the oxidation of sulfur dioxide by ozone in sea-salt aerosol water will be investigated. Aerosol particle samples will be obtained with a high-volume cascade impactor at Cape Grim, Australia and aboard the research vessel Discoverer during the ACE-1 intensives, as well as during ship transit from Seattle, WA, to Tasmania. Ion chromatography analysis for anions and cations from aerosols collected in the different stages of the impactor, along with complementary data on the water associated with size fractions of the sea-salt particle mode, sulfur dioxide, ozone, and other ambient air concentrations as well as meteorological parameters will provide the necessary data for a comparison of observed and model predicted non-sea-salt sulfate in several sea-salt mode size fractions. These data, along with their interpretation, will also provide an estimate of the contribution that this mechanism of sulfur dioxide oxidation makes to sulfur dioxide loss rates as well as the total sulfur budget in the marine boundary layer.