Heterogeneous Reaction Rate Studies of Cloud and Fog Droplets

云雾中水滴的非均相反应通道是大气中重要痕量气体化学转化的重要通道。决定痕量气体向大气液滴转移速率的基本参数之一是痕量气体分子在水表面的质量容纳系数或“粘着”系数。在这个研究项目中，将对大气中重要的非均相过程进行研究，包括测量各种物种的质量容纳系数及其与温度的关系。此外，还计划研究离子化学和二氧化硫和氨两种气体的共沉积对二氧化硫吸收的影响，表面物种的化学，以及电荷和表面活性剂涂层对气液相互作用的影响。这项研究的动机是将云和雾中的水滴作为大气痕量气体化学转化的管道的非均相反应路径的重要性。例如，决定痕量气体向大气液滴转移速率的基本参数之一是痕量气体分子在水表面的质量容纳系数或“粘着”系数。

Heterogeneous reaction pathways involving water droplets in clouds and fogs are important conduits for chemical transformation of important 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. In this research project the study of atmospherically important heterogeneous process including measurement of the mass accommodation coefficients and their temperature dependence for a variety of species will be undertaken. Additionally, studies of the effect on sulfur dioxide uptake of ion chemistry and co- deposition of two gases such as sulfur dioxide and ammonia, the chemistry of surface species, and the effect of electric charge and surfactant coating on gas-liquid interaction are planned. This research is motivated by the importance of heterogeneous reaction pathways involving water droplets in clouds and fogs as conduits for chemical transformation of atmospheric trace gases. For example, 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.