Heterogeneous Reaction Rate of Cloud and Fog Droplets

涉及水滴的非均相反应途径 云和雾越来越被视为 大气痕量气体的化学转化。 的一个基本 确定痕量气体转移速率的参数 大气中的水滴是质量的容纳或“粘附” 水表面上痕量气体分子的系数。 这个继续研究项目，在赠款下启动， ATM-8400748，旨在研究某些非均质化学品 大气层的重要性。 特别是， 粘附系数与液滴物理参数， 温度和尺寸以及化学参数，包括碳氢化合物 表面层和液滴化学成分将是 研究了 这些研究将扩大我们的适用性， 测量自然大气层。 化学反应动力学 也将使用这种技术来测量液滴表面的 为了确定本体水反应速率是否 适用于云和雾中的异构过程建模。 用于实时液滴表面分析的技术，例如受刺激的 拉曼散射和激光诱导荧光将被开发。

Heterogeneous reaction pathways involving water droplets in clouds and fogs are increasingly seen as important conduits for chemical transformation of atmospheric trace gases. One of the basic parameters which determines the transfer rate of trace gases into atmospheric droplets is the mass accommodation or "sticking" coefficient for trace gas molecules on aqueous surfaces. This continuation research project, initiated under grant ATM-8400748, is designed to study certain heterogeneous chemical processes of atmospheric importance. In particular, the variation of sticking coefficients with droplet physical parameters such as temperature and size and chemical parameters including hydrocarbon surface layers and droplet chemical composition will be investigated. These studies will broaden the applicability of our measurements to the natural atmosphere. Chemical reaction kinetics at the droplet surface will also be measured using this technique in order to determine whether bulk aqueous reaction rates are appropriate for modeling heterogeneous processes in clouds and fogs. Techniques for real-time droplet surface analysis such as stimulated Raman scattering and laser induced fluorescence will be developed.